Institute of Arctic and Alpine Research (INSTAAR)

ATMOSPHERIC RESEARCH LABORATORY

Publications

Group leader: Detlev Helmig

List of Publications and Patents

(with selected brief summaries of contents and selected links to abstracts)

Refereed Journal Articles


2017


Obrist D., Agnan Y., Jiskra M., Olson C.L., Colegrove D.P., Hueber J., Moore C.W., Sonke J.E., and Helmig D. (2017) Tundra uptake of atmospheric elemental mercury drives Arctic mercury pollution, Nature, 547, 201-204. (link to article)

 

Huang Y., Wu S., Kramer L.J., Helmig D., and Honrath R.E. (2017) Tropospheric ozone and its precursors at Summit, Greenland: comparison between observations and model simulations, Atmos. Chem. Phys. Discuss., 2017, 1-38. (link to article)

 

Newland M.J., Martinerie P., Witrant E., Helmig D., Worton D.R., Hogan C., Sturges W.T., and Reeves C.E. (2017) Changes to the chemical state of the Northern Hemisphere atmosphere during the second half of the twentieth century, Atmos. Chem. Phys., 17, 8269-8283. (link to article)

 

Tzompa-Sosa Z.A., Mahieu E., Franco B., Keller C.A., Turner A.J., Helmig D., Fried A., Richter D., Weibring P., Walega J., Yacovitch T.I., Herndon S.C., Blake D.R., Hase F., Hannigan J.W., Conway S., Strong K., Schneider M., and Fischer E.V. (2017) Revisiting global fossil fuel and biofuel emissions of ethane, J. Geophys. Res., 122, 2493–2512, doi:10.1002/ 2016JD025767. (link to article)

 

Zhang B., Owen R.C., Perlinger J.A., Helmig D., Martín M.V., Kramer L., Mazzoleni L.R., and Mazzoleni C. (2017) Ten-year chemical signatures associated with long-range transport observed in the free troposphere over the central North Atlantic. Elem. Sci. Anth. 5:000194, doi: 10.1525/elementa.194. (link to article)

 

Evans J.M., and Helmig D. (2017) Investigation of the influence of transport from oil and natural gas regions on elevated ozone levels in the northern Colorado front range, J. Air Waste Manag. Assoc., 67, 196-211. (link to article)


2016


Oltmans S.J., Karion A., Schnell R.C., Pétron G., Sweeney C., Helmig D., Montzka S.A., Wolter S., Neff D., Miller B.R., Hueber J., Conely S., and Johnson B.J. (2016) O3, CH4, CO2, CO, NO2, and NMHC aircraft measurements in the Uinta Basin oil and gas region under low and high ozone conditions in winter 2012 and 2013. Elem. Sci. Anth. 4: 000132, 1-12, doi: 10.12952/journal.elementa.000132. (link to article)

 

Pollmann J., Helmig D., Liptzin D., Thompson C.R., Hueber J., Tans P.P., and Lelieveld J. (2016) Variability analyses, site characterization, and regional [OH] estimates using trace gas measurements from the NOAA Global Greenhouse Gas Reference Network. Elem. Sci. Anth. 4: 000128. doi: 10.12952/journal.elementa.000128. (link to article)

 

Schnell R.C., Johnson B.J., Oltmans S.J., Cullis P., Sterling C., Hall E., Jordan A., Helmig D., Petron G., Ahmadov R., Wendell J., Albee R., Boylan P., Thompson C.R., Evans J., Hueber J., Curtis A.J., and Park J.-H. (2016) Quantifying wintertime boundary layer ozone production from frequent profile measurements in the Uinta Basin, UT, oil and gas region, J. Geophys. Res. Atmos. 121, 11,038-011,054. (link to article)

 

Angot H., Magand O., Helmig D., Ricaud P., Quennehen B., Gallée H., Del Guasta M., Sprovieri F., Pirrone N., Savarino J., and Dommergue A. (2016) New insights into the atmospheric mercury cycling in central Antarctica and implications on a continental scale, Atmos. Chem. Phys. 16, 8249-8264. (link to article)

Helmig D., Rossabi S., Hueber J., Tans P., Montzka S.A., Masarie K., Thoning K., Plass-Duelmer C., Claude A., Carpenter L.J., Lewis A.C., Punjabi S., Reimann S., Vollmer M.K., Steinbrecher R., Hannigan J.W., Emmons L.K., Mahieu E., Franco B., Smale D., and Pozzer A. (2016) Reversal of global atmospheric ethane and propane trends largely due to US oil and natural gas production, Nature Geosci, 9, 490-495. (link to article)

Legrand M., Preunkert S., Savarino J., Frey M.M., Kukui A., Helmig D., Jourdain B., Jones A.E., Weller R., Brough N., and Gallée H. (2016) Inter-annual variability of surface ozone at coastal (Dumont d'Urville, 2004–2014) and inland (Concordia, 2007–2014) sites in East Antarctica, Atmos. Chem. Phys., 16, 8053-8069. (link to article)

Van Dam B., Helmig D., Doskey P.V., and Oltmans S.J. (2016) Summertime surface O3 behavior and deposition to tundra in the Alaskan Arctic, J. Geophys. Res. Atmos. 121, doi:10.1002/2015JD023914. (link to article)

 


2015


 

Kramer L.J., Helmig D., Burkhart J.F., Stohl A., Oltmans S., and Honrath R.E. (2015) Seasonal variability of atmospheric nitrogen oxides and non-methane hydrocarbons at the GEOSummit station, Greenland, Atmos. Chem. Phys., 15, 6827-6849. (link to article)

Van Dam B., Helmig D., Toro C., Doskey P., Kramer L., Murray K., Ganzeveld L., and Seok B. (2015) Dynamics of ozone and nitrogen oxides at Summit, Greenland: I. Multi-year observations in the snowpack, Atmos. Environ., 123, Part A, 268-284. (link to article)

Schultz M.G., Akimoto H., Bottenheim J., Buchmann B., Galbally I.E., Gilge S., Helmig D., Koide H., Lewis A.C., Novelli P.C., Plass-Dülmer C., Ryerson T.B., Steinbacher M., Steinbrecher R., Tarasova O., Tørseth K., Thouret V., and Zellweger C. (2015) The Global Atmosphere Watch reactive gases measurement network. Elem. Sci. Anth. 3: 000067. doi: 10.12952/journal.elementa.000067. (link to article)

Murray K.A., Kramer L.J., Doskey P.V., Ganzeveld L., Seok B., Van Dam B., and Helmig D. (2015) Dynamics of ozone and nitrogen oxides at Summit, Greenland. II. Simulating snowpack chemistry during a spring high ozone event with a 1-D process-scale model. Atmos. Environ.117, 110-123. (link to article)

Liptzin D., Helmig D., Schmidt S.K., Seok B., and Williams M.W. (2015) Winter gas exchange between the atmosphere and snow-covered soils on Niwot Ridge, Colorado, USA, Plant Ecology & Diversity, 1-12. (link to article)

Helmig D., Munoz M., Hueber J., Mazzoleni C., Mazzoleni L., Owen R.C., Val Martin M., Fialho P., Plass-Duelmer C., Palmer P.I., Lewis A.C., and Pfister G. (2015) Climatology and atmospheric chemistry of the non-methane hydrocarbons ethane and propane over the North Atlantic. Elem. Sci. Anth. 3: 000054 doi: 10.12952/journal.elementa.000054. (link to article)

Gray C. M., Helmig D., Fierer N. (2015) Bacteria and fungi associated with isoprene consumption in soil. Elem. Sci. Anth. 3: 000053 doi: 10.12952/journal.elementa.000053 (link to article)

Hu L., Millet D.B., Baasandorj M., Griffis T.J., Turner P., Helmig D., Curtis A.J., and Hueber J. (2015) Isoprene emissions and impacts over an ecological transition region in the U.S. Upper Midwest inferred from tall tower measurements. J. Geophys. Res. Atmos., 120, 3553–3571. doi: 10.1002/2014JD022732. (link to article)

Preunkert, S., Legrand, M., Frey, M. M., Kukui, A., Savarino, J., Gallée, H., King, M., Jourdain, B., Vicars, W., and Helmig, D. (2015) Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer, Atmos. Chem. Phys., 15, 6689-6705, doi:10.5194/acp-15-6689-2015 (link to article)

Boylan P, Helmig D, Oltmans S (2015) Ozone in the Atlantic Ocean marine boundary layer. Elem. Sci. Anth. 3: 000045 doi: 10.12952/journal.elementa.000045 (link to article)

Dzepina K., Mazzoleni C., Fialho P., China S., Zhang B., Owen R.C., Helmig D., Hueber J., Kumar S., Perlinger J.A., Kramer L.J., Dziobak M.P., Ampadu M.T., Olsen S., Wuebbles D.J., and Mazzoleni L.R. (2015) Molecular characterization of free tropospheric aerosol collected at the Pico Mountain Observatory: a case study with a long-range transported biomass burning plume, Atmos. Chem. Phys., 15, 5047-5068. (link to article)

Seok B., Helmig D., Liptzin D., Williams M.W., Vogel C.S. (2015) Snowpack-atmosphere gas exchanges of carbon dioxide, ozone, and nitrogen oxides at a hardwood forest site in northern Michigan. Elem. Sci. Anth. 3, 000040. (link to article)

China S., Scarnato B., Owen R.C., Zhang B., Ampadu M.T., Kumar S., Dzepina K., Dziobak M.P., Fialho P., Perlinger J.A., Hueber J., Helmig D., Mazzoleni L.R., Mazzoleni C. (2015) Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties. J. Geophys. Res. Let., 2014GL062404. (link to article)

Lawson S.J., Selleck P.W., Galbally I.E., Keywood M.D., Harvey M.J., Lerot C., Helmig D., Ristovski Z. (2015) Seasonal in situ observations of glyoxal and methylglyoxal over the temperate oceans of the Southern Hemisphere. Atmos. Chem. Phys. 15, 223-240. (link to article)

Emmons L.K., Arnold S.R., Monks S.A., Huijnen V., Tilmes S., Law K.S., Thomas J.L., Raut J.C., Bouarar I., Turquety S., Long Y., Duncan B., Steenrod S., Strode S., Flemming J., Mao J., Langner J., Thompson A.M., Tarasick D., Apel E.C., Blake D.R., Cohen R.C., Dibb J., Diskin G.S., Fried A., Hall S.R., Huey L.G., Weinheimer A.J., Wisthaler A., Mikoviny T., Nowak J., Peischl J., Roberts J.M., Ryerson T., Warneke C., and Helmig D. (2015) The POLARCAT Model Intercomparison Project (POLMIP): overview and evaluation with observations, Atmos. Chem. Phys., 15, 6721-6744. (link to article)

Ahmadov R., McKeen S., Trainer M., Banta R., Brewer A., Brown S., Edwards P.M., de Gouw J.A., Frost G.J., Gilman J., Helmig D., Johnson B., Karion A., Koss A., Langford A., Lerner B., Olson J., Oltmans S., Peischl J., Pétron G., Pichugina Y., Roberts J.M., Ryerson T., Schnell R., Senff C., Sweeney C., Thompson C., Veres P.R., Warneke C., Wild R., Williams E.J., Yuan B., Zamora R. (2015) Understanding high wintertime ozone pollution events in an oil- and natural gas-producing region of the western US. Atmos. Chem. Phys. 15, 411-429. (link to article)



2014


 

Thompson C., Hueber J., and Helmig D. (2014) Influence of oil and gas emissions on ambient atmospheric non-methane

hydrocarbons in residential areas of Northeastern Colorado. Elem. Sci. Anth. 3, 000035, 1-17, doi: 10.12952/journal.elementa.000035. (link to article)


Edwards P.M., Brown S.S., Roberts J.M., Ahmadov R., Banta R.M., deGouw J.A., Dube W.P., Field R.A., Flynn J.H., Gilman J.B., Graus M., Helmig D., Koss A., Langford A.O., Lefer B.L., Lerner B.M., Li R., Li S.-M., McKeen S.A., Murphy S.M., Parrish D.D., Senff C.J., Soltis J., Stutz J., Sweeney C., Thompson C.R., Trainer M.K., Tsai C., Veres P.R., Washenfelder R.A., Warneke C., Wild R.J., Young C.J., Yuan B., Zamora R. (2014) High winter ozone pollution from carbonyl photolysis in an oil and gas basin. Nature 514, 351-354. (link to article)

Oltmans S.J., Karion A., Schnel, R.C., Pétron G., Sweene, C., Wolter S., Neff D., Montzka S.A., Miller B. R., Helmig D., Johnson B.J., and Hueber J. (2014) A high ozone episode in winter 2013 in the Uinta Basin oil and gas region characterized by aircraft measurements, Atmos. Chem. Phys. Discuss. 14, 20117-20157, doi:10.5194/acpd-14-20117-2014. (link to article)

Trowbridge A.M., Daly R.W., Helmig D., Stoy P.C., and Monson R.K. (2014) Herbivory and climate interact serially to control monoterpene emissions from pinyon pine forests. Ecology 95, 1591-1603. (link to article)

Curtis A.J., Helmig D., Baroch C., Daly R., and Davis S. (2014) Biogenic volatile organic compound emissions from nine tree species used in the City and County of Denver, Colorado urban tree planting program. Atmos. Environ. 95, 634-643. (link to article)

Boylan P., Helmig D. and Park J.H. (2014) Characterization and mitigation of water vapor effects in the measurement of ozone by chemiluminescence with nitric oxide. Atmos. Meas. Tech. 7, 1231-1244. (link to article)

Pétron G., Karion A., Sweeney C., Miller B.R., Montzka S.A., Frost G., Trainer M., Tans P., Helmig D., Andrews A., Kofler J., Guenther D., Dlugokencky E., Lang P., Newberger T., Wolter S., Hall B., Novelli P., Brewer A., Conley S., Hardesty M., Banta R., White A., Noone D., Wolfe D., and Schnell R. (2014) A new look at hydrocarbons emissions from oil and gas operations in the Colorado Denver-Julesburg Basin. J. Geophys. Res. 119, 6836-6852. (link to article)

Rhoderick G.C., Duewer D.L., Apel E., Baldan A., Hall B., Harling A., Helmig D., Heo G.S., Hueber J., Kim M.E., Kim Y.D., Miller B., Montzka S., Riemer D. (2014) International comparison of a hydrocarbon gas standard at the pmol/mol level. Anal. Chem. 86, 2580-2589, dx.doi.org/10.1021/ac403761u. (link to article)

Helmig D., Petrenko V., Martinerie P., Witrant E., Röckmann T., Zuiderweg A., Holzinger R., Hueber J., Thompson C., White J.W.C., Sturges W., Baker A., Blunier T., Etheridge D., Rubino M., and Tans P. (2014) Reconstruction of Northern Hemisphere 1950 – 2010 atmospheric non-methane hydrocarbons. Atmos. Chem. Phys. 14, 1463-1483, doi:10.5194/acpd-14-1463-2014. (link to article)

Helmig D., Stephens C.R., Evans J., Boylan P., Hueber J., and Park J.-H. (2014) Highly elevated atmospheric levels of volatile organic compounds in the Uintah Basin, Utah. Environ. Sci. Technol., 10.1021/es405046r. (link to article)

Boylan P., Helmig D., Staebler R., Turnipseed A., Fairall C.W., and Neff W. (2014) Boundary layer dynamics during the Ocean-Atmosphere-Sea-Ice-Snow (OASIS) 2009 experiment at Barrow, AK. J. Geophys. Res. , 10.1002/2013JD020299. (link to article)

Zhang B., Owen R.C., Perlinger J.A., Kumar A., Wu S., Val Martin M., Kramer L., Helmig D., and Honrath R.E. (2014) A semi-Lagrangian view of ozone production tendency in North American outflow in summers 2009 and 2010. Atmos. Chem. Phys., 14, 2267-2287. (link to article)


2013


Helmig D., Stephens C.R., Caramore J., and Hueber J. (2013) Seasonal behavior of non-methane hydrocarbons in the firn air at Summit, Greenland. Atmos. Environ., 85, 234-246. (link to article)

Fain X., Helmig D., Hueber J., Obrist D., and Williams M.W. (2013) Mercury dynamics in the Rocky Mountain, Colorado, Snowpack. Biogeosciences, 10, 3793-3807, doi:10.5194/bg-10-3793-2013. (link to article)

Kumar A., Wu S., Weise M.F., Honrath R., Owen R.C., Helmig D., Kramer L., Val Martin M., and Li Q. (2013) Free troposphere ozone and carbon monoxide over the North Atlantic for 2001-2011. Atmos. Chem. Phys. 13, 12537-12547. (link to article)

Van Dam B.A., Helmig D., Neff W., Kramer L. (2013) Evaluation of boundary layer depth estimates at Summit Station, Greenland. J. Applied Meteorology and Climatology 52, 2356-2362. (link to article)

Helmig D., Daly R.W., Milford J., and Guenther A. (2013) Seasonal trends in biogenic terpene emissions. Chemosphere 93, 35 - 46. (link to article)

Edwards P.M., Young C.J., Aikin K., deGouw J.A., Dubé W.P., Geiger F., Gilman J.B., Helmig D., Holloway J.S., Kercher J., Lerner B., Martin R., McLaren R., Parrish D.D., Peischl J., Roberts J.M., Ryerson T.B., Thornton J., Warneke C., Williams E.J., and Brown S.S. (2013) Ozone photochemistry in an oil and natural gas extraction region during winter: simulations of a snow-free season in the Uintah Basin, Utah. Atmos. Chem. Phys. 13, 8955-8971. (link to article)

Seok, B., Helmig, D., Ganzeveld, L., Williams, M. W., and Vogel, C. S.: Dynamics of nitrogen oxides and ozone above and within a mixed hardwood forest in northern Michigan, Atmos. Chem. Phys., 13, 7301-7320, doi:10.5194/acp-13-7301-2013, 2013. (link to article)

Hu L., Millet D. B., Kim S. Y., Wells K. C., Griffis T. J., Fischer E. V., Helmig D., Hueber J., and Curtis A. J. (2013) North American acetone sources determined from tall tower measurements and inverse modeling. Atmos. Chem. Phys., 13, 3379-3392, doi:10.5194/acp-13-3379-2013, 2013. (link to article)

Palmer P. I., Parrington M., Lee J. D., Lewis A. C., Rickard A. R., Bernath P. F., Duck T. J., Waugh D. L., Tarasick D. W., Andrews S., Aruffo E., Bailey L. J., Barrett E., Bauguitte S. J.-B., Curry K. R., Di Carlo P., Chisholm L., Dan L., Forster G., Franklin J. E., Gibson M. D., Griffin D., Helmig D., Hopkins J. R., Hopper J. T., Jenkin M. E., Kindred D., Kliever J., Le Breton M., Matthiesen S., Maurice M., Moller S., Moore D. P., Oram D. E., O'Shea S. J., Christopher Owen R., Pagniello C. M. L. S., Pawson S., Percival C. J., Pierce J. R., Punjabi S., Purvis R. M., Remedios J. J., Rotermund K. M., Sakamoto K. M., da Silva A. M., Strawbridge K. B., Strong K., Taylor J., Trigwell R., Tereszchuk K. A., Walker K. A., Weave, D., Whaley C., and Young J. C. (2013) Quantifying the impact of BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites (BORTAS) experiment: design, execution and science overview. Atmos. Chem. Phys. 13, 6239-6261. (link to article)

Van Dam B., Helmig D., Burkhard J. F., Obrist D., and Oltmans S. (2013) Springtime boundary layer ozone and GEM depletion at Toolik Lake, Alaska.  J. Geophys. Res. Atmos., 118, 3382–3391, doi:10.1002/jgrd.50213. (link to article)


2012


Helmig D., Boylan P., Johnson B., Oltmans S., Fairall C., Staebler R., Weinheimer A., Orlando J., Knapp D., Montzka D., Flocke F., Freiß U., Sihler H., and Shepson P. (2012) Ozone dynamics and snow-atmosphere exchanges during ozone depletion events at Barrow, Alaska. J. Geophys. Res., 117, D20303, doi:10.1029/2012JD017531. 

Pratt K.A., Mielke L.H., Shepson P.B., Bryan A.M., Steiner A.L., Ortega J., Daly R., Helmig D., Vogel C.S. Griffith S., Dusanter S., Stevens P.S., Alaghmand M. (2012) Contributions of individual reactive biogenic volatile organic compounds to organic nitrates above a mixed forest. Atmos. Chem. Phys. 12, 10125-10143. (link to article)

Bryan A.M., Bertman S.B., Carroll M.A., Dusanter S., Edwards G.D., Forkel R., Griffith S., Guenther A.B., Hansen R.F., Helmig D., Jobson B.T., Keutsch F.N., Lefer B.L., Pressley S.N., Shepson P.B., Stevens P.S., and Steiner A.L. (2012) In-canopy gas-phase chemistry during CABINEX 2009: sensitivity of a 1-D canopy model to vertical mixing and isoprene chemistry. Atmos. Chem. Phys. 12, 8829-8849. (link to article)

Simpson I.J., Andersen M.P.S., Meinardi S., Bruhwiler L., Blake N.J., Helmig D., Rowland F.S., and Blake D.R. (2012) Long-term decline of global atmospheric ethane concentrations and implications for methane.  Nature 488, 490-494.

Van Dam B. and Helmig D. (2012) Comments on 'Possible contribution of triboelectricity to snow-air interactions'.  Environ. Chem. 9, 116-118. (link to article)

Helmig D., Lang E.K., Bariteau L., Boylan P., Fairall C.W., Ganzeveld L., Hare J.E., Hueber J., and Pallandt M. (2012) Atmosphere-ocean ozone fluxes during the TexAQS 2006, STRATUS 2006, GOMECC 2007, GasEx 2008, and AMMA 2008 cruises. J. Geophys. Res., 117, D04305, doi:10.1029/2011JD015955.

Baghi R., Helmig D., Guenther A., Duhl T. and Daly R. (2012) Contribution of flowering trees to urban atmospheric biogenic volatile organic compound emissions. Biogeosciences 9, 3777-3785. (link to article)

Parrington M., Palmer P.I., Henze D.K., Tarasick D.W., Hyer E.J., Owen R.C., Helmig D., Clerbaux C., Bowman K.W., Deeter M.N., Barratt E.M., Coheur P.-F., Hurtmans D., Jiang Z., George M., and J. R. Worden (2012) The influence of boreal biomass burning emissions on the distribution of tropospheric ozone over North America and the North Atlantic during 2010. Atmos. Chem. Phys., 12, 2077-2098, 2012. (link to article)


2011


Fairall C. W., Yang M., Bariteau L., Edson J.B., Helmig D., McGillis W., Pezoa S., Hare J.E., Huebert B., and Blomquist B. (2011) Implementation of the coupled ocean-atmosphere response experiment flux algorithm with CO2, dimethyl sulfide, and O3. J. Geophys. Res., 116, Article # C00F09, doi:10.1029/2010JC006884.

Edson J.B., Fairall C.W., Bariteau L., Zappa C.J., Cifuentes-Lorenzen A., McGillis W.R., Pezoa S., Hare J.E., and Helmig D. (2011) Direct covariance measurement of CO2 gas transfer velocity during the 2008 Southern Ocean gas experiment: Wind speed dependency. J. Geophys. Res. 116, Article # C00F10, DOI: 10.1029/2011JC007022.

Brodin M., Helmig D., Johnson B., and Oltmans S. (2011) Comparison of ozone concentrations on a surface elevation gradient with balloon-borne ozonesonde measurements. Atmos. Environ. 45, 5431-5439.

Grachev A. A., Bariteau L., Fairall C.W., Hare J.E., Helmig D., Hueber J., and Lang E.K. (2011) Turbulent fluxes and transfer of trace gases from ship-based measurements during TexAQS 2006, J. Geophys. Res., 116, D13110, doi:10.1029/2010JD015502.

Hu L., Millet D.B., Mohr M.J., Wells K.C., Griffis K.C., and Helmig D. (2011) Sources and seasonality of atmospheric methanol based on tall tower measurements in the US Upper Midwest. Atmos. Chem. Phys. 11, 11145-11156. (link to article)

Bocquet F., Helmig D., Van Dam B.A., and Fairall C.W. (2011) Evaluation of the flux gradient technique for measurement of ozone fluxes over snowpack at Summit, Greenland. Atmos. Meas. Tech. 4, 2305-2321. (link to article)

Duhl T.R., Guenther A., and Helmig D. (2011) Estimating urban vegetation cover fraction using Google Earth images.  Journal of Land Use Science, 1-19.


2010


Bariteau, L., Helmig D., Fairall C.W., Hare J.E., Hueber J., and Lang E.K. (2010) Determination of oceanic ozone deposition by ship-borne eddy covariance flux measurements. Atmos. Measurement Techniques 3, 441-455. (link to article)

Brodin M., Helmig D., and Oltmans S.J. (2010) Seasonal ozone behavior along an elevation gradient in the Colorado Front Range Mountains. Atmos. Environ., 44, 5304-5315.

Pozzer A., Pollmann J., Taraborrelli D., Jöckel P., Helmig D., Tans P., Hueber J., and Lelieveld J. (2010) Observed and simulated global distribution and budget of atmospheric C2-C5 alkanes. Atmos. Chem. Phys. 10, 4403-4422. (link to article)


2009


Helmig, D., Bottenheim J., Galbally I. E., Lewis A., Milton M. J. T., Penkett S., Plass-Duelmer C., Reimann S., Tans P., Theil S. (2009) Volatile Organic Compounds in the Global Atmosphere. Eos Trans. AGU, 90(52), Feature.

Ganzeveld L., Helmig D., Fairall C.W., Hare J., and Pozzer A. (2009) Atmosphere-Ocean Ozone Exchange - A global modeling study of biogeochemical, atmospheric and water-side turbulence dependencies. Global Biogeochem. Cycles 23, GB4021.

Williams M.W., Helmig D., and Blanken P. (2009) White on green: Under-snow microbial processes and trace gas fluxes through snow, Niwot Ridge, Colorado Front Range. Biogeochemistry 95, 1-12.

Kim S., Karl T., Helmig D., Daly R., Rasmussen R., and Guenther A. (2009) Measurement of atmospheric sesquiterpenes by proton transfer-reaction mass spectrometry (PTR-MS). Atmos. Meas. Tech. 2, 99-112. (link to article)

Helmig D., Cohen L.D., Bocquet F., Oltmans S., Grachev A., and Neff W. (2009) Spring and summertime diurnal ozone fluxes over the polar snow at Summit, Greenland.  Geophys. Res. Let. 38, L08809, doi:10.1029/2008GL036549.

Filippa G., Freppaz M., Williams M.W., Helmig D., Liptzin D., Seok B., Hall B. and Chowanski K (2009) Winter and summer nitrous oxide and nitric oxide fluxes from a seasonally snow-covered subalpine meadow at Niwot Ridge, Colorado. Biogeochemistry 95, 131-149.

Helmig D., Apel E.C., Balke D., Ganzeveld L., Lefer B. and Swanson A.L. (2009) Release and uptake of volatile inorganic and organic gases through the deep, winter snowpack at Niwot Ridge, Colorado. Biogeochemistry, 95, 167-183.

Helmig D., Seok B., Williams M.W., Hueber J. and Sanford R.J. (2009) Fluxes and chemistry of nitrogen oxides in the Niwot Ridge, Colorado, snowpack. Biogeochemistry 95, 115-130.

Liptzin D., Helmig D., Williams M.W., Seok B., Filippa G., Chowanski K., Hueber J. (2009) Process-level controls on CO2 fluxes from a seasonally snow-covered subalpine meadow soil, Niwot Ridge, Colorado. Biogeochemistry 151-166.

Seok B., Williams M.W., Helmig D., Liptzin D., Chowanski K., Hueber J. (2009) An automated system for continuous measurements of trace gas fluxes through snow: an evaluation of the gas diffusion method at a subalpine forest site, Niwot Ridge, Colorado Biogeochemistry 95, 95-113.


2008


Barkley M.P., Palmer P.I., Kuhn U., Kesselmeier J., Chance K., Kurosu T.P., Martin R.V., Helmig D., and Guenther A. (2008) Net ecosystem fluxes of isoprene over tropical South America inferred from GOME observations of HCHO columns. J. Geophys. Res., 113, Art. No. D20304.

Helmig D., Tanner D.M., Honrath R.E., Owen R.C., and Parrish D.D. (2008) Non-methane hydrocarbons (NMHC) at Pico Mountain, Azores. 1. Oxidation chemistry in the north-Atlantic region. J. Geophys. Res., 113, D20S91.

Honrath, R.E., Helmig, D., Owen R.C., Parrish D.D., Tanner D.M. (2008) Non-methane hydrocarbons (NMHC) at Pico Mountain, Azores. 2. Event-specific analyses of the impacts of mixing and photochemistry on hydrocarbon ratios. J. Geophys. Res., 113, D20S92.

Sakulyanontvittaya T., Guenther A., Helmig D., Milford J., and Wiedinmayer C. (2008) Secondary organic aerosol from sespuiterpene and monoterpene emissions in the United States. Envrion. Sci. Technol., 42, 8784-8790.

Pollmann J., Helmig D., Hueber J., Plass-Duelmer C., and Tans P. (2008) Sampling, storage, and analysis of C2-C7 non-methane hydrocarbons from the US National Oceanic and Atmospheric Administration Cooperative Air Sampling Network glass flasks. J. Chromatogr., 1188, 75-87.

Duhl T.R., Helmig D., and Guenther A. (2008) Sesquiterpene emissions from vegetation: a review. Biogeosciences, 5, 761-777.

Ortega J., and Helmig D. (2008) Review: Approaches for quantifying reactive and low volatility biogenic organic compound emissions by vegetation enclosure techniques – Part A. Chemosphere, 72, 343-364.

Ortega J., Helmig D., Daly R.W., Tanner D.M., Guenther A.B., and Herrick J.D. (2008) Approaches for quantifying reactive and low-volatility Biogenic Organic Compound (BVOC) emissions by vegetation enclosure techniques – Part B: Applications, Chemosphere, 72, 365-380.

Sakulyanontvittaya T., Duhl T., Wiedinmyer C., Helmig D., Matsunaga S., Potosnak M., Milford J., and Guenther A. (2008) Monoterpene and sesquiterpene emission estimates for the United States. Environ. Sci. Technol., 42, 1623-1629.

Duhl T.R., Helmig D. and Guenther A. (2008) Sesquiterpene emissions from vegetation: A review. Biogeosciences Discuss., 4, 3987-4023. (link to article)

Davis D.D., Seelig J., Huey G., Crawford J., Chen G., Wang Y., Buhr M., Helmig D., Neff W., Blake D., Arimoto R., and Eisele F. (2008) A reassessment of Antarctic plateau reactive nitrogen based on ANTCI 2003 airborne and ground based measurements. Atmos. Environ., 42, 2831-2848.

Neff W., Helmig D., Garchev A., and Davis D. (2008) A study of boundary layer behavior associated with high NO concentrations at the South Pole using a minisodar, tethered balloon, and sonic anemometer, Atmos. Environ., 42, 2762-2779.

Helmig D., Johnson B.J., Warshawsky M., Morse T., Neff W.D., Eisele F. and Davis D.D. (2008) Nitric oxide in the boundary-layer at South Pole during the Antarctic Tropospheric Chemistry Investigation (ANTCI). Atmos. Environ., 42, 2817-2830.

Eisele F., Davis D.D., Helmig D., Oltmans S.J., Neff W., Huey G., Tanner D., Chen G., Crawford J., Arimoto R., Buhr M., Mauldin L., Hutterli M., Dibb J., Blake D., Brooks S.B., Johnson B., Roberts J.M., Wang Y., Tan D. and Flocke F. (2008) Antarctic Tropospheric Chemistry Investigation (ANTCI) 2003 overview. Atmos. Environ., 42, 2749-2761.

Johnson B., Helmig D., and Oltmans S.J. (2008) Evaluation of ozone measurements from a tethered balloon sampling platform at South Pole Station in December, 2003, Atmos. Environ., 42, 2780-2787.

Oltmans S., Johnson B., and Helmig D. (2008) Episodes of high surface ozone amounts at South Pole during summer and their impact on the long-term surface ozone variation. Atmos. Environ., 42, 2804-2816.

Helmig D., Johnson B., Oltmans S.J., Neff W., Eisele F., Davis D.D. (2008) Elevated ozone in the boundary-layer at South Pole. Atmos. Environ., 42, 2788-2803.


2007


Bocquet F., Helmig D., and Oltmans S.J. (2007) Ozone in interstitial air of the mid-latitude, seasonal snowpack at Niwot Ridge, Colorado. Arctic, Antarctic and Alpine Research, 39, 375-387

Dibb J. E., Albert M., Anastasio C., Atlas E., Beyersdorf A.J., Blake N.J., Blake D.R., Bocquet F., Burkhart J.F., Chen G., Cohen L., Conway T.J., Courville Z., Frey M.M., Friel D.K., Galbavy E.S., Hall S., Hastings M.G., Helmig D., Huey L.G., Hutterli M.A., Jarvis J.C., Lefer B.L., Meinardi S., Neff W., Oltmans S.J., Rowland F.S., Sjostedt S.J., Steig E.J., Swanson A.L. and Tanner D.J. (2007) An overview of air-snow exchange at Summit, Greenland: Recent experiments and findings, Atmos. Environ. doi:10.1016/j.atmosenv.2006.12.006

Grannas A. M., Jones A. E., Dibb J., Ammann M., Anastasio C., Beine H. J., Bergin M., Bottenheim J., Boxe C. S., Carver G., Chen G., Crawford J. H., Dominé F., Frey M. M., Guzmán M. I., Heard D. E., Helmig D., Hoffmann M. R., Honrath R. E., Huey L. G., Hutterli M., Jacobi H. W., Klán P., Lefer B., McConnell J., Plane J., Sander R., Savarino J., Shepson P. B., Simpson W. R., Sodeau J. R., von Glasow R., Weller R., Wolff E. W., Zhu T., (2007) An overview of snow photochemistry: evidence, mechanisms and impacts, Atmos. Chem.Phys. 7, 4329-4373. (link to article)

Fairall C.W., Helmig D., Ganzeveld L., and Hare J. (2007) Water-side turbulence enhancement of ozone deposition to the ocean. Atmos. Chem. Phys., 7, 443–451, 2007. (link to article)

Helmig D., Ganzeveld L., Butler T., and Oltmans S.J. (2007) The role of ozone atmosphere-snow gas exchange on polar, boundary-layer tropospheric ozone – a review and sensitivity analysis. Atmos. Chem. Phys., 7, 15–30, 2007. (link to article)

Ortega J., Helmig D., Guenther A., Harley P., Pressley S., and Vogel C. (2007) Flux estimates and OH reaction potential of reactive biogenic volatile organic compounds (BVOC) from a mixed northern hardwood forest. Atmos. Environ. 41, 5479-5495.

Helmig D., Ortega J., Duhl T., Tanner D., Guenther A., Harley P., Wiedinmyer C., Milford J., and Sakulyanontvittaya T. (2007) Sesquiterpene emissions from pine trees - Identifications, emission rates and flux estimates for the contiguous United States. Environ. Sci. Technol. 41, 1545-1553. (link to abstract)

Cohen L., Helmig D., Neff W., Grachev A.A., and Fairall C.W. (2007) Boundary-layer dynamics and its influence on atmospheric chemistry at Summit, Greenland. Atmos. Environ., 41, 5044-5060.

Helmig D., Oltmans S.J., Carlson D., Lamarque J-F., Jones A., Labuschagne C., Anlauf K., and Hayden K. (2007) A review of surface ozone in the polar regions Atmos. Environ. 41, 5138-5161.

Helmig D., Bocquet F., Cohen L., and Oltmans S.J. (2007) Ozone uptake to the polar snowpack at Summit, Greenland. Atmos. Environ. 41, 5061-5076

Helmig D., Oltmans S.J., Morse T.O., and Dibb J.E. (2007) What is causing high ozone at Summit, Greenland? Atmos. Environ. 41, 5031-5043.

Kleissl J., Honrath R. E., Dziobak M. P., Tanner D., Val Mart´ın M., Owen R. C., and Helmig D. (2007) Occurrence of upslope flows at the Pico mountaintop observatory: A case study of orographic flows on a small, volcanic island, J. Geophys. Res., 112, D10S35, doi:10.1029/2006JD007565.


2006


Pollmann J., Helmig D., Hueber J., Tanner D., and Tans P. (2006) Evaluation of adsorbent materials for cryogen-free trapping-one stage-GC analysis of atmospheric C2-C6 non-methane hydrocarbons. J. Chrom., 1134, 1-15.

Helmig D., Ortega J., Guenther A., Herrick J.D., and Geron C. (2006) Sesquiterpene emissions from Loblolly Pine and their contribution to biogenic aerosol formation in the southeastern US. Atmos. Environ. 40, 4150–4157.

Tanner D., Helmig D., Hueber J., and Goldan P. (2006) A gas chromatography system for the automated, unattended, and cryogen-free monitoring of C2 to C6 non-methane hydrocarbons in the remote troposphere.  J. Chrom. 1111, 76-88.

Helmig D., Ganzeveld L., Butler T., and Oltmans S.J. (2006) Ozone atmosphere-snow gas exchange. Atmos. Chem. Phys. Dis. 6, 1-40. (link to article)


2000 - 2005


Pollmann J., Ortega J., and Helmig D. (2005) Analysis of atmospheric sesquiterpenes: sampling losses and mitigation of ozone interferences. Environ. Sci. and Technol. 39, 9620-9629. (link to abstract)

Helmig D., Revermann T., and Hall, B. (2004) Characterization of a pressurized C5-C16 hydrocarbon gas calibration standard for air analysis.  Anal. Chem. 76, 6528-6534. (link to abstract)

Helmig D., Bocquet F., Pollmann J., and Revermann T. (2004) Analytical techniques for sesquiterpene emission rate studies in vegetation enclosure experiments.  Atmos. Environ. 38, 557-572. (link to abstract)

Helmig D., Revermann T., Pollmann J., Kaltschmidt O., Jiménez Hernández A., Bocquet F., and David D. (2003) Calibration system and analytical considerations for quantitative sesquiterpene measurements in air.  J. Chrom. 1002, 193-211. (link to abstract)

Karbiwnyk C.M., Mills C.S., Helmig D., and Birks J.W. (2003) Use of chlorofluorcarbons (CFC) as internal standards for the measurement of atmospheric non-methane volatile organic compounds sampled onto solid adsorbent cartridges.  Environ. Sci. Technol.  37, 1002-1007. (link to abstract)

Karbiwnyk C.M., Mills C.S., Helmig D., and Birks J.W. (2002) Minimization of water vapor interference in the analysis of non-methane volatile organic compounds by solid adsorbent sampling. J. Chrom. A 958, 219-229. (link to abstract)

Helmig D., Boulter J., David D., Birks J.W., Cullen N.J., Steffen K., Johnson B.J., and Oltmans J.W. (2002) Ozone and meteorological boundary-layer conditions at Summit, Greenland, during June 3-12, 2000. Atmos. Environ. 36, 2595-2608. (link to abstract)

Kuck L.R., Smith T.Jr., Balsley B.B., Helmig D., Conway T.J., Tans P.P., Davis K., Jensen M., Bognar J.A., Vazques Arrieta R., Rodriguez R., and Birks J.W. (2000) Measurements of landscape-scale fluxes of carbon dioxide in the Peruvian Amazon by vertical profiling through the atmospheric boundary layer J. Geophys. Res. 105, 22137-22146. 

Wagner P.W., Helmig D., and Fall R. (2000) Isoprene biosynthesis in bacillus subtilis via the methulerythritol phosphate pathway. J. Natural Products 63, 37-40. Guenther A., Archer S., Greenberg J., Harley P., Helmig D., Klinger L., Vierling L., Wildermuth M., Zimmerman P., and Zitzer S. (1999) Biogenic hydrocarbon emissions and landcover/climate change in a subtropical savanna. Phys. Chem. Earth (B) 24, 659-667.


1995-1999


Helmig D. (1999) Review: Gas chromatography air analysis. J. Chrom. 843, 129-146. (link to abstract)

Greenberg J.P., Guenther A., Zimmerman P., Baugh W., Geron C., Davis K., Helmig D. and Klinger L.F. (1999) Tethered balloon measurements of biogenic VOCs in the atmospheric boundary layer. Atmos. Environ. 33, 855-867.

Isebrands J.G., Guenther A.B., Harley P., Helmig D., Klinger L., Vierling L., Zimmerman P. and Geron C. (1999) Volatile organic compound emission rates from mixed deciduous and coniferous forests in Northern Wisconsin, USA. Atmos. Environ., 33, 2527-2536.

Helmig D., Klinger L.F., Guenther A., Vierling L., Zimmerman P., and Geron Ch. (1999) Biogenic volatile compound emissions. I. Identifications from three sites in the U.S. Chemosphere 38, 2163-2187. (link to abstract)

Helmig D., Klinger L.F., Guenther A., Vierling L., Zimmerman P., and Geron Ch. (1999) Biogenic volatile compound emissions. II. Flux potentials from three sites in the U.S. Chemosphere 38, 2189-2204. (link to abstract)

Helmig D., Greenberg J., Guenther A., Zimmerman P., and Geron C. (1998) Biogenic Volatile Organic Compound (BVOC) emissions and their oxidation products at a temperate deciduous forest site. J. Geophys. Res. 103, 22397-22414. (link to abstract)

Helmig D., Balsley B., Davis K., Kuck L.R., Jensen M.L., Bognar J., Smith T.Jr., Vasquez Arrieta R., Rodriguez R., and Birks J. (1998) Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon. J. Geophys. Res. 103, 25,519-25,532. (link to abstract)

Serca D., Guenther A.B., Helmig D., Hereid D., Klinger L., and Zimmerman P. (1998) Methyl bromide deposition to soils. Atmos. Environ. 32, 1581-1586.

Helmig D. (1997) Review Article: Ozone removal techniques in the sampling of atmospheric volatile organic trace gases. Atmos. Environ. 31, 3635-3651.

Helmig D. (1996) Artifact-free preparation, storage and analysis of solid adsorbent sampling cartridges used in the analysis of volatile organic compounds in air. J. Chrom. 732, 414-417.

Helmig D., Pollock W., Greenberg J., and Zimmerman P.R. (1996) Gas chromatography mass spectrometry analysis of volatile organic trace gases at Mauna Loa Observatory, Hawaii. J. Geophys. Res. 101, 14697-14710.

Greenberg J.P., Helmig D., and Zimmerman P.R. (1996) Seasonal measurements of nonmethane hydrocarbons and carbon monoxide at the Mauna Loa Observatory during the Mauna Loa Observatory Photochemistry Experiment 2. J. Geophys. Res. 101, 14581-14598.

Guenther A., Greenberg J., Harley P., Helmig D., Klinger L., Vierling L., Zimmerman P., and Geron C. (1996) Leaf, branch, stand, and landscape scale measurements of volatile organic compound fluxes from U.S. Woodlands. Tree Physiology 16, 17-24.

Helmig D. and Vierling L. (1995) Water adsorption capacity of the solid adsorbents Tenax TA, Tenax GR, Carbotrap, Carbotrap C, Carbosieve S III and Carboxen 569 and water management techniques. Anal. Chem. 67, 4380-4386.

Helmig D. and Greenberg J. (1995) Artifact formation from the use of potassium iodide (KI) based ozone traps in atmospheric sampling. J. High Res. Chrom. 18, 15-18.


Pre-1995


Helmig D. and Greenberg J. (1994) Automated in-situ gas chromatography/mass spectrometry (GC/MS) analysis of ppt level volatile organic trace gases using multistage solid adsorbent trapping. J. Chrom. 677, 123-132.

Greenberg J.P., Lee B., Helmig D. and Zimmerman P.R. (1994) Fully-automated gas chromatograph-flame ionization detector system for the in situ determination of atmospheric non-methane hydrocarbons at low parts per trillion concentration. J. Chrom. 676, 389-398.

Helmig D. and Harger W.P. (1994) OH radical-initiated gas-phase reaction products of phenanthrene. Sci. Tot. Environ. 148, 11-21.

Renner E., Rolle W., and Helmig D. (1993) Comparison of computed and measured photooxidant concentrations at a forest site. Chemosphere 27, 881-898.

Helmig D. and Arey J. (1992) Analytical chemistry of four nitrodibenzopyranone isomers for ambient air analysis. Int. J. Environ. Anal. Chem. 49, 207-219.

Helmig D., Lopez-Cancio J., Arey J., Harger W.P., and Atkinson R. (1992) Quantification of ambient nitrodibenzopyranones: Further evidence of atmospheric mutagen formation. Environ. Sci. Technol. 26, 2207-2213.

Helmig D., Arey J., Atkinson R., Harger W., and McElroy P.A. (1992) Products of the OH radical-initiated gas-phase reaction of fluorene in the presence of NOx. Atmos. Environ. 26a, 1735-1745.

Helmig D. and Arey J. (1992) Organic chemicals in the air at Whitaker's Forest/Sierra Nevada Mountains, California. Sci. Tot. Environ. 112, 233-250.

Arey J., Harger W.P., Helmig D., and Atkinson R. (1992) Bioassay-directed fractionation of mutagenic PAH photooxidation products and ambient particulate extracts. Mutation Research 281, 67-76.

Helmig D., Arey J., Harger W.P., Lopez-Cancio J., and Atkinson R. (1992) Formation of mutagenic nitrodibenzopyranones and their occurrence in ambient air. Environ. Sci. Technol. 26, 622-624.

Helmig D. and Arey J. (1991) Analytical chemistry of airborne nitrofluorenes. Int. J. Environ. Anal. Chem. 43, 210-233.

Helmig D., Schwarzer N., and Steinhanses J. (1990) Flame control accessory for GC-FID operation with autosampler injection. HRC&CC 13, 849-851.

Helmig D., Müller J., and Klein W. (1990) Analysis of peroxyacetyl nitrate (PAN) in the vertical profile of a spruce stand. Atmos. Environ. 24A, 2141-2152.

Helmig D., Bauer A., Müller J., and Klein W. (1990) Analysis of particulate organics in a forest atmosphere by thermodesorption GC/MS. Atmos. Environ. 24A, 179-184.

Helmig D., Müller J., and Klein W. (1989) Improvements in analysis of atmospheric peroxyacetyl nitrate (PAN). Atmos. Environ. 23, 2187-2192.

Helmig D., Müller J., and Klein W. (1989) Volatile organic substances in a forest atmosphere. Chemosphere 19, 1399-1412.

Helmig D., Jackwerth E., and Hauptmann A. (1989) Archaeometallurgical fieldwork and the use of a portable x-ray spectrometer. Archaeometry 31, 181-191.

BACK

Non-Refereed Articles, Book Chapters, Abstracts


2017



WMO (2017) WMO Reactive Gases Bulletin: Highlights from the Global Atmosphere Watch Programme, World Meteorological Organization. (link to bulletin)


2016


Scientific Advisory Group for Reactive Gases (incl. D. Helmig) of World Meteorological Organization Global Atmospheric Watch (2016) 11. Volatile Organic Compounds (VOCs). In WMO WDCGG Data Summary, WDCGG No. 40, pp. 53-58. Japan Meteorological Agency in Cooperation with World Meteorological Organization. March 2016.

Wang W., Hueber J., Curtis A.J., Couret C., Ries L., and Helmig D. (2016) Halogenated Trace Gases and Volatile Organic Compounds at the Global Atmospheric Watch Observatory Schneefernerhaus/Zugspitze, Germany, abstract presented at NOAA ESRL Global Monitoring Annual Conference, NOAA, Boulder, Colorado, May 17-18.


Colegrove D., Helmig D., Dlugokencky E., Dutton G.S., Hueber J., and Blanchard B. (2016) Comparison of CH4 Monitoring Methods at GEOSummit, abstract presented at NOAA ESRL Global Monitoring Annual Conference, NOAA, Boulder, Colorado, May 17-18.


Helmig D., Rossabi S., Hueber J., Tans P.P., Montzka S.A., Masarie K., Thoning K., Plass-Duelmer C., Claude A., Lewis A.C., Carpenter L.J., Punjabi S., Reimann S., Vollmer M.K., Steinbrecher R., Hannigan J., Emmons L., Mahieu E., Franco B., Smale D., and Pozzer A. (2016) A Reversal of Long-term Global Trends in Atmospheric Ethane and Propane from North American Oil and Natural Gas Emissions, abstract presented at NOAA ESRL Global Monitoring Annual Conference, NOAA, Boulder, Colorado, May 17-18 (link to poster).


Helmig D., and Pozzer A. (2016) Sensitivity of Surface Ozone to Recent Increases of Volatile Organic Compound Emissions from the Growth of North American Oil and Natural Gas Industries, abstract 3.068 presented at IGAC 2016 Conference, International Global Atmospheric Chemistry, Breckenridge, Colorado, September 26-30.


Newland M., Martinerie P., Witrant E., Helmig D., Worton D., Hogan C., Sturges B., and Reeves C. (2016) Evidence for an increase in the oxidative capacity of the atmosphere in the late twentieth century, abstract EGU2016-14602 presented at EGU General Assembly, European Geophysical Union, Vienna, Austria, April 17-22.

 


Obrist D., Agnan Y., Hedge C., Moore C.W., Helmig D., Hueber J., and Paxton D. (2016) Two-year record of trace gas (CO2, CH4, O2, and Hg0) concentrations and dynamics in arctic tundra soils of northern Alaska – seasonality, non-linear temperature controls, and effects of soil diffusivity (Invited), abstract GC42A-08 presented at AGU Fall Meeting, American Geophysical Union, San Francisco, California, December 12-16.


Sanyal S., Wuebbles D.J., Olsen S.C., Mazzoleni L.R., Mazzoleni C., Helmig D., and Fialho P. (2016) Modeling Trace Pollutants in the North Atlantic Free Troposphere and Comparisons with Observed Pollutant Concentrations at Pico, abstract A11E-0065 presented at AGU Fall Meeting, American Geophysical Union, San Francisco, California, December 12-16.


Plass-Duelmer C., Claude A. and Helmig D. (2016) Reversal of global atmospheric ethane and propane trends related to fracking in USA.   GAW Letter of DWD, No 69, 1-2.  August 2016 (link to letter)


2015


 

Ramirez T.G.N., Marshall J., Houweling S., Dlugokencky E.J., Worthy D.E.J., Vaughn B., Simpson I., White J., Brand W.A., Sasakawa M., Nichol S., Ramonet M., Tyler S.C., Hueber J., Helmig D., Read K., Punjabi S., Gatti L.V., Krummel P., Heimann M., Melton J., Delmotte M., Fukuyama Y., Tohjima Y., Uhse K., Brailsford G., Brunke E., and Team T.M. (2015), Isolating wetland CH4 emissions using the additional constraints of δ13 CH4, and C2H6 in a inverse modeling framework, abstract EGU2015-13458-8 presented at EGU General Assembly, European Geophysical Union, Vienna, Austria, April 12-17.


Angot H., Dommergue A., Magand O., Helmig D., Pirrone N., and Sprovieri F. (2015), Year-round record of gaseous mercury in air and snow: new insights into mercury reactivity in Central Antarctica, abstract EGU2015-926-2 presented at EGU General Assembly, EGU, Vienna, Austria, 14 April 2015.

 

Helmig D. (2015), The Global Atmosphere Watch Reactive Gases Measurement Network, abstract presented at NOAA ESRL Global Monitoring Annual Conference, NOAA, Boulder, Colorado, May 19.

 

Petron G., Miller B., Mielke-Maday I., Kofler J., Montzka S., Dlugokencky E.J., Lang P., Andrews A.E., Sweeney C., Thorley E., Schwietzke S., Vaughn B., Frost G., Kim S., Tans P.P., Miller J.B., Helmig D., Karion A., Newberger T., Wolter S., Guenther D., Kitzis D., Hall B.D., Novellz P., Conley S., Wolfe D., and Schnell R.C. (2015), Results from the Multi-species Analysis of Discrete Air Samples Collected in the Denver-Julesburg Oil and Natural Gas Basin Between 2008 and 2014, abstract presented at NOAA ESRL Global Monitoring Annual Conference, Boulder, Colorado, 19 May 2015. 

 

Suarez-Salas L., Helmig D., and Rosales-Aylas G. (2015), First Tropospheric Ozone Measurements at the Observatory of Huancayo, Peru, abstract presented at NOAA ESRL Global Monitoring Annual Conference, Boulder, Colorado, 19 May 2015.

 

Hedge C., Obrist D., Agnan Y., Moore C., Biester H., and Helmig D. (2015), Soil and Plant Mercury Concentrations and Pools in the Arctic Tundra of Northern Alaska, abstract B13I-04 presented at AGU Fall Meeting, AGU, San Francisco, California, 14 December 2015.


Helmig D., Murray K., Kramer L., Doskey P., Dam B.V., Seok B., and Ganzeveld L. (2015), A Comparison of Process-Scale Modeling and Measurements of Atmosphere-Snowpack Exchange of Nitrogen Oxides at Summit, Greenland, abstract C13C-0838 presented at AGU Fall Meeting, AGU, San Francisco, California, 14 December 2015.

 

Obrist D., Helmig D., Agnan Y., Hedge C., Moore C., Paxton D., and Hueber J. (2015), Mercury dynamics of an arctic tundra ecosystem in northern Alaska: a mass balance,abstract B33G-03 presented at AGU Fall Meeting, San Francisco, California, 16 December 2015.

 

Sterling C., Johnson B., Schnell R., Oltmans S., Cullis P., Hall E., Jordan A., Windell J., McClure-Begley A., Helmig D., and Petron G. (2015), Quantifying Ozone Production throughout the Boundary Layer from High Frequency Tethered Profile Measurements during a High Ozone Episode in the Uinta Basin, Utah, abstract A11M-0258 presented at AGU Fall Meeting, AGU, San Francisco, California, 14 December 2015.

 

Liptzin D., and Helmig D. (2015), Spatial and temporal patterns of ozone in the high elevation ecosystems of the Colorado Rocky Mountains, abstract A21A-0023 presented at AGU Fall Meeting, AGU, San Francisco, California, 15 December 2015.

 

Agnan Y., Obrist D., Edwards G., Moore C., Hedge C., Helmig D., Paxton D., and Hueber J. (2015), Spatial and Temporal Variability of Methane Mole Fractions and Exchanges in and Between Soil, Snow, and the Atmosphere in a Tundra System in Northern Alaska, abstract B13D-0648 presented at AGU Fall Meeting, San Francisco, California, 14 December 2015.




2014


Dzepina, K., Mazzoleni, C., Fialho, P., China, S., Zhang, B., Owen, R., Helmig, D., Hueber, J., Kumar, S., Perlinger, J., Kramer, L., Dziobak, M., Ampadu, M., Olsen, S., Wuebbles, D., Mazzoleni, L. (2014), Molecular Characterization of Free Tropospheric Aerosol Collected at the Pico Mountain Observatory, Abstract A21J-3172 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.


Wright, K., Mazzoleni, L., FIalho, P., Dzepina, K., Helmig, D., Hueber, J., Dziobak, M., Kumar, S., China, S., Sharma, N., Mazzoleni, C. (2014), Optical Properties of Aged Free Tropospheric Aerosol Over the Northern Atlantic: Analysis of 2012-2014 Data, Abstract A31D-3065 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.


Helmig, D., Obrist, D., Moore, C., Van Dam, B., Hueber, J., Molnar, T., Williams, M., Kramer, L., Doskey, P., Fain, X. ( 2014), The Role of Snow Cover on Surface Trace Gas Exchanges at Toolik Lake, AK, Abstract B33G-01 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.


Van Dam, B., Helmig, D., Doskey, P., Oltmans, S., and Boylan, P. (2014), Boundary layer O3 dynamics and deposition to tundra during a summer in the Alaskan Arctic, Abstract B43B-0248 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.


Roberts, J., Edwards, P., Brown, S., Ahmadov, R., Bates, T., Gouw, J.D., Gilman, J., Graus, M., Helmig, D., Koss, A., Langford, A., Lefer, B., Lerner, B., Li, R., Li, S.-M., Liggio, J., McKeen, S., McLaren, R., Parrish, D., Quinn, P., Senff, C., Stutz, J., Thompson, C., Tsai, J.Y., Veres, P., Washenfelder, R., Warneke, C., Wild, R., Young, C., Yuan, B. (2014), An Overview of the Uintah Basin Winter Ozone Study Intensives: 2012, 2013, and 2014, Abstract C22B-03 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

Helmig, D., Thompson, C.R., Jacques, H., Smith, K.R., Terrell, R.M. (2014), Air Quality Impacts of Oil and Gas Operations in the Northern Colorado Front Range, Abstract A11L-06 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

Ahmadov, R., McKeen, S.A., Trainer, M., Banta, R.M., Brown, S.S., Edwards, P.M., Frost, G.J., Gilman, J., Helmig, D., Johnson, B., Karion, A., Koss, A., Lerner, B.M., Oltmans, S.J., Roberts, J.M., Schnell, R.C., Veres, P.R., Warneke, C., Williams, E.J., Wild, R.J., Yuan, B., Zamora, R.J., Petron, G., Gouw, J.D., Peischl, J. (2014), Understanding High Wintertime Ozone Events over an Oil and Natural Gas Production Region from Air Quality Model Perspective, Abstract A12C-01 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

Brown, S.S., Edwards, P.M., Roberts, J.M., Ahmadov, R., Banta, R.M., Gouw, J.A.D., Dube, W.P., Field, R.A., Gilman, J., Graus, M., Helmig, D., Koss, A., O'Neil, A., Langford, B.L.L., Lerner, B.M., McKeen, S.A., Li, S.-M., Murphy, S.M., Parrish, D.D., Senff, C.J., Stutz, J., Thompson, C.R., Trainer, M., Veres, P.R., Warneke, C., Wild, R.J., Young, C., Yuan, B., Zamora, R.J., Washenfelder, R.A. (2014), Winter Photochemistry Underlying High Ozone in an Oil and Gas Producing Region, Abstract A12C-02 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

Evans, J.M., Helmig, D., Thompson, C.R. (2014), Influence of Emissions from Oil and Gas Development on Elevated Ozone in the Northern Colorado Front Range, Abstract A13F-3246 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec. (link to poster)

Thompson, C.R., Evans, J.M., Wang, W., Hueber, J., Smith, K.R., Terrell, R., and Helmig, D. (2014), Influence of Oil and Gas Emissions on Ambient Atmospheric Volatile Organic Compounds in Residential Areas of Northeastern Colorado, Abstract A13E-3236 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.(link to poster)

Smith, K.R., Helmig, D., Thompson, C.R., Wang, W., Terrell, R.M., and Lewis, A.C. (2014), Evaluation and Application of a Solid Adsorbent Method for Monitoring Exposure to Volatile Organic Compounds from Oil and Gas Operations, Abstract A13F-3241 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec. (link to poster)

Mazzoleni, C., China, S., Scarnato, B.V., Moffet, R., OBrien, R.E., Gilles, M.K., Fialho, P., Ampadu, M., Kumar, S., Dzepina, K., Wright, K., Sharma, N., Zhang, B., Owen, R.C., Perlinger, J.A., Jacques, H., Helmig, D., Dziobak, M., Kramer, L.J., and Mazzoleni, L.R. (2014), Single Particle Characterization of Free Tropospheric Aerosols at the Pico Mountain Observatory over the North Atlantic, Abstract A31K-07 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

Hu, L., Millet, D.B., Baasandorj, M., Griffis, T.J., Turner, P.A., Helmig, D., Curtis, A., Hueber, J. (2014), Isoprene emissions and impacts in an ecological transition region inferred from tall tower measurement, Abstract A33H-3288 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

Thompson, C., Hueber, J., Terrell, R., Helmig, D., Kramer, L. Burkhart, J. (2014),  Seasonality and Trends of Atmospheric Transport Events to Summit, Greenland Derived from Long-term Non-methane Hydrocarbon Observations, Abstract presented at 2014 NOAA ESRL Global Monitoring Annual Conference, Boulder, Colorado, 20-21 May. Abstract, pg. 14.

Evans, J., Helmig, D. (2014), Source Distribution of Elevated Ozone in the Northern Colorado Front Range, Abstract presented at 2014 NOAA ESRL Global Monitoring Annual Conference, Boulder, Colorado, 20-21 May. Abstract, pg. 35.

R. Ahmadov, S. McKeen, M. Trainer, G.J. Frost, J.M. Roberts, J.D. Gouw, C. Warneke, J. Peischl, J., Gilman, S. Brown, P. Edwards, R. Wild, Y. Pichugina, A. Langford, R. Banta, A. Brewer, C. Senff, A., Karion, C. Sweeney, S.J. Oltmans, G. Petron, R.C. Schnell, B. Johnson,  D. Helmig (2014), Modeling of Atmospheric Methane and Ozone in the Uintah Basin, UT: The Role of Oil and Gas Emissions, Chemistry and Transport, Abstract presented at 2014 NOAA ESRL Global Monitoring Annual Conference, Boulder, Colorado, 20-21 May. Abstract, pg. 35.

R.M. Terrell, D. Helmig, E. Dlugokencky and J. Hueber (2014), Comparison of In Situ and Discrete Sample Methane Monitoring at Summit, Greenland, Abstract presented at 2014 NOAA ESRL Global Monitoring Annual Conference, Boulder, Colorado, 20-21 May. Abstract, pg. 91.


2013


Park J.-H., Guenther A., Helmig D.(2013) Ozone reactivity of biogenic volatile organic compound (BVOC) emissions during the Southeast Oxidant and Aerosol Study (SOAS). AGU Fall Meeting, San Francisco, Dec. 9-13, Abstract A13A-0172. (link to poster)

Liss P.S., Marandino C.A., Dahl E.E., Helmig D., Hintsa E.J., Hughes C., Johnson M.T., Moore R.M., Plane J.M.C., Quack B., Singh H.B., Stefels J., von Glasow R. and Williams J. (2013) Short-Lived Gases in the Surface Ocean and Atmosphere. In: Ocean-Atmosphere Interaction of Gases and Particles. Editors P.S. Liss and M.T. Johnson, Springer, Heidelberg, pp. 1-54.

Kramer L., Helmig D., Burkhart J., Stohl A. (2013) Boreal fire emissions in transported pollution plumes measured at the GEOSummit Station, Greenland. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-1935.

Zhang B., Owen R., Perlinger J., Kumar A., Wu S., Val Martin M., Kramer L., Helmig D. (2013) A Lagrangian view of ozone production tendency in North American outflow in summers 2009 and 2010. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-2315.

Helmig D., Hueber J., Munoz M., Mazzoleni C., Mazzoleni L., Owen R., Val-Martin M., Fialho P. (2013) Climatology and Atmospheric Chemistry of Non-Methane Hydrocarbon Emissions over the North Atlantic. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-3522.

Parrington M., Palmer P., Rickard A., Young J., Lewis A., Lee J., Henze D., Tarasick D., Hyer E., Yantosca R., Bowman K., Worden J., Griffin D., Franklin J., Helmig D. (2013) Quantifying the influence of boreal biomass burning emissions on tropospheric oxidant chemistry over the North Atlantic using BORTAS measurements. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-13954.

Murray K., Ganzeveld L., Kramer L., Doskey P., Helmig D., Seok B., Van Dam B. (2013) Atmosphere-Snowpack NOx Exchange: Measurements at Summit, Greenland and Process-Scale Modeling. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-4741.

Kramer L., Mazzoleni C., Mazzoleni L., Fialho P., Helmig D., Olsen S., Owen R., Dziobak M., Hueber J., Dzepina K., Kumar S. (2013) Measurement of Aerosols and Trace Gases in the Free Troposphere at the Pico Mountain Observatory in the Azores. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-11529.

Wu S., Kumar A., Weise M., Helmig D., Owen R., Kramer L., val Martin M., Palmer P.  (2013) Free-Troposphere ozone and carbon monoxide over the North Atlantic for 2001-2011. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-151.

Helmig D., Petrenko V., Martinerie P., Witrant E., Roeckmann T., Hueber J., Sturges W., Baker A., Blunier T., Etheridge D., Rubino M., Tans P., Zuiderweg A., Holzinger R. (2013) Trends and Climatology of Northern Hemisphere Non-Methane Hydrocarbon Emissions. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-3493.

Helmig D., Mass A., Hueber J., Fain X., Dommergue A., Barbero A., Savarino J. (2013) Snowpack Chemistry of Reactive Gases at Station Concordia, Antarctica. European Geosciences Union General Assembly, Vienna, Austria, 07 – 12 April, Abstract EGU2013-13932.


2012


Hu L., Millet D.B, Kim S.Y., Wells K.C., Griffis T.J., Helmig D., Fischer E.V. (2012) North American acetone sources determined from tall tower measurements and inverse modeling. AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract A11G-0134.

Blake F.T., Simpson I.J., Andersen M.S., Meinardi S., Bruhwiler L., Blake N.J., Helmig D. (2012) Long-term Decline of Global Atmospheric Ethane Concentrations and Implications for Methane. AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract A11H-0151.

Petron G., Kofler J.D., Frost G.F., Miller B.R., Edwards P.M., Dube W.P., Montzka S.A., Helmig D., Hueber J., Karion A., Sweeney C., Conley S.A., Brown S.S., Geiger F., Warneke C., Martin R.S., Andrews A.E., Dlugokencky E.J., Lang P.M., Trainer M., Hardesty R.M., Schnell R.C., Tans P.P. (2012) Emissions from oil and natural gas operations in northeastern Utah. AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract A23B-0214.

Helmig D., Boylan P.J., Hueber J., Van Dam B.A., Mauldin L., Parrish D.D. (2012) Atmospheric Impacts of Emissions from Oil and Gas Development in the Uintah Basin, Utah, USA. AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract A23B-0219.

Kumar S., Fialho P.J., Mazzoleni L.R., Olsen S.O., Owen R.C., Helmig D., Hueber J., Dziobak M., Kramer L.J., Mazzoleni C. (2012) Ten Years of Black Carbon Measurements in the North Atlantic at the Pico Mountain Observatory, Azores (2225m asl). AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract A43H-05.

Van Dam B.A., Helmig D., Honrath R.E., Hueber J., Seok B., Toro C., Kramer L.J., Ganzeveld L., Neff W.D. (2012) Year-round atmosphere-snowpack ozone exchanges at Summit, Greenland. AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract C51B-0773.

Wu S., Kumar A.,Weise M., Owen R.C., KramerL.J., Helmig D., Val Martin M. (2012) Background ozone and carbon monoxide over the North Atlantic in the past decade. AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract GC51B-1199.

Petron G., Sweeney C., Karion A., Brewer A., Hardesty R.M., Banta R.M., Frost G.F., Trainer M., Miller B.R., Conley S.A., Kofler J., Newberger T., Higgs J.A., Wolter S., Guenther D., Andrews A.E., Dlugokencky E.J., Lang P.M., Montzka S.A., Edwards P.M., Dube W.P., Brown S.S., Helmig D., Hueber J., Rella C., Jacobson J.A., Wolfe D.E., Bruhwiler L., Tans P.P., Schnell R.C. (2012) Top-down Constraints on Emissions: Example for Oil and Gas Operations. AGU Fall Meeting, San Francisco, Dec. 3-7, Abstract GC51G-06.

Baghi R., Helmig D., Guenther A., Duhl T., Daly R. (2012) Contribution of flowering trees to urban atmospheric biogenic volatile organic compound emissions. European Geosciences Union General Assembly, Vienna, Austria, 22 – 27 April, Abstract EGU2012-10830.


2011


Pratt K.A.; Mielke L.H.; Slade J.H.; Shepson P.B.; Pye H.O.; Bryan A.M.; Steiner A.L.; Ortega J.; Helmig D.; Griffith S.M.; Dusanter S.; Stevens P.S. (2011) Contributions of individual biogenic VOC precursors to SOA production above a mixed forest AGU Fall Meeting, San Francisco, Dec. 5-9, Abstract A13C-0326.

Hornbrook R.S.; Apel E.C.; Hills A.J.; Riemer D.D.; Fried A.; Weibring P.; Walega J.; Helmig D.; Staebler R.M. (2011) Impact of halogens on gas-phase NMOCs in the Arctic troposphere AGU Fall Meeting, San Francisco, Dec. 5-9, Abstract A13F-0427.

Kramer L.J.; Helmig D.; Oltmans S.J. (2011) Analysis of the seasonal variation of nitrogen oxides, peroxyacetyl nitrate, non-methane hydrocarbons and ozone in the remote Arctic troposphere. AGU Fall Meeting, San Francisco, Dec. 5-9, Abstract A14B-05.

Hu L., Mohr M.; Wells K.C.; Griffis T.J.; Helmig D.; Millet D.B. (2011) Sources and seasonality of atmospheric methanol based on tall tower measurements in the US Upper Midwest AGU Fall Meeting, San Francisco, Dec. 5-9, Abstract A41B-0067.

Boylan P., Helmig D., Lang E K., Bariteau L., Fairall C. W., Ganzeveld L., Hare J. E., Hueber J., Pallandt M. (2011) Biogeochemical and physical controls of atmosphere-ocean ozone fluxes during five cruises.  SOLAS-EGU-ESA Meeting, Frascati, Italy, Nov 29 - Dec 2. 

Boylan P., Helmig D., Staebler R., Fairall C. W., Hueber J. (2011) Ozone snow-atmosphere exchange during ozone depletion events in artic springtime at Barrow, AK, Fall Meeting, American Chemical Society, Denver, Colorado, Aug 28- Sept 1. Abstracts of Papers of the American Chemical Society, 242, 102-ENVR.

Pratt K.A.; Mielke L.H.; Shepson P.B.; Bryan A.M.; Steiner A.L.; Ortega J.; Helmig D.; Vogel C.S.; Griffith S.M.; Dusanter S.; Stevens P.S.; Alaghmand M. (2011) Contributions of individual biogenic volatile organic compounds to organic nitrate and secondary organic aerosol formation above a mixed forest, Fall Meeting, American Chemical Society, Denver, Colorado, Aug 28 - Sept 1. Abstracts of Papers of the American Chemical Society, 242, 21-ENVR.

Helmig D. and the WMO-GAW VOC Team. (2011) The WMO-GAW Volatile Organic Compound Program - Concept and Findings. Geophysical Research Abstracts 13, EGU2011-12153-1.


2010


Daly R. W., Helmig D., Guenther A. B., Baghi R., Baroch C., Borke C. (2010), Seasonal biogenic volatile organic compound emission trends of four coniferous tree species, Abstract A53C-0227 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec. 

Helmig D., Bottenheim J. W., Galbally I., Lewis A. C., Masarie K., Milton M., Penkett S., Plass-Duelmer C., Reimann S., Steinbrecher R., Tans P. P., Theil S. (2010) Volatile Organic Compounds in the Global Atmosphere (Invited), Abstract A41J-05 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec. 

Helmig D., Daly R., Bertman S. B. (2010), Ozone reactivity of biogenic volatile organic compounds from four dominant tree species at PROPHET-CABINEX, Abstract A53C-0240 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

Pratt, K. A., Mielke, L H., Shepson P. B., Bryan A. M., Steiner A. L., Helmig D. (2010) Contributions of Individual Biogenic Volatile Organic Compounds to Secondary Organic Aerosol and Organic Nitrate Formation above a Mixed Forest, Abstract A52A-06 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

Seok B., Helmig D., Williams, M. W., Ganzeveld L., Vogel C. S. (2010), What is causing morning nitric oxide "pulse" above the canopy at a forested site in northern Michigan?, Abstract A53C-0250 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.


2009


Neff W., Davis D., Helmig D. (2009) The use of Sodars with supporting instrumentation to study chemically active stable boundary layers over the polar ice sheets.  8th International Symposium on Lower Tropospheric Profiling, 18-23 October, Delft, The Netherlands, S11-002-1.

Helmig D., Apel E., Blake D., Ganzeveld L, Lefer B.L., Meinardi S., and Swanson A.L. (2009) Uptake of ozone-depleting halogenated gases to the snow-covered surface at Niwot Ridge, CO. Earth System Research Laboratory Global Monitoring Annual Conference, May 13-14, Boulder, Colorado, Abstracts, p. 33.

Boylan P. J., Helmig D., Booth J., Flocke F. M., Johnson B. J., Knapp D. J., Montzka D. D., Oltmans S. J., Weinheimer A. J., Zheng W. (2009), Boundary Layer Ozone Dynamics during the Spring 2009 OASIS Experiment in Barrow, AK, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract A31C-0106

Helmig D., Honrath R. E., Van Dam B. A., Kramer L. J., Ganzeveld L., Seok B., Doskey P. V., Hueber J. (2009), Trace Gas Dynamics in Snow and Their Role in Snow-Atmosphere Surface Exchanges (Invited), Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C34B-03

Kramer L. J., Honrath R. E., Helmig D., Hueber J., Oltmans S. J., Schnell R. C., Burkhart J. F., Stohl A. (2009), Interannual and Seasonal Variability of Biomass-Burning and Anthropogenic Emissions at Summit, Greenland, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract A43A-0227

Pierce A., Fain X., Obrist D., Helmig D., Barth C., Hueber J., Chowanski K., Boyle D., Williams M. (2009), Does seasonal snowpacks enhance or decrease mercury contamination of high elevation ecosystems?, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract A51G-0203

Toro C., Honrath R. E., Kramer L. J., Helmig D., Van Dam B. A., Seok B., Hueber J., Ganzeveld L., Doskey P. V. (2009), Seasonal variations of nitrogen oxides in snowpack air at Summit, Greenland, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C31E-0472

Van Dam B. A., Helmig D., Honrath R. E., Hueber J., Seok B., Kramer L. J., Toro C., Ganzeveld L. (2009), Measurements of near surface ozone at Summit, Greenland, using an automated moving inlet system, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C31E-0475

Helmig, D., Jaffe D., Val Martin M., Parrish D.(2009) In Memoriam Richard Honrath, Eos Trans. AGU, 90(46).


2008


Honrath R.E., Kramer L.J., Helmig D., Ganzeveld L., VanDam B.A., Seok B., Haman C., Lefer B. (2008) Nitrogen oxides and ozone in and above the snowpack at Summit, Greenland: Continuous observations of photochemical release and update, Eos Trans AGU, 89(53) Fall Meet. Suppl., Abstract C41C-0541.

Kramer L.J., Honrath R.E., Dziobak M.P., Helmig D., Hueber J., Goodwin S., Oltmans S.J., Schnell R.C., Burkhart J.F., Stohl A. (2008) Biomass-burning and anthropogenic impacts on arctic tropospheric chemistry assessed using measurements at Summit, Greenland. Eos Trans AGU, 89(53) Fall Meet. Suppl., Abstract A11A-0076.

Hare J., Bariteau L., Fairall C., Helmig D., Ganzeveld L, Lang K., Hueber J. (2008) Measurements of the air-sea flux of ozone from the Ronald H. Brown. Eos Trans AGU, 89(53) Fall Meet. Suppl., Abstract OS31B-1266.

Pollmann J., Helmig D., Williams J., Hueber J., Tans P. (2008) OH quantification through global scale trace gas measurements from the NOAA cooperative flask sampling network. Geophysical Abstracts, Vol. 10, EGU2008-A-05998.

Jaffe D., Honrath R., Fialho P., Helmig D. (2008) Mountain-top free tropospheric observations of atmospheric chemistry. Geophysical Abstracts, Vol. 10, EGU2008-A-04793.


2007


Pollmann J., Helmig D., Tans P., Lelieveld J. (2007) Measuring the global distribution of non-methane hydrocarbons utilizing the NOAA flask sampling network. Geophysical Research Abstracts, Vol. 9, 08724. SRef-ID: 1607-7962/gra/EGU2007-A-08724.

Neff W., Helmig D., Grachev A., Davis D. (2007) An overview of the effect of boundary layer processes on surface NO concentrations during ANTCI 2003. Geophysical Research Abstracts, Vol. 9, 09238. SRef-ID: 1607-7962/gra/EGU2007-A-09238.

Helmig D., Bocquet F., Cohen L., Ganzeveld L., Honrath R.E., Neff W., Oltmans S.J. (2007) Ozone fluxes over snow-covered environments. Eos Trans., AGU, 88(52), Fall Meet. Suppl., Abstract A53B-1145.

Filippa G., Liptzin D., Seok B, Chowanski K., Helmig D., Williams M.W., Freppaz M., Zanini E. (2007) A comparison of summer and winter CO2 fluxes from a seasonally snow-covered high Alpine meadow at Niwot Ridge, Colorado. Eos Trans., AGU, 88(52), Fall Meet. Suppl., Abstract C32A-02.

Seok B., Liptzin D., Chowanski K., Hueber J., Williams M.W., Helmig D. (2007) Cabon dioxide gas exchange through the snowpack and its contribution to the ecosystem carbon budget in a high-elevation, subalpine forest. Eos Trans., AGU, 88(52), Fall Meet. Suppl., Abstract C32A-01.

Liptzin D., Seok B., Philippa G., Helmig D., Hueber J., Williams M.W. (2007) Nitrous oxide fluxes from seasonally covered subalpine soils. Eos Trans., AGU, 88(52), Fall Meet. Suppl., Abstract C34A-03.


2006


Guenther A., Karl T., Harley P., Ortega J., and Helmig D. (2006) Surface ozone depletion potential of volatile emissions from vegetation. Integrated Land Ecosystem - Atmospheric Processes Study. Proceedings fo the 1st iLEAPS Science Conference Boulder, Colorado, USA, 21-26 January 2006, Aerosolitutkimusseura R.Y., Finnish Association for Aerosol Research, Report Series in Aerosol Science No. 79, pp. 73.

Ortega J., Helmig D., and Guenther A. (2006) A quantitative approach for deriving landscape flux estimates of reactive biogenic volatile organic compounds. Integrated Land Ecosystem - Atmospheric Processes Study. Proceedings fo the 1st iLEAPS Science Conference Boulder, Colorado, USA, 21-26 January 2006, Aerosolitutkimusseura R.Y., Finnish Association for Aerosol Research, Report Series in Aerosol Science No. 79, pp. 280-282.

Bocquet F., Cohen L., and Helmig D. (2006) Spring- and summer-time atmospheric ozone fluxes above the polar snowpack of Summit, Greenland. Geophysical Research Abstracts, Vol. 8, 00018, 2006, SREF-ID: 1607-7962/gra/EGU06-A-00018.

Honrath R.E., Owen R.C., Val Martin M., Helmig D., Parrish D.D., Li Q., Tanner D., Fialho P. (2006) Photochemical evolution of continental outflow to the N. Atlantic lower free troposphere during spring and summer, American Geophysical Union Fall Meeting, San Franciso, 11-15 Dec., Abstract A53B-0187.


2005


Honrath R.E., Fialho P., Helmig D., Val Martin M., Owen R.C., Kleissl J., Strane J.M., Dziobak M.P., Tanner D.M., and Barata F. (2005) A permanent free tropospheric observatory at Pico summit in the Azores Islands? Past measurements (2001-2005) and future plans.  Eos Trans. AGU, San Francisco, Dec. 5-9. Fall Meet. Suppl., Abstract A51D-0108.

Hare J., Fairall C., Helmig D., and Ganzeveld L. (2005) Water-side turbulence enhancement of ozone deposition to the ocean.  Eos Trans. AGU, San Francisco, Dec. 5-9. Fall Meet. Suppl., Abstract A11B-0879.

Tanner D., Helmig D., and Honrath R.E (2005) Non-Methane hydrocarbon measurement for long-range transport studies at Pico mountain, Azores, Portugal. Geophysical Research Abstracts, Vol7, 09371, 2005. (link to abstract)

Neff W., Helmig D., Davis D., Grachev A., and Gottas D. (2005) Mixing layer depth detection methods using sodars at the South Pole to interpret atmospheric chemistry experiment results. Geophysical Research Abstracts, Vol. 7, 09103, 2005.

Neff W., Davis D. and Helmig D. (2005) Boundary layer processes and surface exchange at South Pole: past results and new insights from the ANTCI 2003 experiment. Geophysical Research  Abstracts, Vol. 7, 09003, 2005.


2004


Bocquet F., Helmig D., Cohen L., Hueber J., Losleben M., and Oltmans S. (2004) Ozone Atmosphere-Snowpack Gas Exchange Processes in Polar and Midlatitude Snowpacks, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract A11B-0054.

Helmig D., Johnson B., Davis D., Eisele F., Neff W., Oltmans S., Oncley S., Warshawsky M., and Brown I. (2004) Boundary-Layer Ozone Production at South Pole, Antarctica, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract A21D-02.

Johnson B., Oltmans S., and Helmig D. (2004) Comparison of ozone measurements from a tethered balloon sampling platform at South Pole Station in December 2003, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract A11B-0041.

Oltmans S., Johnson B., Helmig D., and Oncley S. (2004) Episodes of high surface ozone amounts during the summer at South Pole, Antarctica, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract A11B-0036.

Neff W., Helmig D., Davis D., Buhr M., Gottas D., Grachev A., Oncley S., and Warshawsky M. (2004) The atmospheric boundary layer and its effect on NO concentrations during ANTCI-2003, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract A21D-03.

Herrick J.,Geron C., Arnts R., Helmig D., Pollmann J., Ortega J, and Rasmussen R. (2004) Emission measurements of mono and sequiterpenes from Loblolly Pine (Pinus taeda) using a dynamic branch enclosure technique, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract A43C-0065.

Ortega J., Helmig D., Guenther A., Presley S., and Lamb B. (2004) A quantitative approach for deriving landscape flux estimates of biogenic volatile organic compounds from isoprene to sesquiterpenes.  Poster Presentation at the 8th International Global Atmospheric Chemistry Meeting, 4-9 September, Christchurch, New Zealand, Abstract Volume pp. 241.

Bocquet F., Rick U., and Helmig D. (2004) Ozone uptake to Polar and mid-latitude.  Poster presentation at the 8th International Global Atmospheric Chemistry Meeting, 4-9 September, Christchurch, New Zealand, Abstract Volume pp. 115.

Helmig D., Bocquet F., Cohen L., Hueber J., Losleben M., Oltmans S., and Rick U. (2004) Ozone deposition to Polar and midlatitude snowpacks.  Poster Presentation at the 8th International Global Atmospheric Chemistry Meeting, 4-9 September, Christchurch, New Zealand, Abstract Volume pp. 120.

Helmig D., Honrath R., Kleissl J., Tanner D., and Val Martin M. (2004) Intercontinental transport study by speciated hydrocarbon analysis at Pico island, Azores. Poster Presentation at the 8th International Global Atmospheric Chemistry Meeting, 4-9 September, Christchurch, New Zealand, Abstract Volume pp. 154.

Helmig D., Johnson B., Davis D., Eisele F., Oltmans S.J., and Warshawsky M. (2004) Boundary layer ozone at South Pole, Antarctica.  Poster Presentation at the 8th International Global Atmospheric Chemistry Meeting, 4-9 September, Christchurch, New Zealand, Abstract Volume pp. 119.


2000-2003


Helmig D. (2003) In the Teeth of the Wind: South Through the Pole. Book Review. Arctic, Antarctic, and Alpine Research, Vol. 35, No. 4, pp. 540-541.

Helmig D., Bocquet F., Fuentes J.D., Oltmans S.J., and Tarasick D.W. (2003) Which processes determine ozone surface-atmosphere fluxes over snow? Aerosolitutkimusseura R.Y. Finnish Association for Aerosol Research. Report Series in Aerosol Science No 62A. Proceedings of ILEAPS: Integrated Land Ecosystem - Atmosphere Processes Study. International Open Science Conference, 29 September - 3 October 2003, Helsinki, Finland, pp. 142-144.

Ortega J., Helmig D., Guenther A., Pressley S., and Lamb B. (2003) Biogenic volatile organic compound fluxes: Evaluation of the enclosure technique and comparison with eddy correlation methods. Aerosolitutkimusseura R.Y. Finnish Association for Aerosol Research. Report Series in Aerosol Science No 62A. Proceedings of ILEAPS: Integrated Land Ecosystem - Atmosphere Processes Study. International Open Science Conference, 29 September - 3 October 2003, Helsinki, Finland, pp. 295-300.

F. Bocquet, T. Revermann, J. Pollmann, A. Jimenez, O. Kaltschmidt, and Helmig D. (2002) Sesquiterpene Emissions from Vegetation -Development of Analysis Techniques for Enclosure and Ambient Measurements. Poster at the AGU 2002 Fall Meeting, December 6-10, San Francisco, Eos. Trans. AGU, 83(47), Fall Meet. Supp., Abstract B22C-0783.

Ortega J.V., Ruppert J., and Helmig D. (2001) Eddy correlation flux measurements of volatile organic compounds by disjunct eddy sampling and ion trap mass spectrometry analysis.  Poster at the AGU 2001 Fall Meeting, December 10-14, San Francisco, Eos. Trans., AGU, 82(47), Fall Meet. Supp., Abstract A41B-0030.

Revermann T. and Helmig D. (2001) Sesquiterpene emissions from vegetation – chemical analysis technique for ambient measurements of the contribution to the formation of ozone and aerosols.  Poster presented at the AGU 2001 Fall Meeting, December 10-14, San Francisco, Eos. Trans., AGU, 82(47), Fall Meet. Supp., Abstract A41B-0034.

Helmig D., Alfieri J.D., Boulter J., David D., Cullen N., Stefan K., Johnson B., and Oltmans S. (2001) Vertical pro-files of ozone, water vapor and meteorological parameters and boundary-layer conditions at Summit, Greenland during June 2000.  Poster at the AGU 2001 Fall Meeting, December 10-14, San Francisco, Eos. Trans., AGU, 82(47), Fall Meet. Supp., Abstract A12A-0053.

Helmig D., David D., Birks J., Boulter J., Johnson B., and Oltmans S. (2000) Meteorological characterization of the planetary boundary layer and ozone atmosphere-snow flux measurements at Summit/Greenland. Eos Transactions, AGU Volume 81, Number 48, November 28, Abstract A11D-05.

Boulter J., Helmig D., David D., Birks J., Johnson B., and Oltmans S. (2000) Ozone profile measurements within the planetary boundary layer at Summit, Greenland: An intercomparison of electrochemical and UV absorbance techniques. Eos Transactions, AGU Volume 81, Number 48, November 28, Abstract A22C-25.

Kuck L.R., Smith T., Balsley B.B., Helmig D., Jensen M.L., Bognar J.A., Birks J., Conway T.J., Tans P.P., Arrieta R.V., and Rodriques R. (2000) Measurements of landscape-scale fluxes of carbon dioxide in the Peruvian Amazon by vertical profiling through the convective boundary layer. American Chemical Society, 219th National Meeting, San Francisco, March 26-30, Division of Physical Chemistry, Abstract Pap. Am. Chem. S. 219:U311, Part 2, Mar. 26.

Helmig D., Schulz K., and Birks J. (2000) Real-time measurement of atmospheric gases by mass spectrometry techniques. American Chemical Society, 219th National Meeting, San Francisco, March 26-30, Division of Physical Chemistry, Abstract Pap. Am. Chem. S. 219:U314, Part 2, Mar. 26.

Karbiwnyk C., Mills C, Helmig D., and Birks J. (2000) Vertical profiles of volatile organic compounds using ambient CFCs reference compounds. American Chemical Society, 219th National Meeting, San Francisco, March 26-30, Division of Physical Chemistry, Abstract Pap. Am. Chem. S. 219:U313, Part 2, Mar 26.


1995-1999


Karbiwnyk C., Mills C,  Birks J., and Helmig D. (1999) Vertical profile measurements of atmospheric non-methane volatile organic compounds using ambient CFCs as reference compounds. EOS Transactions, AGU Volume 80, Number 46, November 16, Abstract A21B-09.

Helmig D., Schulz K., and Birks J. (1999) Eddy correlation measurements of atmospheric volatile organic compound fluxes by ion trap mass spectrometry. Eos Transactions, AGU Volume 80, Number 46, November 16, Abstract A12A-02.

Karbiwnyk C., Birks J., and Helmig D. (1999) Measurement of atmospheric non-methane volatile organic compounds using ambient CFC reference compounds. The Pittsburgh Conference 50th Anniversary, Orlando, FL, March 7-12, Pittcon '99 Book of Abstracts, #1338.

Helmig D. (1999) Eddy correlation measurements of atmospheric volatile organic compounds emissions (fluxes). The Pittsburgh Conference 50th Anniversary, Orlando, FL, March 7-12, Pittcon '99 Book of Abstracts, #1354.

Helmig D. (1998) Perspectives in Environmental Chemistry. Book Review. Bulletin of the American Meteorological Society 79, pp. 2801-2803.

Karbiwnyk C., Helmig D., and Birks J. (1998) Profile measurements of atmospheric non-methane volatile organic compounds using ambient CFC reference compounds.  Fourth International Symposium on Tropospheric Profiling: Needs and Technology, Snowmass, Colorado, September 21-25, Extended Abstracts, Volume 1, pp. 167-168.

Karbiwnyk C., Birks J., and Helmig D. (1998) Measurement of atmospheric non-methane volatile organic compounds using ambient CFC reference compounds. Measurement of Toxic and Related Air Pollutants, Air & Waste Management Association. September 1-3, 1998, Abstracts, Cary, North Carolina, pp. 128-129.

Karbiwnyk C., Birks J. and Helmig D. (1998) Measurement of atmospheric non-methane volatile organic compounds using ambient CFC reference compounds. Joint International Symposium on Global Atmospheric Chemistry. Program and Abstracts. August 19-25, 1998, University of Washington, Seattle, pp. 110.

Helmig D., Balsley B., Davis K., Kuck L.R., Jensen M., Bognar J., Smith T., Vasquez Arrieta R., Rodriguez R., and Birks J. (1998) Vertical profiling and determination of landscape fluxes of biogenic non-methane hydrocarbons within the planetary boundary layer in the Peruvian Amazon. Joint International Symposium on Global Atmospheric Chemistry. Program and Abstracts. August 19-25, 1998, University of Washington, Seattle, pp. 110.

Helmig D., Geron C., Greenberg J., Guenther A., and Zimmerman P. (1997) Diurnal variations of biogenic volatile organic compound (BVOC) emissions and their oxidation products at Oak Ridge/TN. Workshop on Biogenic Hydrocarbons In The Atmospheric Boundary Layer, August 24-27, University of Virginia, American Meteorological Society, Conference Proceedings, pp. 95-98.

Helmig D., Birks J., Kuck L., and Balsley B. (1997) Vertical profiles of biogenic volatile organic compounds (BVOC) and isoprene oxidation products within the planetary boundary layer in the Peruvian Amazon. Workshop on Biogenic Hydrocarbons In The Atmospheric Boundary Layer, August 24-27, University of Virginia, American Meteorological Society, Conference Proceedings, pp. 117-120.

Helmig D., Greenberg J., Guenther A., Zimmerman P., and Geron C. (1997) Observation of biogenic emissions and their oxidation products at a forest site in Oak Ridge/TN. Proceedings Third Conference on Atmospheric Chemistry, American Meteorological Society Annual Meeting, February 2-7, Long Beach, CA, pp. 141-142.

Helmig D. and Vierling L.(1995) Water trapping capacity of solid adsorbents used in ambient air analysis of organic trace gases. The Pittsburgh Conference, New Orleans, Louisiana, March 5-10, 1995, Abstracts, #1135.


Pre-1995


Greenberg J., Helmig D., Zimmerman P., and Atlas E. (1994) Atmospheric volatile organic compounds containing nitrogen, oxygen, sulfur, and halogens: Identification, quantification, and sources. Joint Meeting on Global Atmospheric Chemistry, Fuji-Yoshida, Japan, September 5-9, 1994, pp. 219.

Helmig D., Klinger L., Guenther A., Greenberg J., and Zimmerman P. (1994) Landscape scale emission inventory of individual biogenic organic compounds in three ecosystems in the US. Joint Meeting on Global Atmospheric Chemistry, Fuji-Yoshida, Japan, September 5-9, 1994, pp. 98.

Helmig D., Klinger L.F., Greenberg J., and Zimmerman P. (1994) Emissions and identification of individual organic compounds from vegetation in 3 ecosystems in the United States. Abstracts of papers of the American Chemical Society, Vol. 207, March, pp. 162.

Greenberg J.P., Guenther A.B., Helmig D., Klinger L., and Zimmerman P. (1994) Field measurements of biogenic VOC fluxes from an urban forest by gradient and enclosure techniques. Abstracts of papers of the American Chemical Society, Vol. 207, March, pp. 243.

Helmig D., Bauer A., Müller J., and Klein W. (1992) Analysis of particulate organics in a forest atmosphere by thermodesorption GC/MS - Author's Reply. Atmos. Environ. 26A, 518-519.

Helmig D. (1990) Organische Chemikalien in der Waldatmosphäre. Dissertation, Wissenschafts-Verlag Dr. Wiegbert Maraun, Frankfurt (in German).

Helmig D., Iburg H., Fritsche U., Koerdel W., Klein W., Müller J., and Spurny K.R. (1989) Chemische und physikalische Charakterisierung der Waldatmosphäre, Internationaler Kongress Waldschadensforschung, Wissenstand und Perspektiven, 2-.6. Oktober, Friedrichshafen, Tagungsband, pp. 139-140.

Helmig D., Müller J., and Klein W. (1989) Analysis of hydrocarbons in a spruce forest, 3. Duisburger Tag der Chemie, Feb. 10, pp. 20.

Helmig D., Klein W., Koerdel W., Müller J., and Spurny K.R. (1988) Organische Chemikalien in der Waldatmosphäre. FhG-Berichte 4-88, Heft Umwelt II, 41-43 (in German).

Helmig D., Hauptmann A., Jackwerth E., and Rehren Th. (1988) Chemische und mineralogische Untersuchungen zur frühbronzezeitlichen Kupferverhüttung in Shahr-i Sokhta/ Iran. In: Archaeomettallurgie von Kupfer und Eisen, Jb. Röm. Germ. Zentralmuseum 35, pp. 522-525, Mainz, (in German).

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Submitted Papers

 

Rossabi S. and Helmig D. (2017) Changes in atmospheric butanes and pentanes and their isomeric ratios in the continental United States. Submitted for publication.

 

Feldman D.R., Collins W.D., Biraud S.C., Risser M.D., Turner D.D., Gero P.J., Tadić J., Helmig D., Xie S., Mlawer E.J., Shippert T.R., and Torn M.S. (2017) First observation of CH4 surface radiative forcing and its thermodynamic dependence. Submitted for publication.

 

Dalsøren S.B., Myhre G., Hodnebrog Ø., Myhre C.L., Stohl A., Pisso I., Schwietzke S., Höglund-Isaksson L., Helmig D., Reimann S., Sauvage S., Schmidbauer N., Read K.A., Carpenter L.J., Lewis A.C., Punjabi S., and Wallasch M. (2017) Ethane and propane emissions substantially underestimated in community emission datasets. Submitted for publication.

 

Sanyal S., Wuebbles D.J., Olsen S.C., Mazzoleni L., Mazzoleni C., Helmig D., and Fialho P. (2017) Modeling CO, O3, and BC in North Atlantic free troposphere after long range transport and impact of North American outflow on pollutant concentration in Pico. Submitted for publication.


Schultz M.G., Schröder S., Lyapina O., Cooper O., Galbally I., Petropavlovskikh I., Schneidemesser E.v., Tanimoto H., Elshorbany Y., Naja M., Seguel R.J., Dauert U., Eckhardt P., Feigenspan S., Fiebig M., Hjellbrekke A.-G., Hong Y.-D., Kjeld P.C., Koide H., Lear G., Tarasick D., Ueno M., Wallasch M., Baumgardner D., Chuang M.-T., Gillett R., Lee M., Molloy S., Moolla R., Wang T., Sharps K., Adame J.A., Ancellet G., Apadula F., Artaxo P., Barlasina M.E., Bogucka M., Bonasoni P., Chang L., Colomb A., Cuevas E., Cupeiro M., Degorska A., Ding A., Fröhlich M., Frolova M., Gadhavi H., Gheusi F., Gilge S., Gonzalez M.Y., Gros V., Hamad S.H., Helmig D., Henriques D., Hermansen O., Holla R., Hueber J., Im U., Jaffe D.A., Komala N., Kubistin D., Lam K.-S., Laurila T., Lee H., Levy I., Mazzoleni C., Mazzoleni L., McClure-Begley A., Mohamad M., Murovec M., Navarro-Comas M., Nicodim F., Parrish D., Read K.A., Reid N., Ries L., Saxena P., Schwab J.J., Scorgie Y., Senik I., Simmonds P., Sinha V., Skorokhod A.I., Spain G., Spangl W., Spoor R., Springston S.R., Steer K., Steinbacher M., Suharguniyawan E., Torre P., Trickl T., Weili L., Weller R., Xiaobin X., Xue L., and Zhiqiang M. (2017) Tropospheric Ozone Assessment Report: Database and Metrics Data of Global Surface Ozone Observations. Submitted for publication.


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Papers in Preparation

 

Murray K., Kramer L., Doskey P., Ganzeveld L., Seok B., Van Dam B., and Helmig D. (2017) Dynamics of ozone and nitrogen oxides at Summit, Greenland. III. Simulating temporal variations of snowpack chemistry with a 1-D Process-Scale Model. Manuscript in preparation.

 

Wang W., Park J.-H., Guenther A., and Helmig D. (2017) Ozone reactivity of biogenic volatile organic emissions during SOAS. Manuscript in preparation.

 

Helmig D., Park J.-H., and Guenther A. (2017) Ozone reactivity measurement of biogenic volatile organic emissions. Manuscript in preparation.

 

Kumar S., Fialho P., Mazzoleni L.R., Owen R.C., Helmig D., Dzioback M., Hueber J., Dzepina K., and Mazzoleni C. (2017) Analysis of eleven years of measurements of North Atlantic black carbon equivalent concentrations at the Pico Mountain Observatory, Azores. Manuscript in preparation.


Dzepina K., Roberts J.M., Mazzoleni L.R., Dziobak M.P., Owen R.C., Val Martin M., Kramer L., Fisher E.V., Fialho P., Hueber J., Helmig D., Mazzoleni C., and Honrath R.E. (2017) Observations of peroxyacetic nitric anhydride (PAN) and peroxypropionic nitric anhydride (PPN) at the Pico Mountain Observatory during Spring and Summer of 2008 and 2009.  Manuscript in preparation.


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Patents

Helmig D. Gas concentration and injection system for gas chromatographic analysis of organic trace gases. U.S. Patent #5563352, October 1996.

Helmig D., Schwarzer N., and Steinhanses J. Schaltungsanordnung zur Betriebsüberwachung eines Flammenionisations-Detektors und Verfahren hierfür. Patent der FhG, Deutsches Patentamt, 6.4.1990, Amtsaktenzeichen 40 11 301.9. Suspended in 1994.

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Research Reports

World Meteorological Organization Global Atmosphere Watch Report No. 171. A WMO/GAW Expert Workshop on Global Long-Term Measurements of Volatile Organic Compounds (VOCs), Geneva, Switzerland, 30 January to 1 February 2006, February 2007, WMO TD No. 1373, 36 pp. (link to report)

Helmig D., Birks J., Balsley B., Karbiwnyk C. and Mills C. (2001) Measurements of non-methane volatile organic compounds in the lower troposphere from tethered balloon and kite sampling platforms by internal standard calibration using ambient CFC reference compounds. US Environmental Protection Agency. Analytical and Monitoring Methods/4A Field Analytical Methods.  Contract Number GR825417-01-0, March.

Helmig D., David D., Birks J. and Boulter J. (2001) Vertical profiling of ozone within the planetary boundary layer at Summit/Greenland. National Science Foundation. Office of Polar Programs, Contract Number OPP-0000994, February.

Arey J., Atkinson R., Harger W.P., Helmig D. and Sasaki J. (1994) Formation of mutagens from the atmospheric photooxidations of PAH and their occurrence in ambient air. Draft Final Report to the California Air Resources Board and the California Environmental Protection Agency, Contract Number A132-075, February.

Atkinson R., Arey J., Harger W.P., Helmig D. and McElroy P.A. (1991) Hydroxynitro-PAH and other PAH derivatives in California's atmosphere and their contribution to ambient mutagenicity. Draft Final Report to the California Air Resources Board, Contract No. A732-154, April.

Klein W., Kördel W., Helmig D., Spurny K., Müller J., Bauer A., Jürling H., Iburg J., Fritsche W. (1989) Physikalische und chemische Charakterisierung des Waldaerosols. Forschungsbericht an das Ministerium für Umwelt und Raumplanung Nordrhein-Westfalen.

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