(with selected brief summaries of contents and selected links to abstracts)
Van Dam B. and Helmig D. (2012) Comments on 'Possible contribution of triboelectricity to snow-air interactions'. Environ. Chem. article pdf
Helmig, D., E. K. Lang, L. Bariteau, P. Boylan, C. W. Fairall, L. Ganzeveld, J. E. Hare, J. Hueber, and M. Pallandt (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 Discuss., 9, 3145-3172
Fairall, C. W., M. Yang, L. Bariteau, J. B. Edson, D. Helmig, W. McGillis, S. Pezoa, J. E. Hare, B. Huebert, and B. Blomquist (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.
(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.
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.
(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.
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. article pdf
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.
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. article pdf
Brodin M., Helmig D., and Oltmans S.J. (2010) Seasonal ozone behavior along
an elevation gradient in the
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.
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. article pdf
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.
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. article pdf
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.
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. article pdf
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. article pdf
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. article pdf
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. 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.
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. pdf article
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. 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. 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. 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. 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. 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. 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. 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.
Helmig D. (1999) Review: Gas chromatography air analysis. J. Chrom. 843, 129-146. 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. 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. 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. 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. 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.
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.
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.
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.
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).
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.
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.
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.
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., 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. Abstract
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.
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.
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.
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. Abstract
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.
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).
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 and implications for methane. Nature, submitted for publication.
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. (2011) A one-dimensional model study of individual reactive biogenic volatile organic compounds and their contributions to organic nitrates above a mixed forest. Atmos. Chem. Phys. Discus., submitted for publication.
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.
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. report pdf
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.