Current Research Projects:

  • Development of Ship-Borne Eddy Correlation Ozone Flux Measurements (Abstract)  See the website
  • A synthesis of existing and new observations of air-snowpack exchanges to assess the Arctic Troposspheric Ozone Budget
  • Investigation of ozone photochemistry in lower free troposphere continental outflow traveling over the North Atlantic
  • Air-sea gas transfer over the Southern Ocean in GasEx III
  • A study of biomass burning and anthropogenic impacts on Arctic tropospheric chemistry using measurements at Summit, Greenland, as part of the POLARCAT International Polar Year Project
  • Sesquiterpene Emissions from Vegetation: Sesquiterpene Emissions from Natural, Urban and Agricultural Vegetation in the United States (Abstract)
  • Global NMHC distribution from the NOAA Cooperative Air Sampling Network
  • Ozone distrubution in the Colorado Front Range
  • Study atmospheric chemisty-boundary layer meteorology connections in a polar coastal environment during the OASIS (Ocean-Atmosphere-Sea Ice-Snowpack Interactions in Polar Regions) 2009 experiment in Barrow, Alaska.
flux tower at Summitfast ozone instrument on the ship

Recent Poster Presentations:

Trees and VOCs:Measuring volatile organic compounds from urban forests, 2010: R Daly, D Helmig.

Measurements of near surface ozone at Summit, Greenland, using an automated moving inlet system, 2009: B.A. VanDam, D. Helmig, R.E. Honrath, J. Hueber, B. Seok, L. Kramer, C. Toro, L. Ganzeveld

Boundary Layer Ozone Dynamics during the Spring 2009 OASIS Experiment in Barrow, AK, 2009: P. Boylan, D. Helmig, J. Booth, F.M. Flocke, B.J. Johnson, D.J. Knapp, D.D. Montzka, S.J. Oltmans, A.J. Weinheimer, W. Zheng

Interannual and seasonal variability of biomass-burning and anthropogenic emmissions at Summit, Greenland, 2009: L.J. Kramer, R.E. Honrath, D. Helmig, J. Hueber, S. Oltmans, R. Schnell, J Burkhart, A. Stohl

Seasonal Variations of Nitrogen Oxides in snowpack air at Summit, Greenland, 2009: C. Toro, R.E. Honrath, L.J. Kramer, D. Helmig, B.A. VanDam, B. Seok, J. Hueber, L. Ganzeveld, P.V. Doskey

Ozone fluxes over the ocean: First ship-borne flux measurements and data interpretations from tropical to polar oceans, 2008: D. Helmig, L. Bariteau, L. Ganzeveld, C. Fairall, J. Hare, J. Hueber, E.K. Lang, D. Wolfe

Oxidized Carbon and Nitrogen Exchanges Through the Seasonal Snowpack at the University of Michigan Biological Station and their Contribution to the Annual Ecosystem Gas Exchange Budget, 2008: B. Seok, D. Helmig., M. Williams, C. Vogel, P. Curtis

Carbon Dioxide Gas Exchange Through the Snowpack and its Contribution to the Ecosystem Carbon Budget in a High-Elevation Subalpine Forest, 2007: B. Seok, D. Liptzin, K. Chowanski, J. Hueber, M. Williams, D. Helmig.

Study of Diurnal and Seasonal Variations of Sesquiterpene and Monoterpene Emissions from Vegetation, 2007: R. Daly, D. Helmig, D. Tanner, A. Guenther.

Understanding Air Toxics at the Urban/Mountain Interface in Boulder County, Colorado, 2007: A. Eisele, M. Hanningan, D. Helmig, J. Milford, P. Milmoe, D. Tanner.

Ship-borne Ozone Flux Measurements during TexAQS 2006, 2007: L. Bariteau, D. Helmig, C. W. Fairall, J. Hueber, D. Wolfe, L. Ganzveld.

The Contribution of Sesquiterpenes to Atmospheric Secondary Organic Aerosol (SOA), 2007: T. Sakulyanontvittya, J. Milford, C. Wiedinmyer, A. Guenther, P. Harley, D. Helmig, T. Duhl, J. Pollmann, J. Ortega, D. Tanner, J. Herrick.

The development of Model of Emissions of Gases and Aerosols from Nature (MEGAN2.0): Inclusion of Sesquiterpenes, 2007: T. Sakulyanontvittya, C. Wiedinmyer, A. Guenther, J. Milford, D. Helmig, S. Matsunaga, M. Potosnak, and P. Harley.

Effect of Snow Cover on Atmosphere-Surface Gas Exchange in Mid-Latitude and High-Latitude Environments, 2006: B. Seok, D. Helmig, F. Bocquet, J. Hueber, T. Morse, K. Chowanski, M. Williams.

Non Methane Hydrocarbon Measurement for Long Range Transport Studies at Pico Mountain, Azores, Portugal, 2005: D. Tanner, D. Helmig, R. Honrath.

Introduction of a newly developped GC system for VOC analysis in the CMDL network flasks, 2005: J. Pollmann, J. Levieveld, P. Tans and D. Helmig

Ozone Deposition to Polar and Midlatitude Snowpacks, 2004:  D. Helmig, F. Bocquet, L. Cohen, L. Ganzeveld, S. Oltmans and U. Rick.

Ozone Uptake to Polar and Midlatitude Snowpacks, 2004: F. Bocquet, U. Rick, L. Cohen,  M. Losleben, S. Oltmans and D. Helmig

North Atlantic Long Range Transport Research at Pico Mountain, Azores, Portugal, 2004: D. Helmig, R. Honrath, D. Tanner, M. Val Martin, R. C. Owen and J. Kleissl.

Development of a New Method for the Study of the Global Distribution of the OH-Radical, 2004: J. Pollmann, J. Levieveld and D. Helmig

Biogenic Sesquiterpene Emission Literature Review on Temperature and Light Dependencies, 2004: T. Duhl, A. Guenther, C. Wiedinmeyer, J. Milford and D. Helmig.

Mitigation Techniques for Ozone Interferences in Atmospheric Sesquiterpene Analysis, 2004: J. Pollmann, J. Ortega, C. Dolliver and D. Helmig.

Which Processes Determine Ozone Atmosphere-Surface Fluxes over Snow?, 2003:  D. Helmig, F. Bocquet, J. D. Fuentes, S. J. Oltmans and D. W. Tarasick

Biogenic Volatile Organic Compound Fluxes: Evaluation of the Enclosure Technique and Comparison with Eddy Correlation Methods, 2003: J. Ortega, D. Helmig, A. Guenther, S. Pressley and B. Lamb

Sesquiterpene Emissions from Vegetation -Development of Analysis Techniques for Enclosure and Ambient Measurements, 2002: F. Bocquet, T. Revermann, J. Pollmann, A. Jimenez, O. Kaltschmidt, D. Helmig

Sesquiterpene Emissions from Vegetation, 2002:  A. Jimenez, D. Helmig

Vertical Profile Measurements of Atmospheric Non-Methane Volatile Organic Compounds Using Ambient CFC Reference Compounds, 2000: C. Karbiwnyk, C. Mills, J. Birks, D. Helmig

Development of a Periodic Eddy Covariance System for the Flux Measurement of Biogenic VolatileOrganic Compounds Using in-situ Ion Trap Mass Spectrometer Detection, 2000:  J. Ruppert, J. Rinne, A. Delany, A.Guenther, J. Birks, D. Helmig

Vertical Profiles of Ozone, Water Vapor, Meteorological Parameters and Boundary-Layer Conditions at Summit, Greenland, During June 2000, 2001: J.G. Alfieri, D. Helmig, J. Boulter, D. David, J. Birks, N. Cullen, K. Steffen, B. Johnson, S. Oltmans

Eddy Correlation Flux Measurements of Volatile Organic Compounds by Disjunct Eddy Sampling and Ion Trap Mass Spectrometry Analysis, 2001:  J. Ortega, J. Ruppert, D. Helmig