Detlev Helmig - Publications

University of Colorado, Boulder, Boulder, CO, United States 
Atmospheric Science Physics, Analytical Chemistry

135 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2016 Angot H, Magand O, Helmig D, Ricaud P, Quennehen B, Gallée H, Del Guasta M, Sprovieri F, Pirrone N, Savarino J, Dommergue A. New insights into the atmospheric mercury cycling in central Antarctica and implications on a continental scale Atmospheric Chemistry and Physics. 16: 8249-8264. DOI: 10.5194/Acp-16-8249-2016  0.76
2016 Legrand M, Preunkert S, Savarino J, Frey MM, Kukui A, Helmig D, Jourdain B, Jones AE, Weller R, Brough N, Gallée H. Inter-annual variability of surface ozone at coastal (Dumont d'Urville, 2004-2014) and inland (Concordia, 2007-2014) sites in East Antarctica Atmospheric Chemistry and Physics. 16: 8053-8069. DOI: 10.5194/Acp-16-8053-2016  0.76
2016 Helmig D, Rossabi S, Hueber J, Tans P, Montzka SA, Masarie K, Thoning K, Plass-Duelmer C, Claude A, Carpenter LJ, Lewis AC, Punjabi S, Reimann S, Vollmer MK, Steinbrecher R, et al. Reversal of global atmospheric ethane and propane trends largely due to US oil and natural gas production Nature Geoscience. 9: 490-495. DOI: 10.1038/Ngeo2721  0.76
2016 Schnell RC, Johnson BJ, Oltmans SJ, Cullis P, Sterling C, Hall E, Jordan A, Helmig D, Petron G, Ahmadov R, Wendell J, Albee R, Boylan P, Thompson CR, Evans J, et al. Quantifying wintertime boundary layer ozone production from frequent profile measurements in the Uinta Basin, UT, oil and gas region Journal of Geophysical Research: Atmospheres. DOI: 10.1002/2016Jd025130  0.76
2016 Van Dam B, Helmig D, Doskey PV, Oltmans SJ. Summertime surface O3 behavior and deposition to tundra in the Alaskan Arctic Journal of Geophysical Research: Atmospheres. 121: 8055-8066. DOI: 10.1002/2015Jd023914  0.76
2015 Kramer LJ, Helmig D, Burkhart JF, Stohl A, Oltmans S, Honrath RE. Seasonal variability of atmospheric nitrogen oxides and non-methane hydrocarbons at the GEOSummit station, Greenland Atmospheric Chemistry and Physics. 15: 6827-6849. DOI: 10.5194/Acp-15-6827-2015  0.76
2015 Emmons LK, Arnold SR, Monks SA, Huijnen V, Tilmes S, Law KS, Thomas JL, Raut JC, Bouarar I, Turquety S, Long Y, Duncan B, Steenrod S, Strode S, Flemming J, ... ... Helmig D, et al. The POLARCAT Model Intercomparison Project (POLMIP): Overview and evaluation with observations Atmospheric Chemistry and Physics. 15: 6721-6744. DOI: 10.5194/Acp-15-6721-2015  0.76
2015 Preunkert S, Legrand M, Frey MM, Kukui A, Savarino J, Gallée H, King M, Jourdain B, Vicars W, Helmig D. Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer Atmospheric Chemistry and Physics. 15: 6689-6705. DOI: 10.5194/Acp-15-6689-2015  0.76
2015 Dzepina K, Mazzoleni C, Fialho P, China S, Zhang B, Owen RC, Helmig D, Hueber J, Kumar S, Perlinger JA, Kramer LJ, Dziobak MP, Ampadu MT, Olsen S, Wuebbles DJ, et al. Molecular characterization of free tropospheric aerosol collected at the Pico Mountain Observatory: A case study with a long-range transported biomass burning plume Atmospheric Chemistry and Physics. 15: 5047-5068. DOI: 10.5194/Acp-15-5047-2015  0.76
2015 Ahmadov R, McKeen S, Trainer M, Banta R, Brewer A, Brown S, Edwards PM, De Gouw JA, Frost GJ, Gilman J, Helmig D, Johnson B, Karion A, Koss A, Langford A, et al. Understanding high wintertime ozone pollution events in an oil- and natural gas-producing region of the western US Atmospheric Chemistry and Physics. 15: 411-429. DOI: 10.5194/Acp-15-411-2015  0.76
2015 Lawson SJ, Selleck PW, Galbally IE, Keywood MD, Harvey MJ, Lerot C, Helmig D, Ristovski Z. Seasonal in situ observations of glyoxal and methylglyoxal over the temperate oceans of the Southern Hemisphere Atmospheric Chemistry and Physics. 15: 223-240. DOI: 10.5194/Acp-15-223-2015  0.76
2015 Liptzin D, Helmig D, Schmidt SK, Seok B, Williams MW. Winter gas exchange between the atmosphere and snow-covered soils on Niwot Ridge, Colorado, USA Plant Ecology and Diversity. DOI: 10.1080/17550874.2015.1065925  0.76
2015 Van Dam B, Helmig D, Toro C, Doskey P, Kramer L, Murray K, Ganzeveld L, Seok B. Dynamics of ozone and nitrogen oxides at Summit, Greenland: I. Multi-year observations in the snowpack Atmospheric Environment. 123: 268-284. DOI: 10.1016/J.Atmosenv.2015.09.060  0.76
2015 Murray KA, Kramer LJ, Doskey PV, Ganzeveld L, Seok B, Van Dam B, Helmig D. 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 Atmospheric Environment. 117: 110-123. DOI: 10.1016/J.Atmosenv.2015.07.004  0.76
2015 Hu L, Millet DB, Baasandorj M, Griffis TJ, Turner P, Helmig D, Curtis AJ, Hueber J. Isoprene emissions and impacts over an ecological transition region in the U.S. Upper Midwest inferred from tall tower measurements Journal of Geophysical Research D: Atmospheres. 120: 3553-3571. DOI: 10.1002/2014Jd022732  0.76
2015 China S, Scarnato B, Owen RC, Zhang B, Ampadu MT, Kumar S, Dzepina K, Dziobak MP, Fialho P, Perlinger JA, Hueber J, Helmig D, Mazzoleni LR, Mazzoleni C. Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties Geophysical Research Letters. 42: 1243-1250. DOI: 10.1002/2014Gl062404  0.76
2014 Edwards PM, Brown SS, Roberts JM, Ahmadov R, Banta RM, deGouw JA, Dubé WP, Field RA, Flynn JH, Gilman JB, Graus M, Helmig D, Koss A, Langford AO, Lefer BL, et al. High winter ozone pollution from carbonyl photolysis in an oil and gas basin. Nature. 514: 351-4. PMID 25274311 DOI: 10.1038/Nature13767  0.76
2014 Trowbridge AM, Daly RW, Helmig D, Stoy PC, Monson RK. Herbivory and climate interact serially to control monoterpene emissions from pinyon pine forests. Ecology. 95: 1591-603. PMID 25039223 DOI: 10.1890/13-0989.1  0.76
2014 Helmig D, Thompson CR, Evans J, Boylan P, Hueber J, Park JH. Highly elevated atmospheric levels of volatile organic compounds in the Uintah Basin, Utah. Environmental Science & Technology. 48: 4707-15. PMID 24624890 DOI: 10.1021/Es405046R  0.76
2014 Rhoderick GC, Duewer DL, Apel E, Baldan A, Hall B, Harling A, Helmig D, Heo GS, Hueber J, Kim ME, Kim YD, Miller B, Montzka S, Riemer D. International comparison of a hydrocarbon gas standard at the picomol per mol level. Analytical Chemistry. 86: 2580-9. PMID 24555659 DOI: 10.1021/Ac403761U  0.76
2014 Boylan P, Helmig D, Park JH. Characterization and mitigation of water vapor effects in the measurement of ozone by chemiluminescence with nitric oxide Atmospheric Measurement Techniques. 7: 1231-1244. DOI: 10.5194/Amt-7-1231-2014  0.76
2014 Zhang B, Owen RC, Perlinger JA, Kumar A, Wu S, Val Martin M, Kramer L, Helmig D, Honrath RE. A semi-Lagrangian view of ozone production tendency in North American outflow in the summers of 2009 and 2010 Atmospheric Chemistry and Physics. 14: 2267-2287. DOI: 10.5194/Acp-14-2267-2014  0.76
2014 Helmig D, Petrenko V, Martinerie P, Witrant E, Röckmann T, Zuiderweg A, Holzinger R, Hueber J, Thompson C, White JWC, Sturges W, Baker A, Blunier T, Etheridge D, Rubino M, et al. Reconstruction of Northern Hemisphere 1950–2010 atmospheric non-methane hydrocarbons Atmospheric Chemistry and Physics. 14: 1463-1483. DOI: 10.5194/Acp-14-1463-2014  0.76
2014 Curtis AJ, Helmig D, Baroch C, Daly R, Davis S. Biogenic volatile organic compound emissions from nine tree species used in an urban tree-planting program Atmospheric Environment. 95: 634-643. DOI: 10.1016/J.Atmosenv.2014.06.035  0.76
2014 Helmig D, Stephens CR, Caramore J, Hueber J. Seasonal behavior of non-methane hydrocarbons in the firn air at Summit, Greenland Atmospheric Environment. 85: 234-246. DOI: 10.1016/J.Atmosenv.2013.11.021  0.76
2014 Pétron G, Karion A, Sweeney C, Miller BR, Montzka SA, Frost GJ, Trainer M, Tans P, Andrews A, Kofler J, Helmig D, Guenther D, Dlugokencky E, Lang P, Newberger T, et al. A new look at methane and nonmethane hydrocarbon emissions from oil and natural gas operations in the Colorado Denver-Julesburg Basin Journal of Geophysical Research: Atmospheres. 119: 6836-6852. DOI: 10.1002/2013Jd021272  0.76
2014 Boylan P, Helmig D, Staebler R, Turnipseed A, Fairall C, Neff W. Boundary layer dynamics during the Ocean-Atmosphere-Sea-Ice-Snow (OASIS) 2009 experiment at Barrow, AK Journal of Geophysical Research Atmospheres. 119: 2261-2278. DOI: 10.1002/2013Jd020299  0.76
2013 Helmig D, Daly RW, Milford J, Guenther A. Seasonal trends of biogenic terpene emissions. Chemosphere. 93: 35-46. PMID 23827483 DOI: 10.1016/J.Chemosphere.2013.04.058  0.76
2013 Edwards PM, Young CJ, Aikin K, DeGouw J, Dubé WP, Geiger F, Gilman J, Helmig D, Holloway JS, Kercher J, Lerner B, Martin R, McLaren R, Parrish DD, Peischl J, et al. Ozone photochemistry in an oil and natural gas extraction region during winter: Simulations of a snow-free season in the Uintah Basin, Utah Atmospheric Chemistry and Physics. 13: 8955-8971. DOI: 10.5194/Acp-13-8955-2013  0.76
2013 Seok B, Helmig D, Ganzeveld L, Williams MW, Vogel CS. Dynamics of nitrogen oxides and ozone above and within a mixed hardwood forest in northern Michigan Atmospheric Chemistry and Physics. 13: 7301-7320. DOI: 10.5194/Acp-13-7301-2013  0.76
2013 Palmer PI, Parrington M, Lee JD, Lewis AC, Rickard AR, Bernath PF, Duck TJ, Waugh DL, Tarasick DW, Andrews S, Aruffo E, Bailey LJ, Barrett E, Bauguitte JBS, Curry KR, ... ... Helmig D, et al. Quantifying the impact of BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites (BORTAS) experiment: Design, execution and science overview Atmospheric Chemistry and Physics. 13: 6239-6261. DOI: 10.5194/Acp-13-6239-2013  0.76
2013 Hu L, Millet DB, Kim SY, Wells KC, Griffis TJ, Fischer EV, Helmig D, Hueber J, Curtis AJ. North American acetone sources determined from tall tower measurements and inverse modeling Atmospheric Chemistry and Physics. 13: 3379-3392. DOI: 10.5194/Acp-13-3379-2013  0.76
2013 Kumar A, Wu S, Weise MF, Honrath R, Owen RC, Helmig D, Kramer L, Val Martin M, Li Q. Free-troposphere ozone and carbon monoxide over the North Atlantic for 2001-2011 Atmospheric Chemistry and Physics. 13: 12537-12547. DOI: 10.5194/Acp-13-12537-2013  0.76
2013 Van Dam B, Helmig D, Neff W, Kramer L. Evaluation of boundary layer depth estimates at summit station, Greenland Journal of Applied Meteorology and Climatology. 52: 2356-2362. DOI: 10.1175/Jamc-D-13-055.1  0.76
2013 Van Dam B, Helmig D, Burkhart JF, Obrist D, Oltmans SJ. Springtime boundary layer O<inf>3</inf> and GEM depletion at Toolik Lake, Alaska Journal of Geophysical Research Atmospheres. 118: 3382-3391. DOI: 10.1002/Jgrd.50213  0.76
2012 Simpson IJ, Sulbaek Andersen MP, Meinardi S, Bruhwiler L, Blake NJ, Helmig D, Rowland FS, Blake DR. Long-term decline of global atmospheric ethane concentrations and implications for methane. Nature. 488: 490-4. PMID 22914166 DOI: 10.1038/Nature11342  0.76
2012 Baghi R, Helmig D, Guenther A, Duhl T, Daly R. Contribution of flowering trees to urban atmospheric biogenic volatile organic compound emissions Biogeosciences. 9: 3777-3785. DOI: 10.5194/Bg-9-3777-2012  0.76
2012 Bryan AM, Bertman SB, Carroll MA, Dusanter S, Edwards GD, Forkel R, Griffith S, Guenther AB, Hansen RF, Helmig D, Jobson BT, Keutsch FN, Lefer BL, Pressley SN, Shepson PB, et al. In-canopy gas-phase chemistry during CABINEX 2009: Sensitivity of a 1-D canopy model to vertical mixing and isoprene chemistry Atmospheric Chemistry and Physics. 12: 8829-8849. DOI: 10.5194/Acp-12-8829-2012  0.76
2012 Parrington M, Palmer PI, Henze DK, Tarasick DW, Hyer EJ, Owen RC, Helmig D, Clerbaux C, Bowman KW, Deeter MN, Barratt EM, Coheur PF, Hurtmans D, Jiang Z, George M, et al. The influence of boreal biomass burning emissions on the distribution of tropospheric ozone over North America and the North Atlantic during 2010 Atmospheric Chemistry and Physics. 12: 2077-2098. DOI: 10.5194/Acp-12-2077-2012  0.76
2012 Pratt KA, Mielke LH, Shepson PB, Bryan AM, Steiner AL, Ortega J, Daly R, Helmig D, Vogel CS, Griffith S, Dusanter S, Stevens PS, Alaghmand M. Contributions of individual reactive biogenic volatile organic compounds to organic nitrates above a mixed forest Atmospheric Chemistry and Physics. 12: 10125-10143. DOI: 10.5194/Acp-12-10125-2012  0.76
2012 Duhl TR, Guenther A, Helmig D. Estimating urban vegetation cover fraction using Google Earth® images Journal of Land Use Science. 7: 311-329. DOI: 10.1080/1747423X.2011.587207  0.76
2012 Van Dam B, Helmig D. Comments on 'Possible contribution of triboelectricity to snowair interactions' Environmental Chemistry. 9: 116-118. DOI: 10.1071/En11151  0.76
2012 Helmig D, Boylan P, Johnson B, Oltmans S, Fairall C, Staebler R, Weinheimer A, Orlando J, Knapp DJ, Montzka DD, Flocke F, Frieó U, Sihler H, Shepson PB. Ozone dynamics and snow-atmosphere exchanges during ozone depletion events at Barrow, Alaska Journal of Geophysical Research: Atmospheres. 117. DOI: 10.1029/2012Jd017531  0.76
2012 Helmig D, Lang EK, Bariteau L, Boylan P, Fairall CW, Ganzeveld L, Hare JE, Hueber J, Pallandt M. Atmosphere-ocean ozone fluxes during the TexAQS 2006, STRATUS 2006, GOMECC 2007, GasEx 2008, and AMMA 2008 cruises Journal of Geophysical Research Atmospheres. 117. DOI: 10.1029/2011Jd015955  0.76
2012 Boylan P, Helmig D, Lang EK, Bariteau L, Fairall CW, Ganzeveld L, Hare JE, Hueber J, Pallandt M. Biogeochemical and physical controls of atmosphere-ocean ozone fluxes during five research cruises European Space Agency, (Special Publication) Esa Sp. 703.  0.76
2011 Bocquet F, Helmig D, Van Dam BA, Fairall CW. Evaluation of the flux gradient technique for measurement of ozone surface fluxes over snowpack at Summit, Greenland Atmospheric Measurement Techniques. 4: 2305-2321. DOI: 10.5194/Amt-4-2305-2011  0.76
2011 Hu L, Millet DB, Mohr MJ, Wells KC, Griffis TJ, Helmig D. Sources and seasonality of atmospheric methanol based on tall tower measurements in the US Upper Midwest Atmospheric Chemistry and Physics. 11: 11145-11156. DOI: 10.5194/Acp-11-11145-2011  0.76
2011 Edson JB, Fairall CW, Bariteau L, Zappa CJ, Cifuentes-Lorenzen A, McGillis WR, Pezoa S, Hare JE, Helmig D. Direct covariance measurement of CO2 gas transfer velocity during the 2008 Southern Ocean Gas Exchange Experiment: Wind speed dependency Journal of Geophysical Research: Oceans. 116. DOI: 10.1029/2011Jc007022  0.76
2011 Grachev AA, Bariteau L, Fairall CW, Hare JE, Helmig D, Hueber J, Lang EK. Turbulent fluxes and transfer of trace gases from ship-based measurements during TexAQS 2006 Journal of Geophysical Research Atmospheres. 116. DOI: 10.1029/2010Jd015502  0.76
2011 Fairall CW, Yang M, Bariteau L, Edson JB, Helmig D, McGillis W, Pezoa S, Hare JE, Huebert B, Blomquist B. Implementation of the Coupled Ocean-Atmosphere Response Experiment flux algorithm with CO2, dimethyl sulfide, and O3 Journal of Geophysical Research: Oceans. 116. DOI: 10.1029/2010Jc006884  0.76
2011 Brodin M, Helmig D, Johnson B, Oltmans S. Comparison of ozone concentrations on a surface elevation gradient with balloon-borne ozonesonde measurements Atmospheric Environment. 45: 5431-5439. DOI: 10.1016/J.Atmosenv.2011.07.002  0.76
2011 Boylan PJ, Helmig D, Staebler RM, Fairall CW, Hueber J. Ozone snow-atmosphere exchange during ozone depletion events in arctic springtime at Barrow, AK Acs National Meeting Book of Abstracts 0.76
2010 Bariteau L, Helmig D, Fairall CW, Hare JE, Hueber J, Lang EK. Determination of oceanic ozone deposition by ship-borne eddy covariance flux measurements Atmospheric Measurement Techniques. 3: 441-455. DOI: 10.5194/Amt-3-441-2010  0.76
2010 Pozzer A, Pollmann J, Taraborrelli D, Jöckel P, Helmig D, Tans P, Hueber J, Lelieveld J. Observed and simulated global distribution and budget of atmospheric C 2-C5 alkanes Atmospheric Chemistry and Physics. 10: 4403-4422. DOI: 10.5194/Acp-10-4403-2010  0.76
2010 Brodin M, Helmig D, Oltmans S. Seasonal ozone behavior along an elevation gradient in the Colorado Front Range Mountains Atmospheric Environment. 44: 5305-5315. DOI: 10.1016/J.Atmosenv.2010.06.033  0.76
2009 Helmig D, Bottenheim J, Galbally IE, Lewis A, Milton MJT, Penkett S, Plass-Duelmer C, Reimann S, Tans P, Thiel S. Volatile organic compounds in the global atmosphere Eos. 90: 513-514. DOI: 10.1029/2009Eo520001  0.76
2009 Helmig D, Cohen LD, Bocquet F, Oltmans S, Grachev A, Neff W. Spring and summertime diurnal surface ozone fluxes over the polar snow at Summit, Greenland Geophysical Research Letters. 36. DOI: 10.1029/2008Gl036549  0.76
2009 Ganzeveld L, Helmig D, Fairall CW, Hare J, Pozzer A. Atmosphere-ocean ozone exchange: A global modeling study of biogeochemical, atmospheric, and waterside turbulence dependencies Global Biogeochemical Cycles. 23. DOI: 10.1029/2008Gb003301  0.76
2009 Williams MW, Helmig D, Blanken P. White on green: Under-snow microbial processes and trace gas fluxes through snow, Niwot Ridge, Colorado Front Range Biogeochemistry. 95: 1-12. DOI: 10.1007/S10533-009-9330-Z  0.76
2009 Helmig D, Apel E, Blake D, Ganzeveld L, Lefer BL, Meinardi S, Swanson AL. Release and uptake of volatile inorganic and organic gases through the snowpack at Niwot Ridge, Colorado Biogeochemistry. 95: 167-183. DOI: 10.1007/S10533-009-9326-8  0.76
2009 Helmig D, Seok B, Williams MW, Hueber J, Sanford R. Fluxes and chemistry of nitrogen oxides in the Niwot Ridge, Colorado, snowpack Biogeochemistry. 95: 115-130. DOI: 10.1007/S10533-009-9312-1  0.76
2009 Filippa G, Freppaz M, Williams MW, Helmig D, Liptzin D, Seok B, Hall B, Chowanski K. Winter and summer nitrous oxide and nitrogen oxides fluxes from a seasonally snow-covered subalpine meadow at Niwot Ridge, Colorado Biogeochemistry. 95: 131-149. DOI: 10.1007/S10533-009-9304-1  0.76
2009 Liptzin D, Williams MW, Helmig D, Seok B, Filippa G, Chowanski K, Hueber J. Process-level controls on CO2 fluxes from a seasonally snow-covered subalpine meadow soil, Niwot Ridge, Colorado Biogeochemistry. 95: 151-166. DOI: 10.1007/S10533-009-9303-2  0.76
2009 Seok B, Helmig D, Williams MW, Liptzin D, Chowanski K, Hueber J. 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. DOI: 10.1007/S10533-009-9302-3  0.76
2009 Kim S, Karl T, Helmig D, Daly R, Rasmussen R, Guenther A. Measurement of atmospheric sesquiterpenes by proton transfer reaction-mass spectrometry (PTR-MS) Atmospheric Measurement Techniques. 2: 99-112.  0.76
2008 Sakulyanontvittaya T, Guenther A, Helmig D, Milford J, Wiedinmyer C. Secondary organic aerosol from sesquiterpene and monoterpene emissions in the United States. Environmental Science & Technology. 42: 8784-90. PMID 19192798 DOI: 10.1021/Es800817R  0.76
2008 Ortega J, Helmig D, Daly RW, Tanner DM, Guenther AB, Herrick JD. Approaches for quantifying reactive and low-volatility biogenic organic compound emissions by vegetation enclosure techniques - part B: applications. Chemosphere. 72: 365-80. PMID 18471857 DOI: 10.1016/J.Chemosphere.2008.02.054  0.76
2008 Sakulyanontvittaya T, Duhl T, Wiedinmyer C, Helmig D, Matsunaga S, Potosnak M, Milford J, Guenther A. Monoterpene and sesquiterpene emission estimates for the United States. Environmental Science & Technology. 42: 1623-9. PMID 18441812 DOI: 10.1021/Es702274E  0.76
2008 Pollmann J, Helmig D, Hueber J, Plass-Dülmer C, Tans P. Sampling, storage, and analysis of C2-C7 non-methane hydrocarbons from the US National Oceanic and Atmospheric Administration Cooperative Air Sampling Network glass flasks. Journal of Chromatography. A. 1188: 75-87. PMID 18355832 DOI: 10.1016/J.Chroma.2008.02.059  0.76
2008 Ortega J, Helmig D. Approaches for quantifying reactive and low-volatility biogenic organic compound emissions by vegetation enclosure techniques - part A. Chemosphere. 72: 343-64. PMID 18279913 DOI: 10.1016/j.chemosphere.2007.11.020  0.76
2008 Barkley MP, Palmer PI, Kuhn U, Kesselmeier J, Chance K, Kurosu TP, Martin RV, Helmig D, Guenther A. Net ecosystem fluxes of isoprene over tropical South America inferred from Global Ozone Monitoring Experiment (GOME) observations of HCHO columns Journal of Geophysical Research: Atmospheres. 113. DOI: 10.1029/2008Jd009863  0.76
2008 Honrath RE, Helmig D, Owen RC, Parrish DD, Tanner DM. Nonmethane hydrocarbons at Pico Mountain, Azores: 2. Event-specific analyses of the impacts of mixing and photochemistry on hydrocarbon ratios Journal of Geophysical Research Atmospheres. 113. DOI: 10.1029/2008Jd009832  0.76
2008 Helmig D, Tanner DM, Honrath RE, Owen RC, Parrish DD. Nonmethane hydrocarbons at Pico Mountain, Azores: 1. Oxidation chemistry in the North Atlantic region Journal of Geophysical Research Atmospheres. 113. DOI: 10.1029/2007Jd008930  0.76
2008 Davis DD, Seelig J, Huey G, Crawford J, Chen G, Wang Y, Buhr M, Helmig D, Neff W, Blake D, Arimoto R, Eisele F. A reassessment of Antarctic plateau reactive nitrogen based on ANTCI 2003 airborne and ground based measurements Atmospheric Environment. 42: 2831-2848. DOI: 10.1016/J.Atmosenv.2007.07.039  0.76
2008 Eisele F, Davis DD, Helmig D, Oltmans SJ, Neff W, Huey G, Tanner D, Chen G, Crawford J, Arimoto R, Buhr M, Mauldin L, Hutterli M, Dibb J, Blake D, et al. Antarctic Tropospheric Chemistry Investigation (ANTCI) 2003 overview Atmospheric Environment. 42: 2749-2761. DOI: 10.1016/J.Atmosenv.2007.04.013  0.76
2008 Helmig D, Johnson BJ, Warshawsky M, Morse T, Neff WD, Eisele F, Davis DD. Nitric oxide in the boundary-layer at South Pole during the Antarctic Tropospheric Chemistry Investigation (ANTCI) Atmospheric Environment. 42: 2817-2830. DOI: 10.1016/J.Atmosenv.2007.03.061  0.76
2008 Johnson BJ, Helmig D, Oltmans SJ. Evaluation of ozone measurements from a tethered balloon-sampling platform at South Pole Station in December 2003 Atmospheric Environment. 42: 2780-2787. DOI: 10.1016/J.Atmosenv.2007.03.043  0.76
2008 Neff W, Helmig D, Grachev A, Davis D. A study of boundary layer behavior associated with high NO concentrations at the South Pole using a minisodar, tethered balloon, and sonic anemometer Atmospheric Environment. 42: 2762-2779. DOI: 10.1016/J.Atmosenv.2007.01.033  0.76
2008 Oltmans SJ, Johnson BJ, Helmig D. Episodes of high surface-ozone amounts at South Pole during summer and their impact on the long-term surface-ozone variation Atmospheric Environment. 42: 2804-2816. DOI: 10.1016/J.Atmosenv.2007.01.020  0.76
2008 Helmig D, Johnson B, Oltmans SJ, Neff W, Eisele F, Davis DD. Elevated ozone in the boundary layer at South Pole Atmospheric Environment. 42: 2788-2803. DOI: 10.1016/J.Atmosenv.2006.12.032  0.76
2008 Duhl TR, Helmig D, Guenther A. Sesquiterpene emissions from vegetation: A review Biogeosciences. 5: 761-777.  0.76
2008 Eisele AP, Hannigan MP, Milford JB, Helmig D, Milmoe PH. Understanding air toxics and carbonyl pollutant sources at the urban/mountain interface in Boulder County, Colorado Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, Awma. 4: 2037-2040.  0.76
2007 Helmig D, Ortega J, Duhl T, Tanner D, Guenther A, Harley P, Wiedinmyer C, Milford J, Sakulyanontvittaya T. Sesquiterpene emissions from pine trees--identifications, emission rates and flux estimates for the contiguous United States. Environmental Science & Technology. 41: 1545-53. PMID 17396639 DOI: 10.1021/Es0618907  0.76
2007 Fairall CW, Helmig D, Ganzeveld L, Hare J. Water-side turbulence enhancement of ozone deposition to the ocean Atmospheric Chemistry and Physics. 7: 443-451. DOI: 10.5194/Acp-7-443-2007  0.76
2007 Grannas AM, Jones AE, Dibb J, Ammann M, Anastasio C, Beine HJ, Bergin M, Bottenheim J, Boxe CS, Carver G, Chen G, Crawford JH, Dominé F, Frey MM, Guzmán MI, ... ... Helmig D, et al. An overview of snow photochemistry: Evidence, mechanisms and impacts Atmospheric Chemistry and Physics. 7: 4329-4373. DOI: 10.5194/Acp-7-4329-2007  0.76
2007 Helmig D, Ganzeveld L, Butler T, Oltmans SJ. The role of ozone atmosphere-snow gas exchange on polar, boundary-layer tropospheric ozone - A review and sensitivity analysis Atmospheric Chemistry and Physics. 7: 15-30. DOI: 10.5194/Acp-7-15-2007  0.76
2007 Bocquet F, Helmig D, Oltmans SJ. Ozone in interstitial air of the mid-latitude, seasonal snowpack at Niwot Ridge, Colorado Arctic, Antarctic, and Alpine Research. 39: 375-387. DOI: 10.1657/1523-0430(06-027)[Boquet]2.0.Co;2  0.76
2007 Kleissl J, Honrath RE, Dziobak MP, Tanner D, Val Martín M, Owen RC, Helmig D. Occurrence of upslope flows at the Pico mountaintop observatory: A case study of orographic flows on a small, volcanic island Journal of Geophysical Research Atmospheres. 112. DOI: 10.1029/2006Jd007565  0.76
2007 Ortega J, Helmig D, Guenther A, Harley P, Pressley S, Vogel C. Flux estimates and OH reaction potential of reactive biogenic volatile organic compounds (BVOCs) from a mixed northern hardwood forest Atmospheric Environment. 41: 5479-5495. DOI: 10.1016/J.Atmosenv.2006.12.033  0.76
2007 Dibb JE, Albert M, Anastasio C, Atlas E, Beyersdorf AJ, Blake NJ, Blake DR, Bocquet F, Burkhart JF, Chen G, Cohen L, Conway TJ, Courville Z, Frey MM, Friel DK, ... ... Helmig D, et al. An overview of air-snow exchange at Summit, Greenland: Recent experiments and findings Atmospheric Environment. 41: 4995-5006. DOI: 10.1016/J.Atmosenv.2006.12.006  0.76
2007 Helmig D, Oltmans SJ, Carlson D, Lamarque JF, Jones A, Labuschagne C, Anlauf K, Hayden K. A review of surface ozone in the polar regions Atmospheric Environment. 41: 5138-5161. DOI: 10.1016/J.Atmosenv.2006.09.053  0.76
2007 Cohen L, Helmig D, Neff WD, Grachev AA, Fairall CW. Boundary-layer dynamics and its influence on atmospheric chemistry at Summit, Greenland Atmospheric Environment. 41: 5044-5060. DOI: 10.1016/J.Atmosenv.2006.06.068  0.76
2007 Helmig D, Bocquet F, Cohen L, Oltmans SJ. Ozone uptake to the polar snowpack at Summit, Greenland Atmospheric Environment. 41: 5061-5076. DOI: 10.1016/J.Atmosenv.2006.06.064  0.76
2007 Helmig D, Oltmans SJ, Morse TO, Dibb JE. What is causing high ozone at Summit, Greenland? Atmospheric Environment. 41: 5031-5043. DOI: 10.1016/J.Atmosenv.2006.05.084  0.76
2006 Pollmann J, Helmig D, Hueber J, Tanner D, Tans PP. Evaluation of solid adsorbent materials for cryogen-free trapping-gas chromatographic analysis of atmospheric C2-C6 non-methane hydrocarbons. Journal of Chromatography. A. 1134: 1-15. PMID 17010353 DOI: 10.1016/J.Chroma.2006.08.050  0.76
2006 Tanner D, Helmig D, Hueber J, Goldan P. Gas chromatography system for the automated, unattended, and cryogen-free monitoring of C2 to C6 non-methane hydrocarbons in the remote troposphere. Journal of Chromatography. A. 1111: 76-88. PMID 16497314 DOI: 10.1016/J.Chroma.2006.01.100  0.76
2006 Helmig D, Ortega J, Guenther A, Herrick JD, Geron C. Sesquiterpene emissions from loblolly pine and their potential contribution to biogenic aerosol formation in the Southeastern US Atmospheric Environment. 40: 4150-4157. DOI: 10.1016/J.Atmosenv.2006.02.035  0.76
2005 Pollmann J, Ortega J, Helmig D. Analysis of atmospheric sesquiterpenes: sampling losses and mitigation of ozone interferences. Environmental Science & Technology. 39: 9620-9. PMID 16475343 DOI: 10.1021/Es050440W  0.76
2004 Helmig D, Revermann T, Hall B. Characterization of a pressurized C5-C16 hydrocarbon gas calibration standard for air analysis. Analytical Chemistry. 76: 6528-34. PMID 15538772 DOI: 10.1021/Ac049113H  0.76
2004 Helmig D, Bocquet F, Pollmann J, Revermann T. Analytical techniques for sesquiterpene emission rate studies in vegetation enclosure experiments Atmospheric Environment. 38: 557-572. DOI: 10.1016/J.Atmosenv.2003.10.012  0.76
2003 Helmig D, Revermann T, Pollmann J, Kaltschmidt O, Jiménez Hernádez A, Bocquet F, David D. Calibration system and analytical considerations for quantitative sesquiterpene measurements in air. Journal of Chromatography. A. 1002: 193-211. PMID 12885090 DOI: 10.1016/S0021-9673(03)00619-8  0.76
2003 Karbiwnyk CM, Mills CS, Helmig D, Birks JW. Use of chloroflurocarbons as internal standards for the measurement of atmospheric non-methane volatile organic compounds sampled onto solid adsorbent cartridges. Environmental Science & Technology. 37: 1002-7. PMID 12666932 DOI: 10.1021/Es025910Q  0.76
2002 Karbiwnyk CM, Mills CS, Helmig D, Birks JW. Minimization of water vapor interference in the analysis of non-methane volatile organic compounds by solid adsorbent sampling. Journal of Chromatography. A. 958: 219-29. PMID 12134819 DOI: 10.1016/S0021-9673(02)00307-2  0.76
2002 Helmig D, Boulter J, David D, Birks JW, Cullen NJ, Steffen K, Johnson BJ, Oltmans SJ. Ozone and meteorological boundary-layer conditions at Summit, Greenland, during 3-21 June 2000 Atmospheric Environment. 36: 2595-2608. DOI: 10.1016/S1352-2310(02)00129-2  0.76
2000 Wagner WP, Helmig D, Fall R. Isoprene biosynthesis in Bacillus subtilis via the methylerythritol phosphate pathway Journal of Natural Products. 63: 37-40. PMID 10650075 DOI: 10.1021/Np990286P  0.76
2000 Kuck LR, Smith T, Balsley BB, Helmig D, Conway TJ, Tans PP, Davis K, Jensen ML, Bognar JA, Arrieta RV, Rodriquez R, Birks JW. Measurements of landscape-scale fluxes of carbon dioxide in the Peruvian Amazon by vertical profiling through the atmospheric boundary layer Journal of Geophysical Research: Atmospheres. 105: 22137-22146. DOI: 10.1029/2000Jd900105  0.76
1999 Helmig D, Klinger LF, Guenther A, Vierling L, Geron C, Zimmerman P. Biogenic volatile organic compound emissions (BVOCs). II. Landscape flux potentials from three continental sites in the U.S Chemosphere. 38: 2189-2204. PMID 10101862 DOI: 10.1016/S0045-6535(98)00424-X  0.76
1999 Helmig D, Klinger LF, Guenther A, Vierling L, Geron C, Zimmerman P. Biogenic volatile organic compound emissions (BVOCs). I. Identifications from three continental sites in the U.S Chemosphere. 38: 2163-2187. PMID 10101861 DOI: 10.1016/S0045-6535(98)00425-1  0.76
1999 Guenther A, Archer S, Greenberg J, Harley P, Helmig D, Klinger L, Vierling L, Wildermuth M, Zimmerman P, Zitzer S. Biogenic hydrocarbon emissions and landcover/climate change in a subtropical savanna Physics and Chemistry of the Earth, Part B: Hydrology, Oceans and Atmosphere. 24: 659-667. DOI: 10.1016/S1464-1909(99)00062-3  0.76
1999 Greenberg JP, Guenther A, Zimmerman P, Baugh W, Geron C, Davis K, Helmig D, Klinger LF. Tethered balloon measurements of biogenic VOCs in the atmospheric boundary layer Atmospheric Environment. 33: 855-867. DOI: 10.1016/S1352-2310(98)00302-1  0.76
1999 Isebrands JG, Guenther AB, Harley P, Helmig D, Klinger L, Vierling L, Zimmerman P, Geron C. Volatile organic compound emission rates from mixed deciduous and coniferous forests in Northern Wisconsin, USA Atmospheric Environment. 33: 2527-2536. DOI: 10.1016/S1352-2310(98)00250-7  0.76
1999 Helmig D. Air analysis by gas chromatography Journal of Chromatography A. 843: 129-146. DOI: 10.1016/S0021-9673(99)00173-9  0.76
1998 Helmig D, Balsley B, Davis K, Kuck LR, Jensen M, Bognar J, Smith T, Arrieta RV, Rodríguez R, Birks JW. Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon Journal of Geophysical Research: Atmospheres. 103: 25519-25532. DOI: 10.1029/98Jd01023  0.76
1998 Serça D, Guenther A, Klinger L, Helmig D, Hereid D, Zimmerman P. Methyl bromide deposition to soils Atmospheric Environment. 32: 1581-1586. DOI: 10.1016/S1352-2310(97)00386-5  0.76
1998 Helmig D, Greenberg J, Guenther A, Zimmerman P, Geron C. Volatile organic compounds and isoprene oxidation products at a temperate deciduous forest site Journal of Geophysical Research Atmospheres. 103: 22397-22414.  0.76
1997 Helmig D. Ozone removal techniques in the sampling of atmospheric volatile organic trace gases Atmospheric Environment. 31: 3635-3651. DOI: 10.1016/S1352-2310(97)00144-1  0.76
1996 Helmig D. Gas chromatography mass spectrometry analysis of volatile organic trace gases at Mauna Loa Observatory, Hawaii Journal of Geophysical Research Atmospheres. 101: 14697-14710. DOI: 10.1029/96Jd00212  0.76
1996 Helmig D. Artifact-free preparation, storage and analysis of solid adsorbent sampling cartridges used in the analysis of volatile organic compounds in air Journal of Chromatography A. 732: 414-417. DOI: 10.1016/0021-9673(95)01376-8  0.76
1996 Guenther A, Greenberg J, Harley P, Helmig D, Klinger L, Vierling L, Zimmerman P, Geron C. Leaf, branch, stand and landscape scale measurements of volatile organic compound fluxes from U.S. woodlands Tree Physiology. 16: 17-24.  0.76
1995 Helmig D, Vierling L. Water Adsorption Capacity of the Solid Adsorbents Tenax TA, Tenax GR, Carbotrap, Carbotrap C, Carbosieve SIII, and Carboxen 569 and Water Management Techniques for the Atmospheric Sampling of Volatile Organic Trace Gases Analytical Chemistry. 67: 4380-4386. DOI: 10.1021/Ac00119A029  0.76
1995 Helmig D, Greenberg J. Artifact formation from the use of potassium‐iodide‐based ozone traps during atmospheric sampling of trace organic gases Journal of High Resolution Chromatography. 18: 15-18. DOI: 10.1002/Jhrc.1240180105  0.76
1994 Helmig D, Harger WP. OH radical-initiated gas-phase reaction products of phenanthrene Science of the Total Environment, The. 148: 11-21. DOI: 10.1016/0048-9697(94)90368-9  0.76
1994 Helmig D, Greenberg JP. Automated in situ gas chromatographic-mass spectrometric analysis of ppt level volatile organic trace gases using multistage solid-adsorbent trapping Journal of Chromatography A. 677: 123-132. DOI: 10.1016/0021-9673(94)80551-2  0.76
1994 Greenberg JP, Lee B, Helmig D, Zimmerman PR. Fully automated gas chromatograph-flame ionization detector system for the in situ determination of atmospheric nonmethane hydrocarbons at low parts per trillion concentration Journal of Chromatography A. 676: 389-398. DOI: 10.1016/0021-9673(94)80439-7  0.76
1993 Renner E, Rolle W, Helmig D. Comparison of computed and measured photooxidant concentrations at a forest site Chemosphere. 27: 881-898. DOI: 10.1016/0045-6535(93)90018-Z  0.76
1992 Helmig D, Arey J. Organic chemicals in the air at Whitaker's Forest/Sierra Nevada Mountains, California Science of the Total Environment, The. 112: 233-250. PMID 1566045 DOI: 10.1016/0048-9697(92)90190-4  0.76
1992 Arey J, Harger WP, Helmig D, Atkinson R. Bioassay-directed fractionation of mutagenic PAH atmospheric photooxidation products and ambient particulate extracts Mutation Research Letters. 281: 67-76. PMID 1371594 DOI: 10.1016/0165-7992(92)90038-J  0.76
1992 Helmig D, Bauer A, Müller J, Klein W. Authors' reply Atmospheric Environment Part a, General Topics. 26: 518-519. DOI: 10.1016/0960-1686(92)90336-J  0.76
1992 Helmig D, Arey J, Atkinson R, Harger WP, McElroy PA. Products of the OH radical-initiated gas-phase reaction of fluorene in the presence of NOx Atmospheric Environment Part a, General Topics. 26: 1735-1745. DOI: 10.1016/0960-1686(92)90071-R  0.76
1992 Helmig D, Arey J, Harger WP, Atkinson R, López-Cancio J. Formation of mutagenic nitrodibenzopyranones and their occurrence in ambient air Environmental Science and Technology. 26: 622-624.  0.76
1991 Helmig D, Arey J. Analytical chemistry of airborne nitrofluorenes International Journal of Environmental Analytical Chemistry. 43: 219-233. DOI: 10.1080/03067319108027526  0.76
1990 Helmig D, Bauer A, Müller J, Klein W. Analysis of particulate organics in a forest atmosphere by thermodesorption GC/MS Atmospheric Environment Part a, General Topics. 24: 179-184. DOI: 10.1016/0960-1686(90)90454-U  0.76
1990 Helmig D, Müller J, Klein W. Analysis of peroxyacetyl nitrate (PAN) in the vertical profile of a spruce stand Atmospheric Environment Part a, General Topics. 24: 2141-2152. DOI: 10.1016/0960-1686(90)90248-L  0.76
1989 Helmig D, Müller J, Klein W. Volatile organic substances in a forest atmosphere Chemosphere. 19: 1399-1412. DOI: 10.1016/0045-6535(89)90088-X  0.76
1989 Helmig D, Müller J, Klein W. Improvements in analysis of atmospheric peroxyacetyl nitrate (PAN) Atmospheric Environment (1967). 23: 2187-2192. DOI: 10.1016/0004-6981(89)90180-7  0.76
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