| Year |
Citation |
Score |
| 2023 |
Yue F, Angot H, Blomquist B, Schmale J, Hoppe CJM, Lei R, Shupe MD, Zhan L, Ren J, Liu H, Beck I, Howard D, Jokinen T, Laurila T, Quéléver L, ... ... Helmig D, et al. The Marginal Ice Zone as a dominant source region of atmospheric mercury during central Arctic summertime. Nature Communications. 14: 4887. PMID 37580358 DOI: 10.1038/s41467-023-40660-9 |
0.335 |
|
| 2023 |
Tham YJ, Sarnela N, Iyer S, Li Q, Angot H, Quéléver LLJ, Beck I, Laurila T, Beck LJ, Boyer M, Carmona-García J, Borrego-Sánchez A, Roca-Sanjuán D, Peräkylä O, Thakur RC, ... ... Helmig D, et al. Widespread detection of chlorine oxyacids in the Arctic atmosphere. Nature Communications. 14: 1769. PMID 36997509 DOI: 10.1038/s41467-023-37387-y |
0.325 |
|
| 2022 |
Selimovic V, Ketcherside D, Chaliyakunnel S, Wielgasz C, Permar W, Angot H, Millet DB, Fried A, Helmig D, Hu L. Atmospheric biogenic volatile organic compounds in the Alaskan Arctic tundra: constraints from measurements at Toolik Field Station. Atmospheric Chemistry and Physics. 22: 14037-14058. PMID 37476609 DOI: 10.5194/acp-22-14037-2022 |
0.396 |
|
| 2022 |
Angot H, Blomquist B, Howard D, Archer S, Bariteau L, Beck I, Boyer M, Crotwell M, Helmig D, Hueber J, Jacobi HW, Jokinen T, Kulmala M, Lan X, Laurila T, et al. Year-round trace gas measurements in the central Arctic during the MOSAiC expedition. Scientific Data. 9: 723. PMID 36434022 DOI: 10.1038/s41597-022-01769-6 |
0.331 |
|
| 2021 |
Asher E, Hills AJ, Hornbrook RS, Shertz S, Gabbard S, Stephens BB, Helmig D, Apel EC. Unpiloted Aircraft System Instrument for the Rapid Collection of Whole Air Samples and Measurements for Environmental Monitoring and Air Quality Studies. Environmental Science & Technology. 55: 5657-5667. PMID 33881834 DOI: 10.1021/acs.est.0c07213 |
0.356 |
|
| 2020 |
Angot H, McErlean K, Hu L, Millet DB, Hueber J, Cui K, Moss J, Wielgasz C, Milligan T, Ketcherside D, Bret-Harte MS, Helmig D. Biogenic volatile organic compound ambient mixing ratios and emission rates in the Alaskan Arctic tundra. Biogeosciences (Online). 17: 6219-6236. PMID 35222652 DOI: 10.5194/bg-17-6219-2020 |
0.36 |
|
| 2020 |
Clifton OE, Fiore AM, Massman WJ, Baublitz CB, Coyle M, Emberson L, Fares S, Farmer DK, Gentine P, Gerosa G, Guenther AB, Helmig D, Lombardozzi DL, Munger JW, Patton EG, et al. Dry Deposition of Ozone over Land: Processes, Measurement, and Modeling. Reviews of Geophysics (Washington, D.C. : 1985). 58. PMID 33748825 DOI: 10.1029/2019RG000670 |
0.328 |
|
| 2020 |
Pozzer A, Schultz MG, Helmig D. Impact of U.S. Oil and Natural Gas Emission Increases on Surface Ozone Is Most Pronounced in the Central United States. Environmental Science & Technology. PMID 32902267 DOI: 10.1021/Acs.Est.9B06983 |
0.459 |
|
| 2020 |
Helmig D, Liptzin D, Hueber J, Savarino J. Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica The Cryosphere. 14: 199-209. DOI: 10.5194/Tc-14-199-2020 |
0.528 |
|
| 2020 |
Angot H, McErlean K, Hu L, Millet DB, Hueber J, Cui K, Moss J, Wielgasz C, Milligan T, Ketcherside D, Bret-Harte MS, Helmig D. Biogenic volatile organic compound ambient mixing ratios and emission rates in the Alaskan Arctic tundra Biogeosciences Discussions. 1-39. DOI: 10.5194/Bg-2020-235 |
0.466 |
|
| 2020 |
Howard D, Agnan Y, Helmig D, Yang Y, Obrist D. Environmental controls on ecosystem-scale cold-season methane and carbon dioxide fluxes in an Arctic tundra ecosystem Biogeosciences. 17: 4025-4042. DOI: 10.5194/Bg-17-4025-2020 |
0.408 |
|
| 2020 |
Wang W, Ganzeveld L, Rossabi S, Hueber J, Helmig D. Measurement report: Leaf-scale gas exchange of atmospheric reactivetrace species (NO 2 , NO, O 3 ) at a northern hardwood forest inMichigan Atmospheric Chemistry and Physics. 1-28. DOI: 10.5194/Acp-2020-149 |
0.438 |
|
| 2020 |
Pound RJ, Sherwen T, Helmig D, Carpenter LJ, Evans MJ. Influences of oceanic ozone deposition on tropospheric photochemistry Atmospheric Chemistry and Physics. 20: 4227-4239. DOI: 10.5194/Acp-20-4227-2020 |
0.421 |
|
| 2020 |
Clifton OE, Fiore AM, Massman WJ, Baublitz CB, Coyle M, Emberson L, Fares S, Farmer DK, Gentine P, Gerosa G, Guenther AB, Helmig D, Lombardozzi DL, Munger JW, Patton EG, et al. Dry Deposition of Ozone Over Land: Processes, Measurement, and Modeling Reviews of Geophysics. 58. DOI: 10.1029/2019Rg000670 |
0.334 |
|
| 2019 |
Tzompa-Sosa ZA, Henderson BH, Keller CA, Travis K, Mahieu E, Franco B, Estes M, Helmig D, Fried A, Richter D, Weibring P, Walega J, Blake DR, Hannigan JW, Ortega I, et al. Atmospheric implications of large C-C alkane emissions from the U.S. oil and gas industry. Journal of Geophysical Research. Atmospheres : Jgr. 124: 1148-1169. PMID 32832312 DOI: 10.1029/2018Jd028955 |
0.395 |
|
| 2019 |
Jiskra M, Sonke JE, Agnan Y, Helmig D, Obrist D. Insights from mercury stable isotopes on terrestrial–atmosphere exchange of Hg(0) in the Arctic tundra Biogeosciences. 16: 4051-4064. DOI: 10.5194/Bg-16-4051-2019 |
0.441 |
|
| 2019 |
Trowbridge AM, Stoy PC, Adams HD, Law DJ, Breshears DD, Helmig D, Monson RK. Drought supersedes warming in determining volatile and tissue defenses of piñon pine (
Pinus edulis
) Environmental Research Letters. 14: 065006. DOI: 10.1088/1748-9326/Ab1493 |
0.398 |
|
| 2018 |
Helmig D, Liptzin D, Hueber J, Savarino J. Intrusion, retention, and snowpack chemical effects from exhaust emissions atConcordia Station, Antarctica The Cryosphere Discussions. 1-15. DOI: 10.5194/Tc-2018-182 |
0.503 |
|
| 2018 |
Agnan Y, Douglas TA, Helmig D, Hueber J, Obrist D. Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges The Cryosphere. 12: 1939-1956. DOI: 10.5194/Tc-12-1939-2018 |
0.465 |
|
| 2018 |
Song S, Angot H, Selin NE, Gallée H, Sprovieri F, Pirrone N, Helmig D, Savarino J, Magand O, Dommergue A. Understanding mercury oxidation and air–snow exchange on the East Antarctic Plateau: a modeling study Atmospheric Chemistry and Physics. 18: 15825-15840. DOI: 10.5194/Acp-18-15825-2018 |
0.448 |
|
| 2018 |
Helmig D, Blanchard B, Hueber J. Contrasting behavior of slow and fast photoreactive gases during the
August 21, 2017, solar eclipse Elem Sci Anth. 6: 72. DOI: 10.1525/elementa.322 |
0.339 |
|
| 2018 |
Feldman DR, Collins WD, Biraud SC, Risser MD, Turner DD, Gero PJ, Tadić J, Helmig D, Xie S, Mlawer EJ, Shippert TR, Torn MS. Observationally derived rise in methane surface forcing mediated by water vapour trends Nature Geoscience. 11: 238-243. DOI: 10.1038/S41561-018-0085-9 |
0.344 |
|
| 2018 |
Dalsøren SB, Myhre G, Hodnebrog Ø, Myhre CL, Stohl A, Pisso I, Schwietzke S, Höglund-Isaksson L, Helmig D, Reimann S, Sauvage S, Schmidbauer N, Read KA, Carpenter LJ, Lewis AC, et al. Discrepancy between simulated and observed ethane and propane levels explained by underestimated fossil emissions Nature Geoscience. 11: 178-184. DOI: 10.1038/S41561-018-0073-0 |
0.432 |
|
| 2018 |
Rossabi S, Choudoir M, Helmig D, Hueber J, Fierer N. Volatile Organic Compound Emissions From Soil Following Wetting Events Journal of Geophysical Research: Biogeosciences. 123: 1988-2001. DOI: 10.1029/2018Jg004514 |
0.324 |
|
| 2018 |
Thompson RL, Nisbet EG, Pisso I, Stohl A, Blake D, Dlugokencky EJ, Helmig D, White JWC. Variability in Atmospheric Methane From Fossil Fuel and Microbial Sources Over the Last Three Decades Geophysical Research Letters. 45. DOI: 10.1029/2018Gl078127 |
0.362 |
|
| 2018 |
Monks SA, Wilson C, Emmons LK, Hannigan JW, Helmig D, Blake NJ, Blake DR. Using an Inverse Model to Reconcile Differences in Simulated and Observed Global Ethane Concentrations and Trends Between 2008 and 2014 Journal of Geophysical Research: Atmospheres. 123: 11,262-11,282. DOI: 10.1029/2017Jd028112 |
0.309 |
|
| 2017 |
Matichuk R, Tonnesen G, Luecken D, Gilliam R, Napelenok SL, Baker KR, Schwede D, Murphy B, Helmig D, Lyman SN, Roselle S. Evaluation of the Community Multiscale Air Quality Model for Simulating Winter Ozone Formation in the Uinta Basin. Journal of Geophysical Research. Atmospheres : Jgr. 122: 13545-13572. PMID 30245953 DOI: 10.1002/2017Jd027057 |
0.464 |
|
| 2017 |
Obrist D, Agnan Y, Jiskra M, Olson CL, Colegrove DP, Hueber J, Moore CW, Sonke JE, Helmig D. Tundra uptake of atmospheric elemental mercury drives Arctic mercury pollution. Nature. 547: 201-204. PMID 28703199 DOI: 10.1038/Nature22997 |
0.375 |
|
| 2017 |
Newland MJ, Martinerie P, Witrant E, Helmig D, Worton DR, Hogan C, Sturges WT, Reeves CE. Changes to the chemical state of the Northern Hemisphere atmosphere during the second half of the twentieth century Atmospheric Chemistry and Physics. 17: 8269-8283. DOI: 10.5194/Acp-17-8269-2017 |
0.45 |
|
| 2017 |
Huang Y, Wu S, Kramer LJ, Helmig D, Honrath RE. Surface ozone and its precursors at Summit, Greenland: comparison between observations and model simulations Atmospheric Chemistry and Physics. 17: 14661-14674. DOI: 10.5194/Acp-17-14661-2017 |
0.424 |
|
| 2017 |
Tzompa‐Sosa ZA, Mahieu E, Franco B, Keller CA, Turner AJ, Helmig D, Fried A, Richter D, Weibring P, Walega J, Yacovitch TI, Herndon SC, Blake DR, Hase F, Hannigan JW, et al. Revisiting global fossil fuel and biofuel emissions of ethane Journal of Geophysical Research: Atmospheres. 122: 2493-2512. DOI: 10.1002/2016Jd025767 |
0.378 |
|
| 2016 |
Evans JM, Helmig D. Investigation of the Influence of Transport from Oil and Natural Gas Regions on Elevated Ozone Levels in the Northern Colorado Front Range. Journal of the Air & Waste Management Association (1995). PMID 27629587 DOI: 10.1080/10962247.2016.1226989 |
0.468 |
|
| 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 |
0.51 |
|
| 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 |
0.475 |
|
| 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 |
0.422 |
|
| 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 |
0.77 |
|
| 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 |
0.388 |
|
| 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 |
0.51 |
|
| 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 |
0.418 |
|
| 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 |
0.514 |
|
| 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 |
0.449 |
|
| 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 |
0.45 |
|
| 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 |
0.508 |
|
| 2015 |
Helmig D, Muñoz M, Hueber J, Mazzoleni C, Mazzoleni L, Owen RC, Val-Martin M, Fialho P, Plass-Duelmer C, Palmer PI, Lewis AC, Pfister G. Climatology and atmospheric chemistry of the non-methane hydrocarbons ethane and propane over the North Atlantic Elementa: Science of the Anthropocene. 3: 000054. DOI: 10.12952/JOURNAL.ELEMENTA.000054 |
0.329 |
|
| 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 |
0.433 |
|
| 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 |
0.451 |
|
| 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 |
0.48 |
|
| 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 |
0.47 |
|
| 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 |
0.314 |
|
| 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 |
0.433 |
|
| 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 |
0.401 |
|
| 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 |
0.774 |
|
| 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 |
0.385 |
|
| 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 |
0.717 |
|
| 2014 |
Oltmans SJ, Karion A, Schnell RC, Pétron G, Sweeney C, Wolter S, Neff D, Montzka SA, Miller BR, Helmig D, Johnson BJ, Hueber J. A high ozone episode in winter 2013 in the Uinta Basin oil and gas region characterized by aircraft measurements Atmospheric Chemistry and Physics Discussions. 14: 20117-20157. DOI: 10.5194/Acpd-14-20117-2014 |
0.482 |
|
| 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 |
0.376 |
|
| 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 |
0.5 |
|
| 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 |
0.304 |
|
| 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 |
0.448 |
|
| 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 |
0.396 |
|
| 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 |
0.757 |
|
| 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 |
0.409 |
|
| 2013 |
Faïn X, Helmig D, Hueber J, Obrist D, Williams MW. Mercury dynamics in the Rocky Mountain, Colorado, snowpack Biogeosciences. 10: 3793-3807. DOI: 10.5194/Bg-10-3793-2013 |
0.494 |
|
| 2013 |
Zhang B, Owen RC, Perlinger JA, Kumar A, Wu S, Val Martin M, Kramer L, Helmig D, Honrath RE. A Lagrangian view of ozone production tendency in North American outflow in summers 2009 and 2010 Atmospheric Chemistry and Physics Discussions. 13: 15141-15190. DOI: 10.5194/Acpd-13-15141-2013 |
0.373 |
|
| 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 |
0.374 |
|
| 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 |
0.487 |
|
| 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 |
0.48 |
|
| 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 |
0.452 |
|
| 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 |
0.421 |
|
| 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 |
0.41 |
|
| 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 |
0.443 |
|
| 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 |
0.447 |
|
| 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 |
0.412 |
|
| 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 |
0.414 |
|
| 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 |
0.446 |
|
| 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 |
0.388 |
|
| 2012 |
Van Dam B, Helmig D. Comments on 'Possible contribution of triboelectricity to snowair interactions' Environmental Chemistry. 9: 116-118. DOI: 10.1071/En11151 |
0.426 |
|
| 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 |
0.791 |
|
| 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 |
0.762 |
|
| 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. |
0.349 |
|
| 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 |
0.783 |
|
| 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 |
0.478 |
|
| 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 |
0.412 |
|
| 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 |
0.47 |
|
| 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 |
0.374 |
|
| 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 |
0.448 |
|
| 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. |
0.769 |
|
| 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 |
0.458 |
|
| 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 |
0.397 |
|
| 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 |
0.453 |
|
| 2009 |
Pozzer A, Pollmann J, Taraborrelli D, Jöckel P, Helmig D, Tans P, Hueber J, Lelieveld J. C<sub>3</sub>-C<sub>5</sub> alkanes in the atmosphere: concentration, seasonal cycle and contribution to the atmospheric budgets of acetone and acetaldehyde Atmospheric Chemistry and Physics Discussions. 9: 1939-1976. DOI: 10.5194/Acpd-9-1939-2009 |
0.397 |
|
| 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 |
0.463 |
|
| 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 |
0.704 |
|
| 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 |
0.502 |
|
| 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 |
0.417 |
|
| 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 |
0.447 |
|
| 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 |
0.501 |
|
| 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 |
0.437 |
|
| 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 |
0.366 |
|
| 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 |
0.441 |
|
| 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 |
0.446 |
|
| 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 |
0.4 |
|
| 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 |
0.376 |
|
| 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 |
0.422 |
|
| 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 |
0.311 |
|
| 2008 |
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. DOI: 10.5194/Amt-2-99-2009 |
0.324 |
|
| 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 |
0.45 |
|
| 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 |
0.42 |
|
| 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 |
0.51 |
|
| 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 |
0.437 |
|
| 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 |
0.404 |
|
| 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 |
0.46 |
|
| 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 |
0.445 |
|
| 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 |
0.302 |
|
| 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 |
0.422 |
|
| 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 |
0.445 |
|
| 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 |
0.375 |
|
| 2007 |
Duhl TR, Helmig D, Guenther A. Sesquiterpene emissions from vegetation: A review Biogeosciences. 5: 761-777. DOI: 10.5194/Bg-5-761-2008 |
0.392 |
|
| 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 |
0.431 |
|
| 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 |
0.455 |
|
| 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 |
0.51 |
|
| 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 |
0.724 |
|
| 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 |
0.453 |
|
| 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 |
0.434 |
|
| 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 |
0.602 |
|
| 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 |
0.514 |
|
| 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 |
0.395 |
|
| 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 |
0.707 |
|
| 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 |
0.533 |
|
| 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 |
0.37 |
|
| 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 |
0.356 |
|
| 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 |
0.358 |
|
| 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 |
0.388 |
|
| 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 |
0.304 |
|
| 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 |
0.679 |
|
| 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 |
0.655 |
|
| 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 |
0.388 |
|
| 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 |
0.36 |
|
| 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 |
0.467 |
|
| 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 |
0.363 |
|
| 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 |
0.423 |
|
| 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 |
0.386 |
|
| 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 |
0.413 |
|
| 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 |
0.467 |
|
| 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 |
0.466 |
|
| 1999 |
Helmig D. Air analysis by gas chromatography Journal of Chromatography A. 843: 129-146. DOI: 10.1016/S0021-9673(99)00173-9 |
0.311 |
|
| 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 |
0.449 |
|
| 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. 103: 22397-22414. DOI: 10.1029/98Jd00969 |
0.417 |
|
| 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. |
0.309 |
|
| 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 |
0.387 |
|
| 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. PMID 14871743 DOI: 10.1093/Treephys/16.1-2.17 |
0.434 |
|
| 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 |
0.395 |
|
| 1996 |
Greenberg JP, Helmig D, Zimmerman PR. Seasonal measurements of nonmethane hydrocarbons and carbon monoxide at the Mauna Loa Observatory during the Mauna Loa Observatory Photochemistry Experiment 2 Journal of Geophysical Research: Atmospheres. 101: 14581-14598. DOI: 10.1029/95Jd01543 |
0.485 |
|
| 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 |
0.319 |
|
| 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. |
0.325 |
|
| 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 |
0.31 |
|
| 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 |
0.399 |
|
| 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 |
0.324 |
|
| 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 |
0.303 |
|
| 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 |
0.414 |
|
| 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 |
0.389 |
|
| 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 |
0.426 |
|
| 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 |
0.349 |
|
| 1992 |
Helmig D, Arey J. Analytical chemistry of four nitrodibenzopyranone isomers for ambient air analysis International Journal of Environmental Analytical Chemistry. 49: 207-219. DOI: 10.1080/03067319208027572 |
0.386 |
|
| 1992 |
Helmig D, Lopez-Canclo J, Arey J, Harger WP, Atkinson R. Quantification of ambient nitrodibenzopyranones: Further evidence for atmospheric mutagen formation Environmental Science and Technology. 26: 2207-2213. DOI: 10.1021/Es00035A020 |
0.42 |
|
| 1992 |
Helmig D, Arey J, Harger WP, Atkinson R, Lopez-Cancio J. Formation of mutagenic nitrodibenzopyranones and their occurrence in ambient air Environmental Science & Technology. 26: 622-624. DOI: 10.1021/Es00027A028 |
0.351 |
|
| 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 |
0.324 |
|
| 1991 |
Helmig D, Arey J. Analytical chemistry of airborne nitrofluorenes International Journal of Environmental Analytical Chemistry. 43: 219-233. DOI: 10.1080/03067319108027526 |
0.303 |
|
| 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 |
0.383 |
|
| 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 |
0.32 |
|
| 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 |
0.307 |
|
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