D. Helmig

发表

Measurements of landscape-scale fluxes of carbon dioxide in the Peruvian Amazon by vertical profiling through the atmospheric boundary layer

Pieter P. Tans, Thomas J. Conway, John W. Birks, 2000 .

Ozone photochemistry in an oil and natural gas extraction region during winter: simulations of a snow-free season in the Uintah Basin, Utah

Randal S. Martin, J. Peischl, J. Thornton, 2013 .

Net ecosystem fluxes of isoprene over tropical South America inferred from Global Ozone Monitoring Experiment (GOME) observations of HCHO columns

R. Martin, K. Chance, P. Palmer, 2008 .

Process-level controls on CO2 fluxes from a seasonally snow-covered subalpine meadow soil, Niwot Ridge, Colorado

G. Filippa, M. Williams, D. Helmig, 2009 .

Tropospheric Ozone Assessment Report: Database and Metrics Data of Global Surface Ozone Observations

Nick Reid, Sabine Schröder, Olga Lyapina, 2017 .

A new look at methane and nonmethane hydrocarbon emissions from oil and natural gas operations in the Colorado Denver‐Julesburg Basin

Gabrielle Pétron, Colm Sweeney, Allen B. White, 2014 .

International comparison of a hydrocarbon gas standard at the picomol per mol level.

S. Montzka, B. Hall, B. Miller, 2014, Analytical chemistry.

Isoprene emissions and impacts over an ecological transition region in the U.S. Upper Midwest inferred from tall tower measurements

Lu Hu, T. Griffis, D. Millet, 2015 .

A semi-Lagrangian view of ozone production tendency in North American outflow in the summers of 2009 and 2010

L. Kramer, Shiliang Wu, D. Helmig, 2014 .

Free-troposphere ozone and carbon monoxide over the North Atlantic for 2001–2011

L. Kramer, Qinbin Li, Shiliang Wu, 2013 .

Impact of U.S. Oil and Natural Gas Emission Increases on Surface Ozone Is Most Pronounced in the Central United States

A. Pozzer, M. Schultz, D. Helmig, 2020, Environmental science & technology.

Volatile organic substances in a forest atmosphere

W. Klein, D. Helmig, Josef Müller, 1989 .

Ozone Reactivity Measurement of Biogenic Volatile Organic Compound Emissions

A. Guenther, D. Helmig, J. Hueber, 2021, Atmospheric Measurement Techniques.

Approaches for quantifying reactive and low-volatility biogenic organic compound emissions by vegetation enclosure techniques - part A.

J. Ortega, D. Helmig, 2008, Chemosphere.

The influence of boreal biomass burning emissions on the distribution of tropospheric ozone over North America and the North Atlantic during 2010

K. Bowman, J. Worden, M. Deeter, 2011 .

The POLARCAT Model Intercomparison Project (POLMIP): Overview and Evaluation with Observations

J. Peischl, S. Tilmes, D. Blake, 2014 .

Changes in summertime ozone in Colorado during 2000–2015

D. Helmig, Tanja Bien, 2018 .

The Role of Snow in Controlling Halogen Chemistry and Boundary Layer Oxidation During Arctic Spring: A 1D Modeling Case Study

K. Tuite, L. Emmons, J. Orlando, 2022, Journal of Geophysical Research: Atmospheres.

Isoprene biosynthesis in Bacillus subtilis via the methylerythritol phosphate pathway.

R. Fall, D. Helmig, W. P. Wagner, 2000, Journal of natural products.

Please refer to the corresponding final paper in ACP if available . C 3C 5 alkanes in the atmosphere : concentration , seasonal cycle and contribution to the atmospheric budgets of acetone and acetaldehyde

J. Lelieveld, A. Pozzer, P. Tans, 2009 .

Evaluation of ozone measurements from a tethered balloon-sampling platform at South Pole Station in December 2003

S. Oltmans, B. Johnson, D. Helmig, 2008 .

Mercury dynamics in the Rocky Mountain, Colorado, snowpack

X. Faïn, M. Williams, D. Helmig, 2012 .

Quantifying the impact of BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites (BORTAS) experiment: design, execution and science overview

P. Bernath, K. Walker, K. Strawbridge, 2013 .

Ozone uptake to the polar snowpack at Summit, Greenland

S. Oltmans, D. Helmig, L. Cohen, 2007 .

Formation of mutagenic nitrodibenzopyranones and their occurrence in ambient air

D. Helmig, J. Arey, R. Atkinson, 1992 .

Analysis of atmospheric sesquiterpenes: sampling losses and mitigation of ozone interferences.

J. Ortega, D. Helmig, J. Pollmann, 2005, Environmental science & technology.

New insights into the atmospheric mercury cycling in 1 Central Antarctica and implications at a continental scale 2 3

O. Magand, H. Gallée, P. Ricaud, 2016 .

Impact of exhaust emissions on chemical snowpack composition at Concordia Station, Antarctica

D. Helmig, D. Liptzin, J. Hueber, 2020 .

Contrasting behavior of slow and fast photoreactive gases during the August 21, 2017, solar eclipse

D. Helmig, J. Hueber, B. Blanchard, 2018 .

Intrusion, retention, and snowpack chemical effects from exhaust emissions at Concordia Station, Antarctica

D. Helmig, D. Liptzin, J. Hueber, 2018 .

Evaluation of the Community Multiscale Air Quality Model for Simulating Winter Ozone Formation in the Uinta Basin

D. Luecken, R. Gilliam, K. Baker, 2017, Journal of geophysical research. Atmospheres : JGR.

Fluxes and chemistry of nitrogen oxides in the Niwot Ridge, Colorado, snowpack

M. Williams, R. Sanford, D. Helmig, 2009 .

Reversal of Long-Term Trends in Ethane Identified from the Global Atmosphere Watch Reactive Gases Measurement Network

Stefan Reimann, Oksana A. Tarasova, Rainer Steinbrecher, 2015 .

Variability analyses, site characterization, and regional [OH] estimates using trace gas measurements from the NOAA Global Greenhouse Gas Reference Network

J. Lelieveld, P. Tans, D. Helmig, 2016 .

Sampling, storage, and analysis of C2-C7 non-methane hydrocarbons from the US National Oceanic and Atmospheric Administration Cooperative Air Sampling Network glass flasks.

P. Tans, D. Helmig, C. Plass-Dülmer, 2008, Journal of chromatography. A.

Nonmethane hydrocarbons at Pico Mountain, Azores: 1. Oxidation chemistry in the North Atlantic region

R. C. Owen, D. Parrish, D. Helmig, 2008 .

Seasonal in situ observations of glyoxal and methylglyoxal over the temperate oceans of the Southern Hemisphere

Z. Ristovski, M. Keywood, I. Galbally, 2014 .

A Lagrangian view of ozone production tendency in North American outflow in summers 2009 and 2010

L. Kramer, D. Helmig, R. Honrath, 2013 .

Changes in Atmospheric Butanes and Pentanes and Their Isomeric Ratios in the Continental United States

D. Helmig, S. Rossabi, 2018 .

Use of chloroflurocarbons as internal standards for the measurement of atmospheric non-methane volatile organic compounds sampled onto solid adsorbent cartridges.

D. Helmig, J. Birks, C. M. Karbiwnyk, 2003, Environmental science & technology.

Analytical Chemistry of Four Nitrodibenzopyranone Isomers for Ambient Air Analysis

D. Helmig, J. Arey, 1992 .

Ten-year chemical signatures associated with long-range transport observed in the free troposphere over the central North Atlantic

Bo Zhang, L. Kramer, Bo Zhang, 2017 .

Weekend‐Weekday Implications and the Impact of Wildfire Smoke on Ozone and Its Precursors at Boulder Reservoir, Colorado Between 2017 and 2019

E. Fischer, D. Helmig, Ilana B. Pollack, 2021, Journal of Geophysical Research: Atmospheres.

Comparison of ozone concentrations on a surface elevation gradient with balloon-borne ozonesonde measurements

S. Oltmans, B. Johnson, D. Helmig, 2011 .

Ozone dynamics and snow-atmosphere exchanges during ozone depletion events at Barrow, Alaska

P. Shepson, A. Weinheimer, D. Knapp, 2012 .

Secondary organic aerosol from sesquiterpene and monoterpene emissions in the United States.

J. Milford, C. Wiedinmyer, A. Guenther, 2008, Environmental science & technology.

Evaluation of the flux gradient technique for measurement of ozone surface fluxes over snowpack at Summit, Greenland

C. Fairall, B. Dam, D. Helmig, 2011 .

Sesquiterpene emissions from loblolly pine and their potential contribution to biogenic aerosol formation in the Southeastern US

J. Ortega, C. Geron, A. Guenther, 2006 .

Analytical techniques for sesquiterpene emission rate studies in vegetation enclosure experiments

D. Helmig, T. Revermann, J. Pollmann, 2004 .

Characterization of a pressurized C5-C16 hydrocarbon gas calibration standard for air analysis.

B. Hall, D. Helmig, T. Revermann, 2004, Analytical chemistry.

Sesquiterpene analytical characteristics by PTR-MS

A. Guenther, T. Karl, D. Helmig, 2008 .

Large-scale impacts of anthropogenic and boreal fire emissions apparent in multi-year free tropospheric observations in the Azores.

R. C. Owen, J. Kleissl, Maria Val Martin, 2005 .

Impacts of anthropogenic and boreal fire emissions in the central North Atlantic lower free troposphere: summertime observations at the PICO-NARE observatory.

R. C. Owen, J. Kleissl, Maria Val Martin, 2005 .

Summer variability of the atmospheric NO2:NO ratio at Dome C, on the East Antarctic Plateau

M. Frey, D. Helmig, N. Caillon, 2021, Atmospheric Chemistry and Physics.

Occurrence of upslope flows at the Pico mountaintop observatory: A case study of orographic flows on a small, volcanic island

R. C. Owen, J. Kleissl, D. Helmig, 2007 .

A study of boundary layer behavior associated with high NO concentrations at the South Pole using a minisodar, tethered balloon, and sonic anemometer

W. Neff, D. Helmig, A. Grachev, 2008 .

Measurement report: Leaf-scale gas exchange of atmospheric reactive trace species (NO2, NO, O3) at a northern hardwood forest in Michigan

D. Helmig, S. Rossabi, L. Ganzeveld, 2020 .

Measurement report: Leaf-scale gas exchange of atmospheric reactive trace species (NO2, NO, O3) at a northern hardwood forest in Michigan

D. Helmig, S. Rossabi, L. Ganzeveld, 2020 .

Artifact formation from the use of potassium‐iodide‐based ozone traps during atmospheric sampling of trace organic gases

J. Greenberg, D. Helmig, 1995 .

A reassessment of Antarctic plateau reactive nitrogen based on ANTCI 2003 airborne and ground based measurements

D. Blake, Yuhang Wang, G. Huey, 2008 .

Volatile organic compounds and isoprene oxidation products at a temperate deciduous forest site

C. Geron, A. Guenther, P. Zimmerman, 1998 .

Ozone in Interstitial Air of the Mid-Latitude, Seasonal Snowpack at Niwot Ridge, Colorado

S. Oltmans, D. Helmig, F. Bocquet, 2007 .

Long-term decline of global atmospheric ethane concentrations and implications for methane

Nicola J. Blake, Isobel J. Simpson, Simone Meinardi, 2012, Nature.

Release and uptake of volatile inorganic and organic gases through the snowpack at Niwot Ridge, Colorado

D. Blake, D. Helmig, E. Apel, 2009 .

Gas chromatography system for the automated, unattended, and cryogen-free monitoring of C2 to C6 non-methane hydrocarbons in the remote troposphere.

P. Goldan, D. Helmig, J. Hueber, 2006, Journal of chromatography. A.

Photochemical evolution of continental outflow to Pico Mountain (Azores): Integrating observations with CTM simulations in lowerFT outflow.

R. C. Owen, Q. B. Li, D. Helmig, 2007 .

Approaches for quantifying reactive and low-volatility biogenic organic compound emissions by vegetation enclosure techniques - part B: applications.

J. Ortega, A. Guenther, D. Helmig, 2008, Chemosphere.

Flame control accessory for GC-FID operation with autosampler injection

D. Helmig, N. Schwarzer, J. Steinhanses, 1990 .

Flux estimates and OH reaction potential of reactive biogenic volatile organic compounds (BVOCs) from a mixed northern hardwood forest

J. Ortega, P. Harley, A. Guenther, 2007 .

Analytical Chemistry of Airborne Nitrofluorenes

D. Helmig, J. Arey, 1991 .

Boundary-layer dynamics and its influence on atmospheric chemistry at Summit, Greenland

Christopher W. Fairall, Andrey A. Grachev, Detlev Helmig, 2007 .

Evaluation of Boundary Layer Depth Estimates at Summit Station, Greenland

L. Kramer, W. Neff, B. Dam, 2013 .

Spring and summertime diurnal surface ozone fluxes over the polar snow at Summit, Greenland

S. Oltmans, W. Neff, D. Helmig, 2009 .

An overview of air-snow exchange at Summit, Greenland : Recent experiments and findings

D. Blake, E. Atlas, M. Frey, 2007 .

Episodes of high surface-ozone amounts at South Pole during summer and their impact on the long-term surface-ozone variation

S. Oltmans, B. Johnson, D. Helmig, 2008 .

Ozone and meteorological boundary-layer conditions at Summit, Greenland, during 3–21 June 2000

K. Steffen, S. Oltmans, B. Johnson, 2002 .

Direct covariance measurement of CO2 gas transfer velocity during the 2008 Southern Ocean Gas Exchange Experiment: Wind speed dependency

W. McGillis, C. Fairall, D. Helmig, 2011 .

Comparison of computed and measured photooxidant concentrations at a forest site

D. Helmig, E. Renner, W. Rolle†, 1993 .

Insights from mercury stable isotopes on terrestrial–atmosphere exchange of Hg(0) in the Arctic tundra

D. Helmig, J. Sonke, D. Obrist, 2019, Biogeosciences.

Analysis of peroxyacetyl nitrate (PAN) in the vertical profile of a spruce stand

W. Klein, D. Helmig, Josef Müller, 1990 .

Fully automated gas chromatograph-flame ionization detector system for the in situ determination of atmospheric nonmethane hydrocarbons at low parts per trillion concentration

P. Zimmerman, J. Greenberg, D. Helmig, 1994 .

Winter and summer nitrous oxide and nitrogen oxides fluxes from a seasonally snow-covered subalpine meadow at Niwot Ridge, Colorado

B. Hall, M. Freppaz, G. Filippa, 2009 .

Antarctic Tropospheric Chemistry Investigation (ANTCI) 2003 overview

D. Blake, Yuhang Wang, G. Huey, 2008 .

Inter-annual variability of surface ozone at coastal (Dumont d'Urville,2004–2014) and inland (Concordia, 2007–2014) sites in East Antarctica

M. Frey, M. Legrand, A. Jones, 2016 .

Title Winter and summer nitrous oxide and nitrogen oxides fluxes from a seasonally snow-covered subalpine meadow at Niwot Ridge , Colorado Permalink

B. Hall, M. Freppaz, G. Filippa, 2009 .

Substantial contribution of iodine to Arctic ozone destruction

H. Skov, A. Stohl, Kevin M. Posman, 2022, Nature Geoscience.

Chemical equation set and complete gures set

A. Pozzer, D. Helmig, D. Taraborrelli, 2010 .

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

L. Kramer, B. Dam, D. Helmig, 2015 .

Ozone in the Interstitial Air of the Polar Snowpack at Summit , 1 Greenland 2 3 4

S. Oltmans, D. Helmig, L. Cohen, 2006 .

7.0 OZONE DEPOSITION VELOCITY DURING SNOW-COVERED AND NON-SNOW- COVERED PERIODS BY EDDY COVARIANCE

P. Boylan, D. Helmig, J. Hueber, 2014 .

Atmospheric biogenic volatile organic compounds in the Alaskan Arctic tundra: constraints from measurements at Toolik Field Station

Lu Hu, D. Millet, D. Helmig, 2022, Atmospheric chemistry and physics.

Tropospheric Ozone Assessment Report, links to Global surface ozone datasets

Nick Reid, Sabine Schröder, Olga Lyapina, 2017 .

High winter ozone pollution from carbonyl photolysis in an oil and gas basin

C. Sweeney, P. Edwards, Shao-Meng Li, 2014, Nature.

Investigation of the influence of transport from oil and natural gas regions on elevated ozone levels in the northern Colorado front range

D. Helmig, Jason Evans, 2017, Journal of the Air & Waste Management Association.

Quantifying wintertime boundary layer ozone production from frequent profile measurements in the Uinta Basin, UT, oil and gas region

G. Pétron, S. Oltmans, B. Johnson, 2016 .

Bioassay-directed fractionation of mutagenic PAH atmospheric photooxidation products and ambient particulate extracts.

D. Helmig, J. Arey, R. Atkinson, 1992, Mutation research.

Quantification of ambient nitrodibenzopyranones: further evidence for atmospheric mutagen formation

D. Helmig, J. Arey, R. Atkinson, 1992 .

Year-round trace gas measurements in the central Arctic during the MOSAiC expedition

I. Vimont, M. Shupe, T. Petäjä, 2022, Scientific Data.

White on green: under-snow microbial processes and trace gas fluxes through snow, Niwot Ridge, Colorado Front Range

P. Blanken, M. Williams, D. Helmig, 2009 .

Tundra uptake of atmospheric elemental mercury drives Arctic mercury pollution

Christopher W. Moore, Daniel Obrist, Christina L. Olson, 2017, Nature.

Products of the OH radical-initiated gas-phase reaction of fluorene in the presence of NOx

D. Helmig, J. Arey, R. Atkinson, 1992 .

Contribution of flowering trees to urban atmospheric biogenic volatile organic compound emissions

A. Guenther, D. Helmig, R. Daly, 2012 .

An overview of snow photochemistry: evidence, mechanisms and impacts

P. Shepson, M. Frey, M. Guzman, 2007 .

A Phylogenetic and Functional Perspective on Volatile Organic Compound Production by Actinobacteria

Matthew J. Gebert, N. Fierer, D. Helmig, 2019, mSystems.

ARCHAEOMETALLURGICAL FIELDWORK AND THE USE OF A PORTABLE X‐RAY SPECTROMETER

D. Helmig, A. Hauptmann, E. Jackwerth, 1989 .

Ozone in the Atlantic Ocean marine boundary layer

S. Oltmans, P. Boylan, D. Helmig, 2015 .

Atmosphere‐ocean ozone fluxes during the TexAQS 2006, STRATUS 2006, GOMECC 2007, GasEx 2008, and AMMA 2008 cruises

C. Fairall, P. Boylan, M. Pallandt, 2012 .

OH radical-initiated gas-phase reaction products of phenanthrene

D. Helmig, W. Harger, 1994 .

Herbivory and climate interact serially to control monoterpene emissions from pinyon pine forests.

R. Monson, A. Trowbridge, P. Stoy, 2014, Ecology.

Understanding high wintertime ozone pollution events in an oil- and natural gas-producing region of the western US

A. Karion, J. Peischl, C. Sweeney, 2014 .

Organic chemicals in the air at Whitaker's Forest/Sierra Nevada Mountains, California.

D. Helmig, J. Arey, 1992, The Science of the total environment.

Contributions of individual reactive biogenic volatile organic compounds to organic nitrates above a mixed forest

P. Shepson, J. Ortega, P. Stevens, 2012 .

Summertime surface O3 behavior and deposition to tundra in the Alaskan Arctic

S. Oltmans, D. Helmig, P. Doskey, 2016 .

Dynamics of nitrogen oxides and ozone above and within a mixed hardwood forest in Northern Michigan

C. Vogel, M. Williams, D. Helmig, 2012 .

Atmosphere‐ocean ozone exchange: A global modeling study of biogeochemical, atmospheric, and waterside turbulence dependencies

A. Pozzer, C. Fairall, D. Helmig, 2009 .

Determination of oceanic ozone deposition by ship-borne eddy covariance flux measurements

C. Fairall, D. Helmig, J. Hare, 2009 .

Water-side turbulence enhancement of ozone deposition to the ocean

C. Fairall, D. Helmig, L. Ganzeveld, 2006 .

The role of ozone atmosphere-snow gas exchange on polar, boundary-layer tropospheric ozone ? a review and sensitivity analysis

T. Butler, S. Oltmans, D. Helmig, 2006 .

A review of surface ozone in the polar regions

J. Lamarque, S. Oltmans, A. Jones, 2007 .

Elevated ozone in the boundary layer at South Pole

S. Oltmans, B. Johnson, W. Neff, 2008 .

Boundary layer dynamics during the Ocean‐Atmosphere‐Sea‐Ice‐Snow (OASIS) 2009 experiment at Barrow, AK

Christopher W. Fairall, Patrick Boylan, Ralf M. Staebler, 2014 .

Evaluation of selected solid adsorbents for passive sampling of atmospheric oil and natural gas non-methane hydrocarbons

D. Helmig, J. Hueber, Jens Fangmeyer, 2021, Journal of the Air & Waste Management Association.

Spatial distribution of atmospheric oil and natural gas volatile organic compounds in the Northern Colorado Front Range

D. Helmig, S. Rossabi, J. Hueber, 2021 .

O3, CH4, CO2, CO, NO2 and NMHC aircraft measurements in the Uinta Basin oil and gas region under low and high ozone conditions in winter 2012 and 2013

A. Karion, C. Sweeney, S. Montzka, 2016 .

Bacteria and fungi associated with isoprene consumption in soil

N. Fierer, D. Helmig, C. Gray, 2015 .

A high ozone episode in winter 2013 in the Uinta Basin oil and gas region characterized by aircraft measurements

A. Karion, C. Sweeney, S. Montzka, 2014 .

Highly elevated atmospheric levels of volatile organic compounds in the Uintah Basin, Utah.

P. Boylan, P. Boylan, D. Helmig, 2014, Environmental science & technology.

Biogenic volatile organic compound emissions (BVOCs). I. Identifications from three continental sites in the U.S.

L. Vierling, C. Geron, A. Guenther, 1999, Chemosphere.

Tethered balloon measurements of biogenic VOCs in the atmospheric boundary layer

Kenneth J. Davis, Patrick R. Zimmerman, Alex Guenther, 1999 .

Dry Deposition of Ozone Over Land: Processes, Measurement, and Modeling

Sam J. Silva, W. Massman, P. Gentine, 2020, Reviews of geophysics.

Implementation of the Coupled Ocean‐Atmosphere Response Experiment flux algorithm with CO2, dimethyl sulfide, and O3

W. McGillis, B. Huebert, C. Fairall, 2011 .

Influences of oceanic ozone deposition on tropospheric photochemistry

Ryan J. Pound, M. Evans, D. Helmig, 2019, Atmospheric Chemistry and Physics.

Widespread detection of chlorine oxyacids in the Arctic atmosphere

H. Skov, D. Roca‐Sanjuán, M. Kulmala, 2023, Nature Communications.

Seasonal variability of atmospheric nitrogen oxides and non-methane hydrocarbons at the GEOSummit station, Greenland

A. Stohl, L. Kramer, S. Oltmans, 2014 .

Seasonal behavior of non-methane hydrocarbons in the firn air at Summit, Greenland

D. Helmig, J. Hueber, C. Stephens, 2014 .

Observed and simulated global distribution and budget of atmospheric C 2 -C 5 alkanes

J. Lelieveld, A. Pozzer, P. Tans, 2010 .

C 3 -C 5 alkanes in the atmosphere: concentration, seasonal cycle and contribution to the atmospheric budgets of acetone and acetaldehyde

J. Lelieveld, A. Pozzer, P. Tans, 2009 .

Evaluation of solid adsorbent materials for cryogen-free trapping-gas chromatographic analysis of atmospheric C2-C6 non-methane hydrocarbons.

P. Tans, D. Helmig, J. Hueber, 2006, Journal of chromatography. A.

Using an Inverse Model to Reconcile Differences in Simulated and Observed Global Ethane Concentrations and Trends Between 2008 and 2014

D. Blake, L. Emmons, N. Blake, 2018, Journal of Geophysical Research: Atmospheres.

Overview of the MOSAiC expedition—Atmosphere

D. Lawrence, T. Krumpen, G. Heinemann, 2022, Elementa: Science of the Anthropocene.

Volatile Organic Compound Emissions From Soil Following Wetting Events

N. Fierer, D. Helmig, S. Rossabi, 2018, Journal of Geophysical Research: Biogeosciences.

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

Lee A. Vierling, Detlev Helmig, L. Vierling, 1995 .

Calibration system and analytical considerations for quantitative sesquiterpene measurements in air.

D. Helmig, T. Revermann, D. David, 2003, Journal of chromatography. A.

Ozone removal techniques in the sampling of atmospheric volatile organic trace gases

D. Helmig, 1997 .

Gas chromatography mass spectrometry analysis of volatile organic trace gases at Mauna Loa Observatory, Hawaii

W. Pollock, P. Zimmerman, J. Greenberg, 1996 .

Automated in situ gas chromatographic-mass spectrometric analysis of ppt level volatile organic trace gases using multistage solid-adsorbent trapping

J. Greenberg, D. Helmig, 1994 .

Short-Lived Trace Gases in the Surface Ocean and the Atmosphere

P. Liss, B. Quack, Claire Hughes, 2014 .

Observationally derived rise in methane surface forcing mediated by water vapour trends

P. J. Gero, W. Collins, E. Mlawer, 2018, Nature Geoscience.

Winter gas exchange between the atmosphere and snow-covered soils on Niwot Ridge, Colorado, USA

S. K. Schmidt, M. Williams, D. Helmig, 2015 .

Drought supersedes warming in determining volatile and tissue defenses of piñon pine (Pinus edulis)

R. Monson, D. Breshears, H. Adams, 2019, Environmental Research Letters.

Snowpack-atmosphere gas exchanges of carbon dioxide, ozone, and nitrogen oxides at a hardwood forest site in northern Michigan

C. Vogel, M. Williams, D. Helmig, 2015 .

Environmental controls on ecosystem-scale cold-season methane and carbon dioxide fluxes in an Arctic tundra ecosystem

D. Helmig, Yu Yang, D. Obrist, 2020 .

Environmental controls on ecosystem-scale cold season methane and carbon dioxide fluxes in an Arctic tundra ecosystem

D. Helmig, Yu Yang, D. Obrist, 2019 .

Reconstruction of Northern Hemisphere 1950–2010 atmospheric non-methane hydrocarbons

V. Petrenko, D. Etheridge, W. Sturges, 2013 .

Revisiting global fossil fuel and biofuel emissions of ethane

S. Herndon, A. Turner, D. Blake, 2017 .

Sesquiterpene emissions from vegetation: A review

A. Guenther, D. Helmig, T. Duhl, 2007 .

Characterization and mitigation of water vapor effects in the measurement of ozone by chemiluminescence with nitric oxide

P. Boylan, D. Helmig, J. Park, 2013 .

Ambient Nonmethane Hydrocarbon Levels Along Colorado's Northern Front Range: Acute and Chronic Health Risks.

Benjamin D. Blair, D. Blake, N. Blake, 2018, Environmental science & technology.

Air quality impacts from oil and natural gas development in Colorado

D. Helmig, 2020 .

Volatile Organic Compounds in the Global Atmosphere

Stefan Reimann, Pieter P. Tans, Martin J T Milton, 2009 .

Variability in Atmospheric Methane From Fossil Fuel and Microbial Sources Over the Last Three Decades

R. Thompson, E. Dlugokencky, I. Pisso, 2018, Geophysical Research Letters.

Discrepancy between simulated and observed ethane and propane levels explained by underestimated fossil emissions

S. Reimann, I. Pisso, A. Stohl, 2018, Nature Geoscience.

Reversal of global atmospheric ethane and propane trends largely due to US oil and natural gas production

A. Pozzer, S. Montzka, S. Reimann, 2016 .

Air analysis by gas chromatography

D. Helmig, 1999 .

Biogenic volatile organic compound emissions (BVOCs). II. Landscape flux potentials from three continental sites in the U.S.

L. Vierling, C. Geron, A. Guenther, 1999, Chemosphere.

Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer

M. Frey, M. Legrand, D. Helmig, 2015 .

Biogenic hydrocarbon emissions and landcover/climate change in a subtropical savanna

L. Vierling, P. Harley, A. Guenther, 1999 .

Measurement of atmospheric sesquiterpenes by proton transfer reaction-mass spectrometry (PTR-MS)

A. Guenther, T. Karl, D. Helmig, 2008 .

Modelling the coupled mercury-halogen-ozone cycle in the central Arctic during spring

J. Christensen, H. Skov, A. Richter, 2023, Elem Sci Anth.

In-canopy gas-phase chemistry during CABINEX 2009: Sensitivity of a 1-D canopy model to vertical mixing and isoprene chemistry

P. Shepson, F. Keutsch, B. Jobson, 2012 .

Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon

J. Bognar, B. Balsley, D. Helmig, 1998 .

Molecular characterization of free tropospheric aerosol collected at the Pico Mountain Observatory: a case study with a long-range transported biomass burning plume

R. C. Owen, D. Wuebbles, K. Džepina, 2014, Atmospheric Chemistry and Physics.

Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges

D. Helmig, T. Douglas, J. Hueber, 2017, The Cryosphere.

Changes to the chemical state of the Northern Hemisphere atmosphere during the second half of the twentieth century

W. Sturges, E. Witrant, D. Helmig, 2016 .

Temporary pause in the growth of atmospheric ethane and propane in 2015–2018

I. Vimont, S. Montzka, G. Pétron, 2021, Atmospheric Chemistry and Physics.

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

M. Williams, D. Helmig, D. Liptzin, 2009 .

Leaf, branch, stand and landscape scale measurements of volatile organic compound fluxes from U.S. woodlands.

A. Guenther, L. Vierling, C. Geron, 1996, Tree physiology.

Sesquiterpene emissions from pine trees--identifications, emission rates and flux estimates for the contiguous United States.

J. Milford, J. Ortega, C. Wiedinmyer, 2007, Environmental science & technology.

Artifact-free preparation, storage and analysis of solid adsorbent sampling cartridges used in the analysis of volatile organic compounds in air

D. Helmig, 1996 .

Turbulent fluxes and transfer of trace gases from ship‐based measurements during TexAQS 2006

C. Fairall, D. Helmig, J. Hare, 2011 .

Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties

R. C. Owen, K. Džepina, Bo Zhang, 2015 .

New insights into the atmospheric mercury cycling in central Antarctica and implications on a continental scale

O. Magand, P. Ricaud, D. Helmig, 2022 .

Estimating urban vegetation cover fraction using Google Earth® images

Alex Guenther, Detlev Helmig, A. Guenther, 2012 .

Measurement of light absorbing particles in the snow of the Huaytapallana glacier in the central Andes of Peru and their effect on albedo and radiative forcing

C. Schmitt, D. Helmig, R. Estevan, 2018, Óptica Pura y Aplicada.

Biogenic volatile organic compound emissions from nine tree species used in an urban tree-planting program

S. Davis, D. Helmig, R. Daly, 2014 .

Understanding mercury oxidation and air–snow exchange on the East Antarctic Plateau: a modeling study

O. Magand, D. Helmig, N. Selin, 2018, Atmospheric Chemistry and Physics.

New insights into the atmospheric mercury cycling in central Antarctica andimplications on a continental scale

O. Magand, P. Ricaud, D. Helmig, 2016 .

Influence of oil and gas emissions on ambient atmospheric non-methane hydrocarbons in residential areas of Northeastern Colorado

Detlev Helmig, D. Helmig, J. Hueber, 2014 .

Monoterpene and sesquiterpene emission estimates for the United States.

Christine Wiedinmyer, Jana Milford, Tanarit Sakulyanontvittaya, 2008, Environmental science & technology.

Seasonal ozone behavior along an elevation gradient in the Colorado Front Range Mountains

Samuel J. Oltmans, Detlev Helmig, S. Oltmans, 2010 .

Sources and seasonality of atmospheric methanol based on tall tower measurements in the US Upper Midwest

Lu Hu, T. Griffis, D. Millet, 2011 .

Biogenic volatile organic compound ambient mixing ratios and emission rates in the Alaskan Arctic tundra

Lu Hu, M. Bret-Harte, D. Millet, 2020, Biogeosciences.

Volatile organic compound emission rates from mixed deciduous and coniferous forests in Northern Wisconsin, USA

L. Vierling, C. Geron, P. Harley, 1999 .

What is causing high ozone at Summit, Greenland?

S. Oltmans, J. Dibb, D. Helmig, 2007 .

Seasonality and Source Apportionment of Nonmethane Volatile Organic Compounds at Boulder Reservoir, Colorado, Between 2017 and 2019

E. Fischer, D. Helmig, Ilana B. Pollack, 2021, Journal of Geophysical Research: Atmospheres.

Seasonal measurements of nonmethane hydrocarbons and carbon monoxide at the Mauna Loa Observatory during the Mauna Loa Observatory Photochemistry Experiment 2

P. Zimmerman, J. Greenberg, D. Helmig, 1996 .

Dynamics of ozone and nitrogen oxides at Summit, Greenland: I. Multi-year observations in the snowpack

L. Kramer, B. Dam, D. Helmig, 2015 .

Boundary-Layer Ozone Production at South Pole, Antarctica

S. Oltmans, W. Neff, S. Oncley, 2004 .

Springtime boundary layer O3 and GEM depletion at Toolik Lake, Alaska

S. Oltmans, J. Burkhart, D. Helmig, 2013 .

Corrections to "Ambient Nonmethane Hydrocarbon Levels Along Colorado's Northern Front Range: Acute and Chronic Health Risks".

Benjamin D. Blair, D. Blake, N. Blake, 2018, Environmental science & technology.

Nonmethane hydrocarbons at Pico Mountain, Azores: 2. Event-specific analyses of the impacts of mixing and photochemistry on hydrocarbon ratios

R. C. Owen, D. Parrish, D. Helmig, 2008 .

North American acetone sources determined from tall tower measurements and inverse modeling.

Lu Hu, T. Griffis, D. Millet, 2012, Atmospheric chemistry and physics.

OH, HO2, and RO2 radical chemistry in a rural forest environment: measurements, model comparisons, and evidence of a missing radical sink

Daniel C. Anderson, P. Shepson, F. Keutsch, 2023, Atmospheric Chemistry and Physics.

Atmospheric Implications of Large C2‐C5 Alkane Emissions From the U.S. Oil and Gas Industry

D. Blake, E. Mahieu, K. Strong, 2019, Journal of geophysical research. Atmospheres : JGR.

Unpiloted Aircraft System Instrument for the Rapid Collection of Whole Air Samples and Measurements for Environmental Monitoring and Air Quality Studies.

B. Stephens, D. Helmig, E. Apel, 2021, Environmental science & technology.

Surface ozone and its precursors at Summit, Greenland: comparison between observations and model simulations

L. Kramer, Shiliang Wu, D. Helmig, 2017 .

Nitric oxide in the boundary-layer at South Pole during the Antarctic Tropospheric Chemistry Investigation (ANTCI)

B. Johnson, W. Neff, D. Helmig, 2008 .

The role of ozone atmosphere-snow gas exchange on polar , boundary-layer tropospheric ozone – a review and sensitivity analysis

T. Butler, S. Oltmans, D. Helmig, 2006 .

Tropospheric Ozone Assessment Report: Database and Metrics Data of Global Surface Ozone Observations

N. Reid, A. Ding, T. Laurila, 2017 .

Low ozone dry deposition rates to sea ice during the MOSAiC field campaign: Implications for the Arctic boundary layer ozone budget

M. Shupe, G. Steeneveld, M. Krol, 2023, Elementa: Science of the Anthropocene.

Atmospheric oil and natural gas hydrocarbon trends in the Northern Colorado Front Range are notably smaller than inventory emissions reductions

E. Dlugokencky, S. Montzka, G. Pétron, 2021, Elementa: Science of the Anthropocene.

The role of snow in controlling halogen chemistry and boundary layer oxidation during Arctic spring: A 1D modelling case study

K. Tuite, L. Emmons, J. Orlando, 2021 .

Ozone Reactivity Measurement of Biogenic Volatile Organic 347 Compound Emissions

A. Guenther, D. Helmig, J. Hueber, 2021 .

Free-troposphere ozone and carbon monoxide over the North Atlantic for 2001–2011

L. Kramer, Qinbin Li, Shiliang Wu, 2013 .

The Marginal Ice Zone as a dominant source region of atmospheric mercury during central Arctic summertime

M. Shupe, T. Petäjä, Kevin M. Posman, 2023, Nature communications.

The role of ozone atmosphere-snow gas exchange on polar, boundary-layer tropospheric ozone ? a review and sensitivity analysis

S. Oltmans, D. Helmig, L. Ganzeveld, 2006 .

Approaches for quantifying reactive and low-volatility biogenic organic compound emissions by vegetation enclosure techniques - part B: applications.

J. Ortega, A. Guenther, D. Helmig, 2008, Chemosphere.

Understanding mercury oxidation and air–snow exchange on the East Antarctic Plateau: a modeling study

O. Magand, D. Helmig, N. Selin, 2018, Atmospheric Chemistry and Physics.

Analysis of particulate organics in a forest atmosphere by thermodesorption GC/MS

W. Klein, D. Helmig, Josef Müller, 1990 .

Comparison of Ozone Measurements From a Tethered Balloon Sampling Platform at South Pole Station in December, 2003

S. Oltmans, D. Helmig, Beverly J. Johnson, 2004 .

Surface ozone and its precursors at Summit, Greenland: comparison between observations and model simulations

L. Kramer, Shiliang Wu, D. Helmig, 2017 .

Photochemical evolution of continental outflow to Pico Mountain (Azores): Integrating observations with CTM simulations in lowerFT outflow.

R. C. Owen, Q. B. Li, D. Helmig, 2007 .