Articles | Volume 12, issue 6
https://doi.org/10.5194/tc-12-1939-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-12-1939-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges
Yannick Agnan
CORRESPONDING AUTHOR
Sorbonne Université, CNRS, EPHE, UMR Metis, 75252 Paris, France
Division of Atmospheric Sciences, Desert Research Institute, Reno,
Nevada 89523, USA
Thomas A. Douglas
US Army Cold Regions Research and Engineering Laboratory, PO Box
35170, Fort Wainwright, Alaska 99709, USA
Detlev Helmig
Institute of Arctic and Alpine Research, University of Colorado,
Boulder, Colorado 80309, USA
Jacques Hueber
Institute of Arctic and Alpine Research, University of Colorado,
Boulder, Colorado 80309, USA
Daniel Obrist
CORRESPONDING AUTHOR
Department of Environmental, Earth, and Atmospheric Sciences,
University of Massachusetts, Lowell, MA 01854, USA
Division of Atmospheric Sciences, Desert Research Institute, Reno,
Nevada 89523, USA
Related authors
Elisabeth Mauclet, Yannick Agnan, Catherine Hirst, Arthur Monhonval, Benoît Pereira, Aubry Vandeuren, Maëlle Villani, Justin Ledman, Meghan Taylor, Briana L. Jasinski, Edward A. G. Schuur, and Sophie Opfergelt
Biogeosciences, 19, 2333–2351, https://doi.org/10.5194/bg-19-2333-2022, https://doi.org/10.5194/bg-19-2333-2022, 2022
Short summary
Short summary
Arctic warming and permafrost degradation largely affect tundra vegetation. Wetter lowlands show an increase in sedges, whereas drier uplands favor shrub expansion. Here, we demonstrate that the difference in the foliar elemental composition of typical tundra vegetation species controls the change in local foliar elemental stock and potential mineral element cycling through litter production upon a shift in tundra vegetation.
Dean Howard, Yannick Agnan, Detlev Helmig, Yu Yang, and Daniel Obrist
Biogeosciences, 17, 4025–4042, https://doi.org/10.5194/bg-17-4025-2020, https://doi.org/10.5194/bg-17-4025-2020, 2020
Short summary
Short summary
The Arctic tundra represents a vast store of carbon that may be broken down by microbial activity into greenhouse gases such as CO2 and CH4. Though microbes are less active in winter, the long duration of the cold season makes this period very important for carbon cycling. We show that, under conditions of warmer winter air temperatures and greater snowfall, deeper soils can remain warm enough to sustain significantly enhanced CH4 emission. This could have large implications for future climates.
Martin Jiskra, Jeroen E. Sonke, Yannick Agnan, Detlev Helmig, and Daniel Obrist
Biogeosciences, 16, 4051–4064, https://doi.org/10.5194/bg-16-4051-2019, https://doi.org/10.5194/bg-16-4051-2019, 2019
Short summary
Short summary
The tundra plays a pivotal role in Arctic mercury cycling by storing atmospheric mercury deposition and shuttling it to the Arctic Ocean. We used the isotopic fingerprint of mercury to investigate the processes controlling atmospheric mercury deposition. We found that the uptake of atmospheric mercury by vegetation was the major deposition source. Direct deposition to snow or soils only played a minor role. These results improve our understanding of Arctic mercury cycling.
Andrew O. Langford, Raul J. Alvarez II, Kenneth C. Aikin, Sunil Baidar, W. Alan Brewer, Steven S. Brown, Matthew M. Coggan, Patrick D. Cullis, Jessica Gilman, Georgios I. Gkatzelis, Detlev Helmig, Bryan J. Johnson, K. Emma Knowland, Rajesh Kumar, Aaron D. Lamplugh, Audra McClure-Begley, Brandi J. McCarty, Ann M. Middlebrook, Gabriele Pfister, Jeff Peischl, Irina Petropavlovskikh, Pamela S. Rickley, Andrew W. Rollins, Scott P. Sandberg, Christoph J. Senff, and Carsten Warneke
EGUsphere, https://doi.org/10.5194/egusphere-2024-1938, https://doi.org/10.5194/egusphere-2024-1938, 2024
Short summary
Short summary
High ozone (O3) formed by reactions of nitrogen oxides (NOx) and volatile organic compounds (VOCs) can harm human health and welfare. High O3 is usually associated with hot summer days, but under certain conditions, high O3 can also form under winter conditions. In this study, we describe a high O3 event that occurred in Colorado during the COVID-19 quarantine that was caused in part by the decrease in traffic, and in part by a shallow inversion created by descent of stratospheric air.
Matthew J. Rowlinson, Mat J. Evans, Lucy J. Carpenter, Katie A. Read, Shalini Punjabi, Adedayo Adedeji, Luke Fakes, Ally Lewis, Ben Richmond, Neil Passant, Tim Murrells, Barron Henderson, Kelvin H. Bates, and Detlev Helmig
Atmos. Chem. Phys., 24, 8317–8342, https://doi.org/10.5194/acp-24-8317-2024, https://doi.org/10.5194/acp-24-8317-2024, 2024
Short summary
Short summary
Ethane and propane are volatile organic compounds emitted from human activities which help to form ozone, a pollutant and greenhouse gas, and also affect the chemistry of the lower atmosphere. Atmospheric models tend to do a poor job of reproducing the abundance of these compounds in the atmosphere. By using regional estimates of their emissions, rather than globally consistent estimates, we can significantly improve the simulation of ethane in the model and make some improvement for propane.
Charles E. Miller, Peter C. Griffith, Elizabeth Hoy, Naiara S. Pinto, Yunling Lou, Scott Hensley, Bruce D. Chapman, Jennifer Baltzer, Kazem Bakian-Dogaheh, W. Robert Bolton, Laura Bourgeau-Chavez, Richard H. Chen, Byung-Hun Choe, Leah K. Clayton, Thomas A. Douglas, Nancy French, Jean E. Holloway, Gang Hong, Lingcao Huang, Go Iwahana, Liza Jenkins, John S. Kimball, Tatiana Loboda, Michelle Mack, Philip Marsh, Roger J. Michaelides, Mahta Moghaddam, Andrew Parsekian, Kevin Schaefer, Paul R. Siqueira, Debjani Singh, Alireza Tabatabaeenejad, Merritt Turetsky, Ridha Touzi, Elizabeth Wig, Cathy J. Wilson, Paul Wilson, Stan D. Wullschleger, Yonghong Yi, Howard A. Zebker, Yu Zhang, Yuhuan Zhao, and Scott J. Goetz
Earth Syst. Sci. Data, 16, 2605–2624, https://doi.org/10.5194/essd-16-2605-2024, https://doi.org/10.5194/essd-16-2605-2024, 2024
Short summary
Short summary
NASA’s Arctic Boreal Vulnerability Experiment (ABoVE) conducted airborne synthetic aperture radar (SAR) surveys of over 120 000 km2 in Alaska and northwestern Canada during 2017, 2018, 2019, and 2022. This paper summarizes those results and provides links to details on ~ 80 individual flight lines. This paper is presented as a guide to enable interested readers to fully explore the ABoVE L- and P-band SAR data.
Ting Wang, Buyun Du, Inke Forbrich, Jun Zhou, Joshua Polen, Elsie M. Sunderland, Prentiss H. Balcom, Celia Chen, and Daniel Obrist
Biogeosciences, 21, 1461–1476, https://doi.org/10.5194/bg-21-1461-2024, https://doi.org/10.5194/bg-21-1461-2024, 2024
Short summary
Short summary
The strong seasonal increases of Hg in aboveground biomass during the growing season and the lack of changes observed after senescence in this salt marsh ecosystem suggest physiologically controlled Hg uptake pathways. The Hg sources found in marsh aboveground tissues originate from a mix of sources, unlike terrestrial ecosystems, where atmospheric GEM is the main source. Belowground plant tissues mostly take up Hg from soils. Overall, the salt marsh currently serves as a small net Hg sink.
Kevin R. Barry, Thomas C. J. Hill, Marina Nieto-Caballero, Thomas A. Douglas, Sonia M. Kreidenweis, Paul J. DeMott, and Jessie M. Creamean
Atmos. Chem. Phys., 23, 15783–15793, https://doi.org/10.5194/acp-23-15783-2023, https://doi.org/10.5194/acp-23-15783-2023, 2023
Short summary
Short summary
Ice-nucleating particles (INPs) are important for the climate due to their influence on cloud properties. To understand potential land-based sources of them in the Arctic, we carried out a survey near the northernmost point of Alaska, a landscape connected to the permafrost (thermokarst). Permafrost contained high concentrations of INPs, with the largest values near the coast. The thermokarst lakes were found to emit INPs, and the water contained elevated concentrations.
Brandon Bottorff, Michelle M. Lew, Youngjun Woo, Pamela Rickly, Matthew D. Rollings, Benjamin Deming, Daniel C. Anderson, Ezra Wood, Hariprasad D. Alwe, Dylan B. Millet, Andrew Weinheimer, Geoff Tyndall, John Ortega, Sebastien Dusanter, Thierry Leonardis, James Flynn, Matt Erickson, Sergio Alvarez, Jean C. Rivera-Rios, Joshua D. Shutter, Frank Keutsch, Detlev Helmig, Wei Wang, Hannah M. Allen, Johnathan H. Slade, Paul B. Shepson, Steven Bertman, and Philip S. Stevens
Atmos. Chem. Phys., 23, 10287–10311, https://doi.org/10.5194/acp-23-10287-2023, https://doi.org/10.5194/acp-23-10287-2023, 2023
Short summary
Short summary
The hydroxyl (OH), hydroperoxy (HO2), and organic peroxy (RO2) radicals play important roles in atmospheric chemistry and have significant air quality implications. Here, we compare measurements of OH, HO2, and total peroxy radicals (XO2) made in a remote forest in Michigan, USA, to predictions from a series of chemical models. Lower measured radical concentrations suggest that the models may be missing an important radical sink and overestimating the rate of ozone production in this forest.
Vanessa Selimovic, Damien Ketcherside, Sreelekha Chaliyakunnel, Catherine Wielgasz, Wade Permar, Hélène Angot, Dylan B. Millet, Alan Fried, Detlev Helmig, and Lu Hu
Atmos. Chem. Phys., 22, 14037–14058, https://doi.org/10.5194/acp-22-14037-2022, https://doi.org/10.5194/acp-22-14037-2022, 2022
Short summary
Short summary
Arctic warming has led to an increase in plants that emit gases in response to stress, but how these gases affect regional chemistry is largely unknown due to lack of observational data. Here we present the most comprehensive gas-phase measurements for this area to date and compare them to predictions from a global transport model. We report 78 gas-phase species and investigate their importance to atmospheric chemistry in the area, with broader implications for similar plant types.
Detlev Helmig, Alex Guenther, Jacques Hueber, Ryan Daly, Wei Wang, Jeong-Hoo Park, Anssi Liikanen, and Arnaud P. Praplan
Atmos. Meas. Tech., 15, 5439–5454, https://doi.org/10.5194/amt-15-5439-2022, https://doi.org/10.5194/amt-15-5439-2022, 2022
Short summary
Short summary
This research demonstrates a new method for determination of the chemical reactivity of volatile organic compounds that are emitted from the leaves and needles of trees. These measurements allow elucidating if and how much of these emissions and their associated reactivity are captured and quantified by currently applicable chemical analysis methods.
Albane Barbero, Roberto Grilli, Markus M. Frey, Camille Blouzon, Detlev Helmig, Nicolas Caillon, and Joël Savarino
Atmos. Chem. Phys., 22, 12025–12054, https://doi.org/10.5194/acp-22-12025-2022, https://doi.org/10.5194/acp-22-12025-2022, 2022
Short summary
Short summary
The high reactivity of the summer Antarctic boundary layer results in part from the emissions of nitrogen oxides produced during photo-denitrification of the snowpack, but its underlying mechanisms are not yet fully understood. The results of this study suggest that more NO2 is produced from the snowpack early in the photolytic season, possibly due to stronger UV irradiance caused by a smaller solar zenith angle near the solstice.
Elisabeth Mauclet, Yannick Agnan, Catherine Hirst, Arthur Monhonval, Benoît Pereira, Aubry Vandeuren, Maëlle Villani, Justin Ledman, Meghan Taylor, Briana L. Jasinski, Edward A. G. Schuur, and Sophie Opfergelt
Biogeosciences, 19, 2333–2351, https://doi.org/10.5194/bg-19-2333-2022, https://doi.org/10.5194/bg-19-2333-2022, 2022
Short summary
Short summary
Arctic warming and permafrost degradation largely affect tundra vegetation. Wetter lowlands show an increase in sedges, whereas drier uplands favor shrub expansion. Here, we demonstrate that the difference in the foliar elemental composition of typical tundra vegetation species controls the change in local foliar elemental stock and potential mineral element cycling through litter production upon a shift in tundra vegetation.
Hélène Angot, Connor Davel, Christine Wiedinmyer, Gabrielle Pétron, Jashan Chopra, Jacques Hueber, Brendan Blanchard, Ilann Bourgeois, Isaac Vimont, Stephen A. Montzka, Ben R. Miller, James W. Elkins, and Detlev Helmig
Atmos. Chem. Phys., 21, 15153–15170, https://doi.org/10.5194/acp-21-15153-2021, https://doi.org/10.5194/acp-21-15153-2021, 2021
Short summary
Short summary
After a multidecadal global decline in atmospheric abundance of ethane and propane (precursors of tropospheric ozone and aerosols), previous work showed a reversal of this trend in 2009–2015 in the Northern Hemisphere due to the growth in oil and natural gas production in North America. Here we show a temporary pause in the growth of atmospheric ethane and propane in 2015–2018 and highlight the critical need for additional top-down studies to further constrain ethane and propane emissions.
Hélène Angot, Katelyn McErlean, Lu Hu, Dylan B. Millet, Jacques Hueber, Kaixin Cui, Jacob Moss, Catherine Wielgasz, Tyler Milligan, Damien Ketcherside, M. Syndonia Bret-Harte, and Detlev Helmig
Biogeosciences, 17, 6219–6236, https://doi.org/10.5194/bg-17-6219-2020, https://doi.org/10.5194/bg-17-6219-2020, 2020
Short summary
Short summary
We report biogenic volatile organic compounds (BVOCs) ambient levels and emission rates from key vegetation species in the Alaskan arctic tundra, providing a new data set to further constrain isoprene chemistry under low NOx conditions in models. We add to the growing body of evidence that climate-induced changes in the vegetation composition will significantly affect the BVOC emission potential of the tundra, with implications for atmospheric oxidation processes and climate feedbacks.
Wei Wang, Laurens Ganzeveld, Samuel Rossabi, Jacques Hueber, and Detlev Helmig
Atmos. Chem. Phys., 20, 11287–11304, https://doi.org/10.5194/acp-20-11287-2020, https://doi.org/10.5194/acp-20-11287-2020, 2020
Short summary
Short summary
Trees exchange with the atmosphere nitrogen oxides and ozone, affecting the tropospheric composition and consequently air quality and ecosystem health. We examined the leaf-level gas exchanges for four typical tree species (pine, maple, oak, aspen) found in northern Michigan, US. The leaves largely absorb the gases, showing little evidence of emission. We measured the uptake rates that can be used to improve model studies of the source and sink processes controlling these gases in forests.
Dean Howard, Yannick Agnan, Detlev Helmig, Yu Yang, and Daniel Obrist
Biogeosciences, 17, 4025–4042, https://doi.org/10.5194/bg-17-4025-2020, https://doi.org/10.5194/bg-17-4025-2020, 2020
Short summary
Short summary
The Arctic tundra represents a vast store of carbon that may be broken down by microbial activity into greenhouse gases such as CO2 and CH4. Though microbes are less active in winter, the long duration of the cold season makes this period very important for carbon cycling. We show that, under conditions of warmer winter air temperatures and greater snowfall, deeper soils can remain warm enough to sustain significantly enhanced CH4 emission. This could have large implications for future climates.
Ryan J. Pound, Tomás Sherwen, Detlev Helmig, Lucy J. Carpenter, and Mat J. Evans
Atmos. Chem. Phys., 20, 4227–4239, https://doi.org/10.5194/acp-20-4227-2020, https://doi.org/10.5194/acp-20-4227-2020, 2020
Short summary
Short summary
Ozone is an important pollutant with impacts on health and the environment. Ozone is lost to plants, land and the oceans. Loss to the ocean is slow compared to all other types of land cover and has not received as much attention. We build on previous work to more accurately model ozone loss to the ocean. We find changes in the concentration of ozone over the oceans, notably the Southern Ocean, which improves model performance.
Detlev Helmig, Daniel Liptzin, Jacques Hueber, and Joel Savarino
The Cryosphere, 14, 199–209, https://doi.org/10.5194/tc-14-199-2020, https://doi.org/10.5194/tc-14-199-2020, 2020
Short summary
Short summary
We present 15 months of trace gas observations from air withdrawn within the snowpack and from above the snow at Concordia Station in Antarctica. The data show occasional positive spikes, indicative of pollution from the station generator. The pollution signal can be seen in snowpack air shortly after it is observed above the snow surface, and lasting for up to several days, much longer than above the surface.
Martin Jiskra, Jeroen E. Sonke, Yannick Agnan, Detlev Helmig, and Daniel Obrist
Biogeosciences, 16, 4051–4064, https://doi.org/10.5194/bg-16-4051-2019, https://doi.org/10.5194/bg-16-4051-2019, 2019
Short summary
Short summary
The tundra plays a pivotal role in Arctic mercury cycling by storing atmospheric mercury deposition and shuttling it to the Arctic Ocean. We used the isotopic fingerprint of mercury to investigate the processes controlling atmospheric mercury deposition. We found that the uptake of atmospheric mercury by vegetation was the major deposition source. Direct deposition to snow or soils only played a minor role. These results improve our understanding of Arctic mercury cycling.
Christopher Pearson, Dean Howard, Christopher Moore, and Daniel Obrist
Atmos. Chem. Phys., 19, 6913–6929, https://doi.org/10.5194/acp-19-6913-2019, https://doi.org/10.5194/acp-19-6913-2019, 2019
Short summary
Short summary
Precipitation-based deposition of mercury and other trace metals throughout Alaska provides a significant input of pollutants. Deposition shows significant seasonal and spatial variability, largely driven by precipitation patterns. Annual wet deposition of Hg at all AK collection sites is consistently lower than other monitoring stations throughout the CONUS. Hg showed no clear relationship to other metals, likely due to its highly volatile nature and capability of long-range transport.
Shaojie Song, Hélène Angot, Noelle E. Selin, Hubert Gallée, Francesca Sprovieri, Nicola Pirrone, Detlev Helmig, Joël Savarino, Olivier Magand, and Aurélien Dommergue
Atmos. Chem. Phys., 18, 15825–15840, https://doi.org/10.5194/acp-18-15825-2018, https://doi.org/10.5194/acp-18-15825-2018, 2018
Short summary
Short summary
Mercury is a trace metal with adverse health effects on human and wildlife. Its unique property makes it undergo long-range transport, and even remote Antarctica receives significant inputs. This paper presents the first model that aims to understand mercury behavior over the Antarctic Plateau. We find that mercury is quickly cycled between snow and air in the sunlit period, likely driven by bromine chemistry, and that several uncertain processes contribute to its behavior in the dark period.
Yaoxian Huang, Shiliang Wu, Louisa J. Kramer, Detlev Helmig, and Richard E. Honrath
Atmos. Chem. Phys., 17, 14661–14674, https://doi.org/10.5194/acp-17-14661-2017, https://doi.org/10.5194/acp-17-14661-2017, 2017
Short summary
Short summary
A global chemical transport model (GEOS-Chem) was employed to simulate surface ozone and its precursors at Summit, Greenland in the Arctic and compare them with 2-year in situ surface observations. The model performed well in simulating certain species (such as carbon monoxide and propane), but some significant discrepancies were identified for other species (e.g., nitrogen oxides, ethane, PAN, and ozone). We further investigated the exact causes for model–data biases.
Mike J. Newland, Patricia Martinerie, Emmanuel Witrant, Detlev Helmig, David R. Worton, Chris Hogan, William T. Sturges, and Claire E. Reeves
Atmos. Chem. Phys., 17, 8269–8283, https://doi.org/10.5194/acp-17-8269-2017, https://doi.org/10.5194/acp-17-8269-2017, 2017
Short summary
Short summary
We report increasing levels of alkyl nitrates in the Northern Hemisphere atmosphere between 1960 and the mid-1990s. These increases are symptomatic of large-scale changes to the chemical composition of the atmosphere, particularly with regards to the amounts of short-lived, reactive species. The observed increases are likely driven by increasing levels of nitrogen oxides. These changes have direct implications for the lifetimes of climate-relevant species in the atmosphere, such as methane.
Qian Zhao, Simon R. Poulson, Daniel Obrist, Samira Sumaila, James J. Dynes, Joyce M. McBeth, and Yu Yang
Biogeosciences, 13, 4777–4788, https://doi.org/10.5194/bg-13-4777-2016, https://doi.org/10.5194/bg-13-4777-2016, 2016
Short summary
Short summary
To mitigate the harmful effects of global climate change, it is essential to completely understand the cycles of carbon. In this study, we found the iron oxides play an important role in regulating the accumulation of carbon in forest soil, and uncovered the governing factors for the spatial variability and characteristics of iron-bound organic carbon. Such information is important for predicting the turnover of carbon in global soils.
Hélène Angot, Olivier Magand, Detlev Helmig, Philippe Ricaud, Boris Quennehen, Hubert Gallée, Massimo Del Guasta, Francesca Sprovieri, Nicola Pirrone, Joël Savarino, and Aurélien Dommergue
Atmos. Chem. Phys., 16, 8249–8264, https://doi.org/10.5194/acp-16-8249-2016, https://doi.org/10.5194/acp-16-8249-2016, 2016
Short summary
Short summary
While the Arctic has been extensively monitored, there is still much to be learned from the Antarctic continent regarding the processes that govern the budget of atmospheric mercury species. We report here the first year-round measurements of gaseous elemental mercury (Hg(0)) in the atmosphere and in snowpack interstitial air on the East Antarctic ice sheet. The striking reactivity observed on the Antarctic plateau most likely influences the cycle of atmospheric mercury on a continental scale.
Michel Legrand, Susanne Preunkert, Joël Savarino, Markus M. Frey, Alexandre Kukui, Detlev Helmig, Bruno Jourdain, Anna E. Jones, Rolf Weller, Neil Brough, and Hubert Gallée
Atmos. Chem. Phys., 16, 8053–8069, https://doi.org/10.5194/acp-16-8053-2016, https://doi.org/10.5194/acp-16-8053-2016, 2016
Short summary
Short summary
Surface ozone, the most abundant atmospheric oxidant, has been measured since 2004 at the coastal East Antarctic site of Dumont d’Urville, and since 2007 at the Concordia station located on the high East Antarctic plateau. Long-term changes, seasonal and diurnal cycles, as well as inter-annual summer variability observed at these two East Antarctic sites are discussed. Influences like sea ice extent and outflow from inland Antarctica are discussed.
L. J. Kramer, D. Helmig, J. F. Burkhart, A. Stohl, S. Oltmans, and R. E. Honrath
Atmos. Chem. Phys., 15, 6827–6849, https://doi.org/10.5194/acp-15-6827-2015, https://doi.org/10.5194/acp-15-6827-2015, 2015
L. K. Emmons, S. R. Arnold, S. A. Monks, V. Huijnen, S. Tilmes, K. S. Law, J. L. Thomas, J.-C. Raut, I. Bouarar, S. Turquety, Y. Long, B. Duncan, S. Steenrod, S. Strode, J. Flemming, J. Mao, J. Langner, A. M. Thompson, D. Tarasick, E. C. Apel, D. R. Blake, R. C. Cohen, J. Dibb, G. S. Diskin, A. Fried, S. R. Hall, L. G. Huey, A. J. Weinheimer, A. Wisthaler, T. Mikoviny, J. Nowak, J. Peischl, J. M. Roberts, T. Ryerson, C. Warneke, and D. Helmig
Atmos. Chem. Phys., 15, 6721–6744, https://doi.org/10.5194/acp-15-6721-2015, https://doi.org/10.5194/acp-15-6721-2015, 2015
Short summary
Short summary
Eleven 3-D tropospheric chemistry models have been compared and evaluated with observations in the Arctic during the International Polar Year (IPY 2008). Large differences are seen among the models, particularly related to the model chemistry of volatile organic compounds (VOCs) and reactive nitrogen (NOx, PAN, HNO3) partitioning. Consistency among the models in the underestimation of CO, ethane and propane indicates the emission inventory is too low for these compounds.
S. Preunkert, M. Legrand, M. M. Frey, A. Kukui, J. Savarino, H. Gallée, M. King, B. Jourdain, W. Vicars, and D. Helmig
Atmos. Chem. Phys., 15, 6689–6705, https://doi.org/10.5194/acp-15-6689-2015, https://doi.org/10.5194/acp-15-6689-2015, 2015
Short summary
Short summary
During two austral summers HCHO was investigated in air, snow, and interstitial air at the Concordia site located on the East Antarctic Plateau. Snow emission fluxes were estimated to be around 1 to 2 and 3 to 5 x 10^12 molecules m-2 s-1 at night and at noon, respectively. Shading experiments suggest that the photochemical HCHO production in the snowpack at Concordia remains negligible. The mean HCHO level of 130pptv observed at 1m above the surface is quite well reproduced by 1-D simulations.
C. Pearson, R. Schumer, B. D. Trustman, K. Rittger, D. W. Johnson, and D. Obrist
Biogeosciences, 12, 3665–3680, https://doi.org/10.5194/bg-12-3665-2015, https://doi.org/10.5194/bg-12-3665-2015, 2015
Short summary
Short summary
Snowpack and precipitation samples were collected along two elevation gradients in the Tahoe Basin during winter and spring from 2011 to 2014 to evaluate spatial and temporal deposition patterns of nitrogen, phosphorus, and mercury. Study results reflect the highly dynamic nature of snowpack chemical storage, while basin-wide estimates identify snowpack chemical loading from atmospheric deposition as a substantial source of nutrient and pollutant input to the Lake Tahoe watershed each year.
K. Dzepina, C. Mazzoleni, P. Fialho, S. China, B. Zhang, R. C. Owen, D. Helmig, J. Hueber, S. Kumar, J. A. Perlinger, L. J. Kramer, M. P. Dziobak, M. T. Ampadu, S. Olsen, D. J. Wuebbles, and L. R. Mazzoleni
Atmos. Chem. Phys., 15, 5047–5068, https://doi.org/10.5194/acp-15-5047-2015, https://doi.org/10.5194/acp-15-5047-2015, 2015
Short summary
Short summary
Aerosol was sampled at the Pico Mountain Observatory located at 2.2km amsl on Pico Island of the North Atlantic Azores archipelago. Two aerosol samples characterized by ultrahigh resolution mass spectrometry had biomass burning and marine emissions origins, as corroborated by collocated gas- and particle-phase measurements, air masses analyses and satellites. The paper presents the first molecular characterization of aged and processed aerosol intercepted at a remote lower free troposphere
P. Weiss-Penzias, H. M. Amos, N. E. Selin, M. S. Gustin, D. A. Jaffe, D. Obrist, G.-R. Sheu, and A. Giang
Atmos. Chem. Phys., 15, 1161–1173, https://doi.org/10.5194/acp-15-1161-2015, https://doi.org/10.5194/acp-15-1161-2015, 2015
Short summary
Short summary
Speciated atmospheric Hg measurements from five high-elevation sites were compared with a global mercury model. The comparison confirmed that reactive mercury is formed in dry free tropospheric air from the oxidation of elemental Hg, more so in the summer than in other seasons. Simulations run with OH-O3 oxidation instead of the Br oxidation mechanism compared more closely with observations at desert sites, suggesting future simulations should include multiple reaction mechanisms simultaneously.
R. Ahmadov, S. McKeen, M. Trainer, R. Banta, A. Brewer, S. Brown, P. M. Edwards, J. A. de Gouw, G. J. Frost, J. Gilman, D. Helmig, B. Johnson, A. Karion, A. Koss, A. Langford, B. Lerner, J. Olson, S. Oltmans, J. Peischl, G. Pétron, Y. Pichugina, J. M. Roberts, T. Ryerson, R. Schnell, C. Senff, C. Sweeney, C. Thompson, P. R. Veres, C. Warneke, R. Wild, E. J. Williams, B. Yuan, and R. Zamora
Atmos. Chem. Phys., 15, 411–429, https://doi.org/10.5194/acp-15-411-2015, https://doi.org/10.5194/acp-15-411-2015, 2015
Short summary
Short summary
High 2013 wintertime O3 pollution events associated with oil/gas production within the Uinta Basin are studied using a 3D model. It's able quantitatively to reproduce these events using emission estimates of O3 precursors based on ambient measurements (top-down approach), but unable to reproduce them using a recent bottom-up emission inventory for the oil/gas industry. The role of various physical and meteorological processes, chemical species and pathways contributing to high O3 are quantified.
S. J. Lawson, P. W. Selleck, I. E. Galbally, M. D. Keywood, M. J. Harvey, C. Lerot, D. Helmig, and Z. Ristovski
Atmos. Chem. Phys., 15, 223–240, https://doi.org/10.5194/acp-15-223-2015, https://doi.org/10.5194/acp-15-223-2015, 2015
Short summary
Short summary
Glyoxal and methylglyoxal are short-lived organic trace gases and important precursors of secondary organic aerosol. Measurements over oceans are sparse. We present the first in situ glyoxal and methylglyoxal observations over remote temperate oceans, alongside observations of precursor gases. Precursor gases cannot explain observed mixing ratios, highlighting an unknown source. We show a large discrepancy between calculated vertical column densities of glyoxal and those retrieved by satellite.
S. J. Oltmans, A. Karion, R. C. Schnell, G. Pétron, C. Sweeney, S. Wolter, D. Neff, S. A. Montzka, B. R. Miller, D. Helmig, B. J. Johnson, and J. Hueber
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acpd-14-20117-2014, https://doi.org/10.5194/acpd-14-20117-2014, 2014
Revised manuscript not accepted
P. Boylan, D. Helmig, and J.-H. Park
Atmos. Meas. Tech., 7, 1231–1244, https://doi.org/10.5194/amt-7-1231-2014, https://doi.org/10.5194/amt-7-1231-2014, 2014
B. Zhang, R. C. Owen, J. A. Perlinger, A. Kumar, S. Wu, M. Val Martin, L. Kramer, D. Helmig, and R. E. Honrath
Atmos. Chem. Phys., 14, 2267–2287, https://doi.org/10.5194/acp-14-2267-2014, https://doi.org/10.5194/acp-14-2267-2014, 2014
D. Helmig, V. Petrenko, P. Martinerie, E. Witrant, T. Röckmann, A. Zuiderweg, R. Holzinger, J. Hueber, C. Thompson, J. W. C. White, W. Sturges, A. Baker, T. Blunier, D. Etheridge, M. Rubino, and P. Tans
Atmos. Chem. Phys., 14, 1463–1483, https://doi.org/10.5194/acp-14-1463-2014, https://doi.org/10.5194/acp-14-1463-2014, 2014
A. Kumar, S. Wu, M. F. Weise, R. Honrath, R. C. Owen, D. Helmig, L. Kramer, M. Val Martin, and Q. Li
Atmos. Chem. Phys., 13, 12537–12547, https://doi.org/10.5194/acp-13-12537-2013, https://doi.org/10.5194/acp-13-12537-2013, 2013
P. M. Edwards, C. J. Young, K. Aikin, J. deGouw, W. P. Dubé, F. Geiger, J. Gilman, D. Helmig, J. S. Holloway, J. Kercher, B. Lerner, R. Martin, R. McLaren, D. D. Parrish, J. Peischl, J. M. Roberts, T. B. Ryerson, J. Thornton, C. Warneke, E. J. Williams, and S. S. Brown
Atmos. Chem. Phys., 13, 8955–8971, https://doi.org/10.5194/acp-13-8955-2013, https://doi.org/10.5194/acp-13-8955-2013, 2013
P. I. Palmer, M. Parrington, J. D. Lee, A. C. Lewis, A. R. Rickard, P. F. Bernath, T. J. Duck, D. L. Waugh, D. W. Tarasick, S. Andrews, E. Aruffo, L. J. Bailey, E. Barrett, S. J.-B. Bauguitte, K. R. Curry, P. Di Carlo, L. Chisholm, L. Dan, G. Forster, J. E. Franklin, M. D. Gibson, D. Griffin, D. Helmig, J. R. Hopkins, J. T. Hopper, M. E. Jenkin, D. Kindred, J. Kliever, M. Le Breton, S. Matthiesen, M. Maurice, S. Moller, D. P. Moore, D. E. Oram, S. J. O'Shea, R. C. Owen, C. M. L. S. Pagniello, S. Pawson, C. J. Percival, J. R. Pierce, S. Punjabi, R. M. Purvis, J. J. Remedios, K. M. Rotermund, K. M. Sakamoto, A. M. da Silva, K. B. Strawbridge, K. Strong, J. Taylor, R. Trigwell, K. A. Tereszchuk, K. A. Walker, D. Weaver, C. Whaley, and J. C. Young
Atmos. Chem. Phys., 13, 6239–6261, https://doi.org/10.5194/acp-13-6239-2013, https://doi.org/10.5194/acp-13-6239-2013, 2013
X. Faïn, D. Helmig, J. Hueber, D. Obrist, and M. W. Williams
Biogeosciences, 10, 3793–3807, https://doi.org/10.5194/bg-10-3793-2013, https://doi.org/10.5194/bg-10-3793-2013, 2013
A. Pierce, D. Obrist, H. Moosmüller, X. Faïn, and C. Moore
Atmos. Meas. Tech., 6, 1477–1489, https://doi.org/10.5194/amt-6-1477-2013, https://doi.org/10.5194/amt-6-1477-2013, 2013
O. Hararuk, D. Obrist, and Y. Luo
Biogeosciences, 10, 2393–2407, https://doi.org/10.5194/bg-10-2393-2013, https://doi.org/10.5194/bg-10-2393-2013, 2013
L. Hu, D. B. Millet, S. Y. Kim, K. C. Wells, T. J. Griffis, E. V. Fischer, D. Helmig, J. Hueber, and A. J. Curtis
Atmos. Chem. Phys., 13, 3379–3392, https://doi.org/10.5194/acp-13-3379-2013, https://doi.org/10.5194/acp-13-3379-2013, 2013
Related subject area
Discipline: Snow | Subject: Snow Chemistry
200-year ice core bromine reconstruction at Dome C (Antarctica): observational and modelling results
Impacts of post-depositional processing on nitrate isotopes in the snow and the overlying atmosphere at Summit, Greenland
Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack
Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study
Brief communication: Spatial and temporal variations in surface snow chemistry along a traverse from coastal East Antarctica to the ice sheet summit (Dome A)
Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice
Quantifying the light absorption and source attribution of insoluble light-absorbing particles on Tibetan Plateau glaciers between 2013 and 2015
Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica
François Burgay, Rafael Pedro Fernández, Delia Segato, Clara Turetta, Christopher S. Blaszczak-Boxe, Rachael H. Rhodes, Claudio Scarchilli, Virginia Ciardini, Carlo Barbante, Alfonso Saiz-Lopez, and Andrea Spolaor
The Cryosphere, 17, 391–405, https://doi.org/10.5194/tc-17-391-2023, https://doi.org/10.5194/tc-17-391-2023, 2023
Short summary
Short summary
The paper presents the first ice-core record of bromine (Br) in the Antarctic plateau. By the observation of the ice core and the application of atmospheric chemical models, we investigate the behaviour of bromine after its deposition into the snowpack, with interest in the effect of UV radiation change connected to the formation of the ozone hole, the role of volcanic deposition, and the possible use of Br to reconstruct past sea ice changes from ice core collect in the inner Antarctic plateau.
Zhuang Jiang, Joel Savarino, Becky Alexander, Joseph Erbland, Jean-Luc Jaffrezo, and Lei Geng
The Cryosphere, 16, 2709–2724, https://doi.org/10.5194/tc-16-2709-2022, https://doi.org/10.5194/tc-16-2709-2022, 2022
Short summary
Short summary
A record of year-round atmospheric nitrate isotopic composition along with snow nitrate isotopic data from Summit, Greenland, revealed apparent enrichments in nitrogen isotopes in snow nitrate compared to atmospheric nitrate, in addition to a relatively smaller degree of changes in oxygen isotopes. The results suggest that at this site post-depositional processing takes effect, which should be taken into account when interpreting ice-core nitrate isotope records.
Yuying Chen, Keshao Liu, Yongqin Liu, Trista J. Vick-Majors, Feng Wang, and Mukan Ji
The Cryosphere, 16, 1265–1280, https://doi.org/10.5194/tc-16-1265-2022, https://doi.org/10.5194/tc-16-1265-2022, 2022
Short summary
Short summary
We investigated the bacterial communities in surface and subsurface snow samples in a Tibetan Plateau glacier using 16S rRNA gene sequences. Our results revealed rapid temporal changes in nitrogen (including nitrate and ammonium) and bacterial communities in both surface and subsurface snow. These findings advance our understanding of bacterial community variations and bacterial interactions after snow deposition and provide a possible biological explanation for nitrogen dynamics in snow.
Zhuang Jiang, Becky Alexander, Joel Savarino, Joseph Erbland, and Lei Geng
The Cryosphere, 15, 4207–4220, https://doi.org/10.5194/tc-15-4207-2021, https://doi.org/10.5194/tc-15-4207-2021, 2021
Short summary
Short summary
We used a snow photochemistry model (TRANSITS) to simulate the seasonal nitrate snow profile at Summit, Greenland. Comparisons between model outputs and observations suggest that at Summit post-depositional processing is active and probably dominates the snowpack δ15N seasonality. We also used the model to assess the degree of snow nitrate loss and the consequences in its isotopes at present and in the past, which helps for quantitative interpretations of ice-core nitrate records.
Guitao Shi, Hongmei Ma, Zhengyi Hu, Zhenlou Chen, Chunlei An, Su Jiang, Yuansheng Li, Tianming Ma, Jinhai Yu, Danhe Wang, Siyu Lu, Bo Sun, and Meredith G. Hastings
The Cryosphere, 15, 1087–1095, https://doi.org/10.5194/tc-15-1087-2021, https://doi.org/10.5194/tc-15-1087-2021, 2021
Short summary
Short summary
It is important to understand atmospheric chemistry over Antarctica under a changing climate. Thus snow collected on a traverse from the coast to Dome A was used to investigate variations in snow chemistry. The non-sea-salt fractions of K+, Mg2+, and Ca2+ are associated with terrestrial inputs, and nssCl− is from HCl. In general, proportions of non-sea-salt fractions of ions to the totals are higher in the interior areas than on the coast, and the proportions are higher in summer than in winter.
Tingfeng Dou, Zhiheng Du, Shutong Li, Yulan Zhang, Qi Zhang, Mingju Hao, Chuanjin Li, Biao Tian, Minghu Ding, and Cunde Xiao
The Cryosphere, 13, 3309–3316, https://doi.org/10.5194/tc-13-3309-2019, https://doi.org/10.5194/tc-13-3309-2019, 2019
Short summary
Short summary
The meltwater scavenging coefficient (MSC) determines the BC enrichment in the surface layer of melting snow and therefore modulates the BC-snow-albedo feedbacks. This study presents a new method for MSC estimation over the sea-ice area in Arctic. Using this new method, we analyze the spatial variability of MSC in the western Arctic and demonstrate that the value in Canada Basin (23.6 % ± 2.1 %) ≈ that in Greenland (23.0 % ± 12.5 %) > that in Chukchi Sea (17.9 % ± 5.0 %) > that in Elson Lagoon (14.5 % ± 2.6 %).
Xin Wang, Hailun Wei, Jun Liu, Baiqing Xu, Mo Wang, Mingxia Ji, and Hongchun Jin
The Cryosphere, 13, 309–324, https://doi.org/10.5194/tc-13-309-2019, https://doi.org/10.5194/tc-13-309-2019, 2019
Short summary
Short summary
A large survey on measuring optical and chemical properties of insoluble light-absorbing impurities (ILAPs) from seven glaciers was conducted on the Tibetan Plateau (TP) during 2013–2015. The results indicated that the mixing ratios of black carbon (BC), organic carbon (OC), and iron (Fe) all showed a tendency to decrease from north to south, and the industrial pollution (33.1 %), biomass and biofuel burning (29.4 %), and soil dust (37.5 %) were the major sources of the ILAPs on the TP.
Carmen Paulina Vega, Elisabeth Isaksson, Elisabeth Schlosser, Dmitry Divine, Tõnu Martma, Robert Mulvaney, Anja Eichler, and Margit Schwikowski-Gigar
The Cryosphere, 12, 1681–1697, https://doi.org/10.5194/tc-12-1681-2018, https://doi.org/10.5194/tc-12-1681-2018, 2018
Short summary
Short summary
Ions were measured in firn and ice cores from Fimbul Ice Shelf, Antarctica, to evaluate sea-salt loads. A significant sixfold increase in sea salts was found in the S100 core after 1950s which suggests that it contains a more local sea-salt signal, dominated by processes during sea-ice formation in the neighbouring waters. In contrast, firn cores from three ice rises register the larger-scale signal of atmospheric flow conditions and transport of sea-salt aerosols produced over open water.
Cited articles
Alaska Division of Oil and Gas: Regional geology of the north slope of
Alaska, 1 ∕ 1 000 000, State of Alaska, Department of Natural
Resources, Division of Oil and Gas, Anchorage, 2008.
Angot, H., Dastoor, A., De Simone, F., Gårdfeldt, K., Gencarelli, C. N.,
Hedgecock, I. M., Langer, S., Magand, O., Mastromonaco, M. N., Nordstrøm,
C., Pfaffhuber, K. A., Pirrone, N., Ryjkov, A., Selin, N. E., Skov, H., Song,
S., Sprovieri, F., Steffen, A., Toyota, K., Travnikov, O., Yang, X., and
Dommergue, A.: Chemical cycling and deposition of atmospheric mercury in
polar regions: review of recent measurements and comparison with models,
Atmos. Chem. Phys., 16, 10735–10763,
https://doi.org/10.5194/acp-16-10735-2016, 2016a.
Angot, H., Magand, O., Helmig, D., Ricaud, P., Quennehen, B., Gallée, H.,
Del Guasta, M., Sprovieri, F., Pirrone, N., Savarino, J., and Dommergue, A.:
New insights into the atmospheric mercury cycling in central Antarctica and
implications on a continental scale, Atmos. Chem. Phys., 16, 8249–8264,
https://doi.org/10.5194/acp-16-8249-2016, 2016b.
Atwell, L., Hobson, K. A., and Welch, H. E.: Biomagnification and
bioaccumulation of mercury in an arctic marine food web: insights from stable
nitrogen isotope analysis, Can. J. Fish. Aquat. Sci., 55, 1114–1121,
https://doi.org/10.1139/f98-001, 1998.
Barker, A. J., Douglas, T. A., Jacobson, A. D., McClelland, J. W., Ilgen, A.
G., Khosh, M. S., Lehn, G. O., and Trainor, T. P.: Late season mobilization
of trace metals in two small Alaskan arctic watersheds as a proxy for
landscape scale permafrost active layer dynamics, Chem. Geol., 381, 180–193,
https://doi.org/10.1016/j.chemgeo.2014.05.012, 2014.
Bergin, M. H., Jaffrezo, J.-L., Davidson, C. I., Dibb, J. E., Pandis, S. N.,
Hillamo, R., Maenhaut, W., Kuhns, H. D., and Makela, T.: The contributions of
snow, fog, and dry deposition to the summer flux of anions and cations at
Summit, Greenland, J. Geophys. Res.-Atmos., 100, 16275–16288,
https://doi.org/10.1029/95JD01267, 1995.
Brooks, S., Lindberg, S., Southworth, G., and Arimoto, R.: Springtime
atmospheric mercury speciation in the McMurdo, Antarctica coastal region,
Atmos. Environ., 42, 2885–2893, https://doi.org/10.1016/j.atmosenv.2007.06.038, 2008.
Brooks, S. B., Saiz-Lopez, A., Skov, H., Lindberg, S. E., Plane, J. M. C.,
and Goodsite, M. E.: The mass balance of mercury in the springtime arctic
environment, Geophys. Res. Lett., 33, L13812, https://doi.org/10.1029/2005GL025525, 2006.
de Caritat, P., Hall, G., Gìslason, S., Belsey, W., Braun, M.,
Goloubeva, N. I., Olsen, H. K., Scheie, J. O., and Vaive, J. E.: Chemical
composition of arctic snow: concentration levels and regional distribution of
major elements, Sci. Total Environ., 336, 183–199,
https://doi.org/10.1016/j.scitotenv.2004.05.031, 2005.
Cherry, J. E., Déry, S. J., Cheng, Y., Stieglitz, M., Jacobs, A. S., and
Pan, F.: Climate and hydrometeorology of the Toolik Lake region and the
Kuparuk River basin, in: Alaska's changing arctic: ecological consequences
for tundra, streams, and lakes, edited by: Hobbie, J. E. and Kling, G. W.,
21–60, Oxford University Press, New York, 2014.
Cobbett, F. D., Steffen, A., Lawson, G., and van Heyst, B. J.: GEM fluxes and
atmospheric mercury concentrations (GEM, RGM and Hgp) in the Canadian Arctic
at Alert, Nunavut, Canada (February–June 2005), Atmos. Environ., 41,
6527–6543, https://doi.org/10.1016/j.atmosenv.2007.04.033, 2007.
Corbitt, E. S., Jacob, D. J., Holmes, C. D., Streets, D. G., and Sunderland,
E. M.: Global source-receptor relationships for mercury deposition under
present-day and 2050 emissions scenarios, Environ. Sci. Technol., 45,
10477–10484, https://doi.org/10.1021/es202496y, 2011.
Craig, H.: Isotopic variations in meteoric waters, Science, 133, 1702–1703,
https://doi.org/10.1126/science.133.3465.1702, 1961.
Dominé, F. and Shepson, P. B.: Air-snow interactions and atmospheric
chemistry, Science, 297, 1506–1510, https://doi.org/10.1126/science.1074610, 2002.
Dommergue, A., Ferrari, C. P., Poissant, L., Gauchard, P.-A., and Boutron, C.
F.: Diurnal cycles of gaseous mercury within the snowpack at
Kuujjuarapik/Whapmagoostui, Québec, Canada, Environ. Sci. Technol., 37,
3289–3297, https://doi.org/10.1021/es026242b, 2003.
Dommergue, A., Sprovieri, F., Pirrone, N., Ebinghaus, R., Brooks, S.,
Courteaud, J., and Ferrari, C. P.: Overview of mercury measurements in the
Antarctic troposphere, Atmos. Chem. Phys., 10, 3309–3319,
https://doi.org/10.5194/acp-10-3309-2010, 2010.
Douglas, T. A. and Sturm, M.: Arctic haze, mercury and the chemical
composition of snow across northwestern Alaska, Atmos. Environ., 38,
805–820, https://doi.org/10.1016/j.atmosenv.2003.10.042, 2004.
Douglas, T. A., Sturm, M., Simpson, W. R., Brooks, S., Lindberg, S. E., and
Perovich, D. K.: Elevated mercury measured in snow and frost flowers near
Arctic sea ice leads, Geophys. Res. Lett., 32, L04502,
https://doi.org/10.1029/2004GL022132, 2005.
Douglas, T. A., Sturm, M., Simpson, W. R., Blum, J. D., Alvarez-Aviles, L.,
Keeler, G. J., Perovich, D. K., Biswas, A., and Johnson, K.: Influence of
snow and ice crystal formation and accumulation on mercury deposition to the
Arctic, Environ. Sci. Technol., 42, 1542–1551, https://doi.org/10.1021/es070502d, 2008.
Douglas, T. A., Loseto, L. L., Macdonald, R. W., Outridge, P., Dommergue, A.,
Poulain, A., Amyot, M., Barkay, T., Berg, T., Chételat, J., Constant, P.,
Evans, M., Ferrari, C., Gantner, N., Johnson, M. S., Kirk, J., Kroer, N.,
Larose, C., Lean, D., Nielsen, T. G., Poissant, L., Rognerud, S., Skov, H.,
Sørensen, S., Wang, F., Wilson, S., and Zdanowicz, C. M.: The fate of
mercury in arctic terrestrial and aquatic ecosystems, a review, Environ.
Chem., 9, 321–355, https://doi.org/10.1071/EN11140, 2012.
Douglas, T. A., Sturm, M., Blum, J. D., Polashenski, C., Stuefer, S.,
Hiemstra, C., Steffen, A., Filhol, S., and Prevost, R.: A pulse of mercury
and major ions in snowmelt runoff from a small arctic Alaska watershed,
Environ. Sci. Technol., 51, 11145–11155, https://doi.org/10.1021/acs.est.7b03683, 2017.
Driscoll, C. T., Mason, R. P., Chan, H. M., Jacob, D. J., and Pirrone, N.:
Mercury as a global pollutant: sources, pathways, and effects, Environ. Sci.
Technol., 47, 4967–4983, https://doi.org/10.1021/es305071v, 2013.
Enrico, M., Le Roux, G., Heimbürger, L.-E., Van Beek, P., Souhaut, M.,
Chmeleff, J., and Sonke, J. E.: Holocene atmospheric mercury levels
reconstructed from peat bog mercury stable isotopes, Environ. Sci. Technol.,
51, 5899–5906, https://doi.org/10.1021/acs.est.6b05804, 2017.
Essery, R. and Pomeroy, J.: Vegetation and topographic control of wind-blown
snow distributions in distributed and aggregated simulations for an arctic
tundra basin, J. Hydrometeorol., 5, 735–744,
https://doi.org/10.1175/1525-7541(2004)005<0735:VATCOW>2.0.CO;2, 2004.
Essery, R., Li, L., and Pomeroy, J.: A distributed model of blowing snow over
complex terrain, Hydrol. Process., 13, 2423–2438,
https://doi.org/10.1002/(SICI)1099-1085(199910)13:14/15<2423::AID-HYP853>3.0.CO;2-U,
1999.
Faïn, X., Grangeon, S., Bahlmann, E., Fritsche, J., Obrist, D.,
Dommergue, A., Ferrari, C. P., Cairns, W., Ebinghaus, R., Barbante, C.,
Cescon, P., and Boutron, C.: Diurnal production of gaseous mercury in the
alpine snowpack before snowmelt, J. Geophys. Res., 112, D21311,
https://doi.org/10.1029/2007JD008520, 2007.
Faïn, X., Ferrari, C. P., Dommergue, A., Albert, M., Battle, M., Arnaud,
L., Barnola, J.-M., Cairns, W., Barbante, C., and Boutron, C.: Mercury in the
snow and firn at Summit Station, Central Greenland, and implications for the
study of past atmospheric mercury levels, Atmos. Chem. Phys., 8, 3441–3457,
https://doi.org/10.5194/acp-8-3441-2008, 2008.
Faïn, X., Obrist, D., Pierce, A., Barth, C., Gustin, M. S., and Boyle, D.
P.: Whole-watershed mercury balance at Sagehen Creek, Sierra Nevada, CA,
Geochim. Cosmochim. Acta, 75, 2379–2392, https://doi.org/10.1016/j.gca.2011.01.041,
2011.
Faïn, X., Helmig, D., Hueber, J., Obrist, D., and Williams, M. W.:
Mercury dynamics in the Rocky Mountain, Colorado, snowpack, Biogeosciences,
10, 3793–3807, https://doi.org/10.5194/bg-10-3793-2013, 2013.
Ferrari, C. P., Dommergue, A., Boutron, C. F., Jitaru, P., and Adams, F. C.:
Profiles of mercury in the snow pack at Station Nord, Greenland shortly after
polar sunrise, Geophys. Res. Lett., 31, L03401, https://doi.org/10.1029/2003GL018961,
2004.
Ferrari, C. P., Gauchard, P.-A., Aspmo, K., Dommergue, A., Magand, O.,
Bahlmann, E., Nagorski, S., Temme, C., Ebinghaus, R., Steffen, A., Banic, C.,
Berg, T., Planchon, F., Barbante, C., Cescon, P., and Boutron, C. F.:
Snow-to-air exchanges of mercury in an Arctic seasonal snow pack in
Ny-Ålesund, Svalbard, Atmos. Environ., 39, 7633–7645,
https://doi.org/10.1016/j.atmosenv.2005.06.058, 2005.
Ferrari, C. P., Padova, C., Faïn, X., Gauchard, P.-A., Dommergue, A.,
Aspmo, K., Berg, T., Cairns, W., Barbante, C., Cescon, P., Kaleschke, L.,
Richter, A., Wittrock, F., and Boutron, C.: Atmospheric mercury depletion
event study in Ny-Ålesund (Svalbard) in spring 2005, Deposition and
transformation of Hg in surface snow during springtime, Sci. Total Environ.,
397, 167–177, https://doi.org/10.1016/j.scitotenv.2008.01.064, 2008.
Fitzgerald, W. F., Engstrom, D. R., Lamborg, C. H., Tseng, C.-M., Balcom, P.
H., and Hammerschmidt, C. R.: Modern and historic atmospheric mercury fluxes
in Northern Alaska: global sources and arctic depletion, Environ. Sci.
Technol., 39, 557–568, https://doi.org/10.1021/es049128x, 2005.
Fitzgerald, W. F., Hammerschmidt, C. R., Engstrom, D. R., Balcom, P. H.,
Lamborg, C. H., and Tseng, C.-M.: Mercury in the Alaskan arctic, in Alaska's
changing arctic: ecological consequences for tundra, streams, and lakes,
edited by: Hobbie, J. E. and Kling, G. W., Oxford University Press, New York,
287–302, 2014.
Garbarino, J. R., Snyder-Conn, E., Leiker, T. J., and Hoffman, G. L.:
Contaminants in Arctic snow collected over Northwest Alaskan sea ice, Water.
Air. Soil Pollut., 139, 183–214, https://doi.org/10.1023/A:1015808008298, 2002.
Gat, J. R.: Isotope hydrology: a study of the water cycle, World Scientific,
London, 2010.
King, M. D. and Simpson, W. R.: Extinction of UV radiation in arctic snow at
Alert, Canada (82∘ N), J. Geophys. Res.-Atmos., 106, 12499–12507,
https://doi.org/10.1029/2001JD900006, 2001.
Kirk, J. L., St. Louis, V. L., and Sharp, M. J.: Rapid reduction and
reemission of mercury deposited into snowpacks during atmospheric mercury
depletion events at Churchill, Manitoba, Canada, Environ. Sci. Technol., 40,
7590–7596, https://doi.org/10.1021/es061299+, 2006.
Krnavek, L., Simpson, W. R., Carlson, D., Domine, F., Douglas, T. A., and
Sturm, M.: The chemical composition of surface snow in the Arctic: Examining
marine, terrestrial, and atmospheric influences, Atmos. Environ., 50,
349–359, https://doi.org/10.1016/j.atmosenv.2011.11.033, 2012.
Lalonde, J. D., Poulain, A. J., and Amyot, M.: The role of mercury redox
reactions in snow on snow-to-air mercury transfer, Environ. Sci. Technol.,
36, 174–178, https://doi.org/10.1021/es010786g, 2002.
Landers, D. H., Ford, J., Gubala, C., Monetti, M., Lasorsa, B. K., and
Martinson, J.: Mercury in vegetation and lake sediments from the U.S. Arctic,
Water Air. Soil Pollut., 80, 591–601, https://doi.org/10.1007/BF01189711, 1995.
Lindberg, S. E., Hanson, P. J., Meyers, T. P., and Kim, K.-H.: Air/surface
exchange of mercury vapor over forests – the need for a reassessment of
continental biogenic emissions, Atmos. Environ., 32, 895–908,
https://doi.org/10.1016/S1352-2310(97)00173-8, 1998.
Liptzin, D., Williams, M. W., Helmig, D., Seok, B., Filippa, G., Chowanski,
K., and Hueber, J.: Process-level controls on CO2 fluxes from a seasonally
snow-covered subalpine meadow soil, Niwot Ridge, Colorado, Biogeochemistry,
95, 151–166, https://doi.org/10.1007/s10533-009-9303-2, 2009.
Mann, E., Meyer, T., Mitchell, C. P. J., and Wania, F.: Mercury fate in
ageing and melting snow: development and testing of a controlled laboratory
system, J. Environ. Monit., 13, 2695–2702, https://doi.org/10.1039/C1EM10297D, 2011.
Mann, E., Ziegler, S., Mallory, M., and O'Driscoll, N.: Mercury
photochemistry in snow and implications for arctic ecosystems, Environ. Rev.,
22, 331–345, https://doi.org/10.1139/er-2014-0006, 2014.
Mann, E. A., Mallory, M. L., Ziegler, S. E., Tordon, R., and O'Driscoll, N.
J.: Mercury in Arctic snow: quantifying the kinetics of photochemical
oxidation and reduction, Sci. Total Environ., 509–510, 115–132,
https://doi.org/10.1016/j.scitotenv.2014.07.056, 2015.
Monson, R. K., Burns, S. P., Williams, M. W., Delany, A. C., Weintraub, M.,
and Lipson, D. A.: The contribution of beneath-snow soil respiration to total
ecosystem respiration in a high-elevation, subalpine forest, Global
Biogeochem. Cy., 20, GB3030, https://doi.org/10.1029/2005GB002684, 2006.
Moore, C. W., Obrist, D., Steffen, A., Staebler, R. M., Douglas, T. A.,
Richter, A., and Nghiem, S. V.: Convective forcing of mercury and ozone in
the Arctic boundary layer induced by leads in sea ice, Nature, 506, 81–84,
https://doi.org/10.1038/nature12924, 2014.
National Atmospheric Deposition Program: NRSP-3, NADP Program Office,
Illinois State Water Survey, University of Illinois, Champaign, IL 61820.,
2017.
Nerentorp Mastromonaco, M., Gårdfeldt, K., Jourdain, B., Abrahamsson, K.,
Granfors, A., Ahnoff, M., Dommergue, A., Méjean, G., and Jacobi, H.-W.:
Antarctic winter mercury and ozone depletion events over sea ice, Atmos.
Environ., 129, 125–132, https://doi.org/10.1016/j.atmosenv.2016.01.023, 2016.
Norman, A. L., Barrie, L. A., Toom-Sauntry, D., Sirois, A., Krouse, H. R.,
Li, S. M., and Sharma, S.: Sources of aerosol sulphate at Alert:
apportionment using stable isotopes, J. Geophys. Res.-Atmos., 104,
11619–11631, https://doi.org/10.1029/1999JD900078, 1999.
Obrist, D., Tas, E., Peleg, M., Matveev, V., Faïn, X., Asaf, D., and
Luria, M.: Bromine-induced oxidation of mercury in the mid-latitude
atmosphere, Nat. Geosci., 4, 22–26, https://doi.org/10.1038/ngeo1018, 2011.
Obrist, D., Pokharel, A. K., and Moore, C.: Vertical profile measurements of
soil air suggest immobilization of gaseous elemental mercury in mineral soil,
Environ. Sci. Technol., 48, 2242–2252, https://doi.org/10.1021/es4048297, 2014.
Obrist, D., Agnan, Y., Jiskra, M., Olson, C. L., Colegrove, D. P., Hueber,
J., Moore, C. W., Sonke, J. E., and Helmig, D.: Tundra uptake of atmospheric
elemental mercury drives Arctic mercury pollution, Nature, 547, 201–204,
https://doi.org/10.1038/nature22997, 2017.
Oechel, W. C., Vourlitis, G., and Hastings, S. J.: Cold season CO2
emission from arctic soils, Global Biogeochem. Cy., 11, 163–172,
https://doi.org/10.1029/96GB03035, 1997.
Pearson, C., Schumer, R., Trustman, B. D., Rittger, K., Johnson, D. W., and
Obrist, D.: Nutrient and mercury deposition and storage in an alpine snowpack
of the Sierra Nevada, USA, Biogeosciences, 12, 3665–3680,
https://doi.org/10.5194/bg-12-3665-2015, 2015.
Poulain, A. J., Lalonde, J. D., Amyot, M., Shead, J. A., Raofie, F., and
Ariya, P. A.: Redox transformations of mercury in an Arctic snowpack at
springtime, Atmos. Environ., 38, 6763–6774,
https://doi.org/10.1016/j.atmosenv.2004.09.013, 2004.
Schroeder, W. H. and Munthe, J.: Atmospheric mercury – An overview, Atmos.
Environ., 32, 809–822, https://doi.org/10.1016/S1352-2310(97)00293-8, 1998.
Schroeder, W. H., Anlauf, K. G., Barrie, L. A., Lu, J. Y., Steffen, A.,
Schneeberger, D. R., and Berg, T.: Arctic springtime depletion of mercury,
Nature, 394, 331–332, https://doi.org/10.1038/28530, 1998.
Selin, N. E.: Global biogeochemical cycling of mercury: a review, Annu. Rev.
Environ. Resour., 34, 43–63, https://doi.org/10.1146/annurev.environ.051308.084314,
2009.
Seok, B., Helmig, D., Williams, M. W., Liptzin, D., Chowanski, K., and
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,
https://doi.org/10.1007/s10533-009-9302-3, 2009.
Shaver, G. R. and Chapin, F. S.: Production: biomass relationships and
element cycling in contrasting arctic vegetation types, Ecol. Monogr., 61,
1–31, https://doi.org/10.2307/1942997, 1991.
Siegenthaler, U. and Oeschger, H.: Correlation of 18O in
precipitation with temperature and altitude, Nature, 285, 314–317,
https://doi.org/10.1038/285314a0, 1980.
Simpson, W. R., von Glasow, R., Riedel, K., Anderson, P., Ariya, P.,
Bottenheim, J., Burrows, J., Carpenter, L. J., Frieß, U., Goodsite, M.
E., Heard, D., Hutterli, M., Jacobi, H.-W., Kaleschke, L., Neff, B., Plane,
J., Platt, U., Richter, A., Roscoe, H., Sander, R., Shepson, P., Sodeau, J.,
Steffen, A., Wagner, T., and Wolff, E.: Halogens and their role in polar
boundary-layer ozone depletion, Atmos. Chem. Phys., 7, 4375–4418,
https://doi.org/10.5194/acp-7-4375-2007, 2007.
Snyder-Conn, E., Garbarino, J. R., Hoffman, G. L., and Oelkers, A.: Soluble
trace elements and total mercury in arctic alaskan snow, Arctic, 50,
201–215, 1997.
Sprovieri, F., Pirrone, N., Ebinghaus, R., Kock, H., and Dommergue, A.: A
review of worldwide atmospheric mercury measurements, Atmos. Chem. Phys., 10,
8245–8265, https://doi.org/10.5194/acp-10-8245-2010, 2010.
St. Louis, V. L., Sharp, M. J., Steffen, A., May, A., Barker, J., Kirk, J.
L., Kelly, D. J. A., Arnott, S. E., Keatley, B., and Smol, J. P.: Some
sources and sinks of monomethyl and inorganic mercury on Ellesmere Island in
the Canadian high Arctic, Environ. Sci. Technol., 39, 2686–2701,
https://doi.org/10.1021/es049326o, 2005.
Steffen, A., Schroeder, W., Bottenheim, J., Narayan, J., and Fuentes, J. D.:
Atmospheric mercury concentrations: measurements and profiles near snow and
ice surfaces in the Canadian Arctic during Alert 2000, Atmos. Environ., 36,
2653–2661, https://doi.org/10.1016/S1352-2310(02)00112-7, 2002.
Steffen, A., Douglas, T., Amyot, M., Ariya, P., Aspmo, K., Berg, T.,
Bottenheim, J., Brooks, S., Cobbett, F., Dastoor, A., Dommergue, A.,
Ebinghaus, R., Ferrari, C., Gardfeldt, K., Goodsite, M. E., Lean, D.,
Poulain, A. J., Scherz, C., Skov, H., Sommar, J., and Temme, C.: A synthesis
of atmospheric mercury depletion event chemistry in the atmosphere and snow,
Atmos. Chem. Phys., 8, 1445–1482, https://doi.org/10.5194/acp-8-1445-2008, 2008.
Steffen, A., Bottenheim, J., Cole, A., Douglas, T. A., Ebinghaus, R., Friess,
U., Netcheva, S., Nghiem, S., Sihler, H., and Staebler, R.: Atmospheric
mercury over sea ice during the OASIS-2009 campaign, Atmos. Chem. Phys., 13,
7007–7021, https://doi.org/10.5194/acp-13-7007-2013, 2013.
Steffen, A., Bottenheim, J., Cole, A., Ebinghaus, R., Lawson, G., and
Leaitch, W. R.: Atmospheric mercury speciation and mercury in snow over time
at Alert, Canada, Atmos. Chem. Phys., 14, 2219–2231,
https://doi.org/10.5194/acp-14-2219-2014, 2014.
Sturm, M. and Liston, G. E.: The snow cover on lakes of the Arctic Coastal
Plain of Alaska, USA, J. Glaciol., 49, 370–380,
https://doi.org/10.3189/172756503781830539, 2003.
Toom-Sauntry, D. and Barrie, L. A.: Chemical composition of snowfall in the
high Arctic: 1990–1994, Atmos. Environ., 36, 2683–2693,
https://doi.org/10.1016/S1352-2310(02)00115-2, 2002.
Uematsu, M., Kinoshita, K., and Nojiri, Y.: Scavenging of insoluble particles
from the marine atmosphere over the sub-arctic north Pacific, J. Atmos.
Chem., 35, 151–163, https://doi.org/10.1023/A:1006219028497, 2000.
US EPA: Method 1631: Mercury in water by oxidation, purge and trap, and cold
vapor atomic fluorescence spectrometry, United States Environmental
Protection Agency, 2002.
Van Dam, B., Helmig, D., Burkhart, J. F., Obrist, D., and Oltmans, S. J.:
Springtime boundary layer O3 and GEM depletion at Toolik Lake, Alaska, J.
Geophys. Res.-Atmos., 118, 3382–3391, https://doi.org/10.1002/jgrd.50213, 2013.
Short summary
In this study, we investigated mercury dynamics in an interior arctic tundra at Toolik Field Station (200 km from the Arctic Ocean) during two full snow seasons. We continuously measured atmospheric, snow gas phase, and soil pores mercury concentrations. We observed consistent concentration declines from the atmosphere to snowpack to soils, indicating that soils are continuous sinks of mercury. We suggest that interior arctic snowpacks may be negligible sources of mercury.
In this study, we investigated mercury dynamics in an interior arctic tundra at Toolik Field...