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Mercury Dynamics in the Rocky Mountain, Colorado, Snowpack : Volume 9, Issue 11 (02/11/2012)

By Faïn, X.

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Book Id: WPLBN0003987804
Format Type: PDF Article :
File Size: Pages 36
Reproduction Date: 2015

Title: Mercury Dynamics in the Rocky Mountain, Colorado, Snowpack : Volume 9, Issue 11 (02/11/2012)  
Author: Faïn, X.
Volume: Vol. 9, Issue 11
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Obrist, D., Hueber, J., Helmig, D., Williams, M. M., & Faïn, X. (2012). Mercury Dynamics in the Rocky Mountain, Colorado, Snowpack : Volume 9, Issue 11 (02/11/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: UJF – Grenoble 1/CNRS, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE) UMR5183, Grenoble, 38041, France. Gaseous Elemental Mercury (GEM) was monitored at the Niwot Ridge (NWT) long-term ecological research (LTER) site (Colorado, USA, 40° N) from interstitial air extracted from the snowpack at depths ranging from the snow surface to 10 cm above the soil. A highly dynamic cycling of mercury (Hg) in this mid-latitude snowpack was observed. Patterns were driven by both GEM production in surface snow and GEM destruction in the deeper snowpack layers. Thorough mixing and vertical transport processes were observed through the snowpack. GEM was photochemically produced near the snow-air interface leading to enhanced GEM levels in interstitial air of surface snow of up to 8 ng m−3. During low wind periods, GEM in surface snow layers remained significantly above ambient air levels at night as well, which may indicate a potential weak GEM production over night. Analysis of vertical GEM gradients in the snowpack show that surface GEM enhancements efficiently propagated down the snowpack, with a temporal lag in peak GEM levels observed with increasing depth. Downward diffusion was responsible for much of these patterns, although vertical advection also contributed to vertical redistribution. Destruction of GEM in the lower snowpack layers was attributed to dark oxidation of GEM. Analysis of vertical GEM/CO2 flux ratios indicated that this GEM destruction occurred in the snow and not in the underlying soil. The strong, diurnal patterns of photochemical GEM production at the surface ultimately lead to re-emission losses of deposited Hg back to the atmosphere. The NWT data show that highest of GEM production and emission occur shortly after fresh snowfall, indicating that fresh snow possibly resupplies photoreducible Hg to the snowpack.

Summary
Mercury dynamics in the Rocky Mountain, Colorado, Snowpack

Excerpt
Dominé, F. and Shepson, P. B.: Air-Snow Interactions and Atmospheric Chemistry, Science, 297, 1506–1510, 2002.; Bartels-Rausch, T., Huthwelker, T., Jori, M., Gaggler, H. W., and Ammann, M.: Interaction of gaseous elemental mercury with snow surfaces: laboratory investigation, Environ. Res. Lett., 3, 045009, doi:10.1088/1748-9326/3/4/045009, 2008.; Caine, N.: Snowpack influences on geomorphic processes in Green Lakes Valley, Colorado Front Range, Geog. J., 161, 55–68, 1995.; Bartels-Rausch, T., Krysztofiak, G., Bernhard, A., Schlaeppi, M., Schwikowski, M., and Ammann, M.: Photoinduced reduction of divalent mercury in ice by organic matter, Chemosphere, 82, 199–203, doi:10.1016/j.chemosphere.2010.10.020, 2011.; Bocquet F., Helmig D., and Oltmans S.J.: Ozone in interstitial air of the mid-latitude, seasonal snowpack at Niwot Ridge, Colorado, Arctic, Antarctic and Alpine Research, 39, 375–387, 2007.; Dommergue, A., Ferrari, C. P., Gauchard, P.-A., Boutron, C. F., Poissant, L., Pilote, M., Adams, F., and Jitaru, P.: The fate of mercury species in a sub-arctic snowpack during snowmelt, Geophys. Res. Lett., 30, 1621, doi:10.1029/2003GL017308, 2003a.; 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, 2003b.; Dommergue, A., Balhmann, E., Ebinghaus, R., Ferrari, C., and Boutron, C.: Laboratory simulation of Hg° emissions from a snowpack, Anal. Bioanal. Chem., 288, 319–327, doi:10.1007/s00216-007-1186-2, 2007.; Dommergue, A., Barret, M., Courteaud, J., Cristofanelli, P., Ferrari, C. P., and Gallée, H.: Dynamic recycling of gaseous elemental mercury in the boundary layer of the Antarctic Plateau, Atmos. Chem. Phys. Discuss., 12, 18133–18161, doi:10.5194/acpd-12-18133-2012, 2012.; Douglas, T. A., Loseto, L. L., Macdonald, R. W., Outridge, P. M., 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. L., Kroer, N., Larose, C., Lean, D., Nielsen, T. G., Poissant, L., Rognerud, S., Skov, H., Sørensen, S., Wang, F., and Wilson, S.: The fate of mercury in Arctic terrestrial and aquatic ecosystems, a review, Environ. Chem., 321, doi:org/10.1071/EN11140, 2012.; Schroeder, W. H. and Munthe, J.: Atmospheric mercury – An overview, Atmos. Environ., 32, 809–822, 1998.; Durnford, D. and Dastoor, A.: The behavior of mercury in the cryosphere: A review of what we know from observations, J. Geophys. Res., 116, D06305, doi:10.1029/2010jd014809, 2011.; Ebinghaus, R., Jennings, S. G., Schroeder, W. H., Berg, T., Donaghy, T., Guentzel, J., Kenny, C., Kock, H. H., Kvietkus, K., Landing, W., Muhleck, T., Munthe, J., Prestbo, E. M., Schneeberger, D., Slemr, F., Sommar, J., Urba, A., Wallschlager, D., and Xiao, Z.: International field intercomparison measurements of atmospheric mercury species at Mace Head, Ireland, Atmos. Environ., 33, 3063–3073, 1999.; Ericksen, J. A., Gustin, M. S., Lindberg, S. E., Olund, S. D., and Krabbenhoft, D. P.: Assessing the potential for re-emission of mercury deposited in precipitation from arid soils using a stable isotope, Environ. Sci. Technol., 39, 8001–8007, 2005.; Erickson, T. A.: Development and application of geostatistical methods to modeling spatial variation in snowpack properties, Front Range, Colorado, University of Colorado at Boulder, 190 pp., 2004.; Faïn, X., Grangeon, S., Balhmann, E., Fritsche, J., Obrist, D., Dommergue, A., Ferrari, C., Cairns, W.

 

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