Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results
Sun-lit snow is increasingly recognized as a chemical reactor that plays an active role in uptake, transformation, and release of atmospheric trace gases. Snow is known to influence boundary layer air on a local scale, and given the large global surface coverage of snow may also be significant on re...
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:20436 2023-05-15T15:12:59+02:00 Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results Thomas, JL Stutz, J Huey, LG Toyota, K Dibb, JE von Glasow, R 2010 https://ueaeprints.uea.ac.uk/id/eprint/20436/ https://doi.org/10.5194/acpd-10-30927-2010 unknown Thomas, JL, Stutz, J, Huey, LG, Toyota, K, Dibb, JE and von Glasow, R (2010) Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results. Atmospheric Chemistry and Physics Discussions, 10 (12). pp. 30927-30970. ISSN 1680-7375 doi:10.5194/acpd-10-30927-2010 Article PeerReviewed 2010 ftuniveastangl https://doi.org/10.5194/acpd-10-30927-2010 2023-01-30T21:24:54Z Sun-lit snow is increasingly recognized as a chemical reactor that plays an active role in uptake, transformation, and release of atmospheric trace gases. Snow is known to influence boundary layer air on a local scale, and given the large global surface coverage of snow may also be significant on regional and global scales. We present a new detailed one-dimensional snow chemistry module that has been coupled to the 1-D atmospheric boundary layer model MISTRA, we refer to the coupled model as MISTRA-SNOW. The new 1-D snow module, which is dynamically coupled to the overlaying atmospheric model, includes heat transport in the snowpack, molecular diffusion, and wind pumping of gases in the interstitial air. The model includes gas phase photochemistry and chemical reactions both in the interstitial air and the atmosphere. Heterogeneous and multiphase chemistry on atmospheric aerosol is considered explicitly. The chemical interaction of interstitial air with snow grains is simulated assuming chemistry in a liquid (aqueous) layer on the grain surface. The model was used to investigate snow as the source of nitrogen oxides (NO x) and gas phase reactive bromine in the atmospheric boundary layer in the remote snow covered Arctic (over the Greenland ice sheet) as well as to investigate the link between halogen cycling and ozone depletion that has been observed in interstitial air. The model is validated using data taken 10 June-13 June, 2008 as part of the Greenland Summit Halogen-HOx experiment (GSHOX). The model predicts that reactions involving bromide and nitrate impurities in the surface snow at Summit can sustain atmospheric NO and BrO mixing ratios measured at Summit during this period. Article in Journal/Newspaper Arctic Greenland Ice Sheet University of East Anglia: UEA Digital Repository Arctic Greenland |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
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description |
Sun-lit snow is increasingly recognized as a chemical reactor that plays an active role in uptake, transformation, and release of atmospheric trace gases. Snow is known to influence boundary layer air on a local scale, and given the large global surface coverage of snow may also be significant on regional and global scales. We present a new detailed one-dimensional snow chemistry module that has been coupled to the 1-D atmospheric boundary layer model MISTRA, we refer to the coupled model as MISTRA-SNOW. The new 1-D snow module, which is dynamically coupled to the overlaying atmospheric model, includes heat transport in the snowpack, molecular diffusion, and wind pumping of gases in the interstitial air. The model includes gas phase photochemistry and chemical reactions both in the interstitial air and the atmosphere. Heterogeneous and multiphase chemistry on atmospheric aerosol is considered explicitly. The chemical interaction of interstitial air with snow grains is simulated assuming chemistry in a liquid (aqueous) layer on the grain surface. The model was used to investigate snow as the source of nitrogen oxides (NO x) and gas phase reactive bromine in the atmospheric boundary layer in the remote snow covered Arctic (over the Greenland ice sheet) as well as to investigate the link between halogen cycling and ozone depletion that has been observed in interstitial air. The model is validated using data taken 10 June-13 June, 2008 as part of the Greenland Summit Halogen-HOx experiment (GSHOX). The model predicts that reactions involving bromide and nitrate impurities in the surface snow at Summit can sustain atmospheric NO and BrO mixing ratios measured at Summit during this period. |
format |
Article in Journal/Newspaper |
author |
Thomas, JL Stutz, J Huey, LG Toyota, K Dibb, JE von Glasow, R |
spellingShingle |
Thomas, JL Stutz, J Huey, LG Toyota, K Dibb, JE von Glasow, R Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results |
author_facet |
Thomas, JL Stutz, J Huey, LG Toyota, K Dibb, JE von Glasow, R |
author_sort |
Thomas, JL |
title |
Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results |
title_short |
Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results |
title_full |
Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results |
title_fullStr |
Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results |
title_full_unstemmed |
Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results |
title_sort |
modeling chemistry in and above snow at summit, greenland - part 1: model description and results |
publishDate |
2010 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/20436/ https://doi.org/10.5194/acpd-10-30927-2010 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet |
genre_facet |
Arctic Greenland Ice Sheet |
op_relation |
Thomas, JL, Stutz, J, Huey, LG, Toyota, K, Dibb, JE and von Glasow, R (2010) Modeling chemistry in and above snow at Summit, Greenland - Part 1: Model description and results. Atmospheric Chemistry and Physics Discussions, 10 (12). pp. 30927-30970. ISSN 1680-7375 doi:10.5194/acpd-10-30927-2010 |
op_doi |
https://doi.org/10.5194/acpd-10-30927-2010 |
_version_ |
1766343595631050752 |