Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack
Sea ice is a dynamic biogeochemical reactor and a double interface actively interacting with both the atmosphere and the ocean. However, proper understanding of its annual impact on exchanges, and therefore potentially on the climate, notably suffer from the paucity of autumnal and winter data sets....
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://www.vliz.be/imisdocs/publications/313376.pdf |
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ftvliz:oai:oma.vliz.be:295541 2023-05-15T13:54:11+02:00 Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack Tison, J.-L. Schwegmann, S. Dieckmann, G. Rintala, J.-M. Meyer, H. Moreau, S. Vancoppenolle, M. Nomura, D. Engberg, S. Blomster, L.J. Hendrickx, S. Uhlig, C. Luhtanen, A.-M. de Jong, J. Janssens, J. Carnat, G. Zhou, J. Delille, B. 2017 application/pdf https://www.vliz.be/imisdocs/publications/313376.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000422732100014 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2017JC013288 https://www.vliz.be/imisdocs/publications/313376.pdf info:eu-repo/semantics/openAccess %3Ci%3EJGR%3A+Oceans+122%2812%29%3C%2Fi%3E%3A+9548-9571.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2F2017JC013288%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2F2017JC013288%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftvliz https://doi.org/10.1002/2017JC013288 2022-05-01T10:59:44Z Sea ice is a dynamic biogeochemical reactor and a double interface actively interacting with both the atmosphere and the ocean. However, proper understanding of its annual impact on exchanges, and therefore potentially on the climate, notably suffer from the paucity of autumnal and winter data sets. Here we present the results of physical and biogeochemical investigations on winter Antarctic pack ice in the Weddell Sea (R. V. Polarstern AWECS cruise, June-August 2013) which are compared with those from two similar studies conducted in the area in 1986 and 1992. The winter 2013 was characterized by a warm sea ice cover due to the combined effects of deep snow and frequent warm cyclones events penetrating southward from the open Southern Ocean. These conditions were favorable to high ice permeability and cyclic events of brine movements within the sea ice cover (brine tubes), favoring relatively high chlorophyll-a (Chl-a) concentrations. We discuss the timing of this algal activity showing that arguments can be presented in favor of continued activity during the winter due to the specific physical conditions. Large-scale sea ice model simulations also suggest a context of increasingly deep snow, warm ice, and large brine fractions across the three observational years, despite the fact that the model is forced with a snowfall climatology. This lends support to the claim that more severe Antarctic sea ice conditions, characterized by a longer ice season, thicker, and more concentrated ice are sufficient to increase the snow depth and, somehow counterintuitively, to warm the ice. Article in Journal/Newspaper Antarc* Antarctic ice pack Sea ice Southern Ocean Weddell Sea Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic Southern Ocean Weddell Weddell Sea Journal of Geophysical Research: Oceans 122 12 9548 9571 |
institution |
Open Polar |
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Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
Sea ice is a dynamic biogeochemical reactor and a double interface actively interacting with both the atmosphere and the ocean. However, proper understanding of its annual impact on exchanges, and therefore potentially on the climate, notably suffer from the paucity of autumnal and winter data sets. Here we present the results of physical and biogeochemical investigations on winter Antarctic pack ice in the Weddell Sea (R. V. Polarstern AWECS cruise, June-August 2013) which are compared with those from two similar studies conducted in the area in 1986 and 1992. The winter 2013 was characterized by a warm sea ice cover due to the combined effects of deep snow and frequent warm cyclones events penetrating southward from the open Southern Ocean. These conditions were favorable to high ice permeability and cyclic events of brine movements within the sea ice cover (brine tubes), favoring relatively high chlorophyll-a (Chl-a) concentrations. We discuss the timing of this algal activity showing that arguments can be presented in favor of continued activity during the winter due to the specific physical conditions. Large-scale sea ice model simulations also suggest a context of increasingly deep snow, warm ice, and large brine fractions across the three observational years, despite the fact that the model is forced with a snowfall climatology. This lends support to the claim that more severe Antarctic sea ice conditions, characterized by a longer ice season, thicker, and more concentrated ice are sufficient to increase the snow depth and, somehow counterintuitively, to warm the ice. |
format |
Article in Journal/Newspaper |
author |
Tison, J.-L. Schwegmann, S. Dieckmann, G. Rintala, J.-M. Meyer, H. Moreau, S. Vancoppenolle, M. Nomura, D. Engberg, S. Blomster, L.J. Hendrickx, S. Uhlig, C. Luhtanen, A.-M. de Jong, J. Janssens, J. Carnat, G. Zhou, J. Delille, B. |
spellingShingle |
Tison, J.-L. Schwegmann, S. Dieckmann, G. Rintala, J.-M. Meyer, H. Moreau, S. Vancoppenolle, M. Nomura, D. Engberg, S. Blomster, L.J. Hendrickx, S. Uhlig, C. Luhtanen, A.-M. de Jong, J. Janssens, J. Carnat, G. Zhou, J. Delille, B. Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack |
author_facet |
Tison, J.-L. Schwegmann, S. Dieckmann, G. Rintala, J.-M. Meyer, H. Moreau, S. Vancoppenolle, M. Nomura, D. Engberg, S. Blomster, L.J. Hendrickx, S. Uhlig, C. Luhtanen, A.-M. de Jong, J. Janssens, J. Carnat, G. Zhou, J. Delille, B. |
author_sort |
Tison, J.-L. |
title |
Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack |
title_short |
Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack |
title_full |
Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack |
title_fullStr |
Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack |
title_full_unstemmed |
Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack |
title_sort |
biogeochemical impact of snow cover and cyclonic intrusions on the winter weddell sea ice pack |
publishDate |
2017 |
url |
https://www.vliz.be/imisdocs/publications/313376.pdf |
geographic |
Antarctic Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic ice pack Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic ice pack Sea ice Southern Ocean Weddell Sea |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000422732100014 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2017JC013288 https://www.vliz.be/imisdocs/publications/313376.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2017JC013288 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
12 |
container_start_page |
9548 |
op_container_end_page |
9571 |
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1766259865638928384 |