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....
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/267079 2023-05-15T13:51:43+02:00 Biogeochemical Impact of Snow Cover and Cyclonic Intrusions on the Winter Weddell Sea Ice Pack Tison, Jean-Louis Blomster, L.J. Hendrickx, S. Uhlig, Christiane Luhtanen, Anne Mari De Jong, Jeroen Janssens, Julie Carnat, Gauthier Zhou, Jiayun Delille, Bruno Schwegmann, Sandra Dieckmann, Gerhard Rintala, Janne Markus Meyer, Hanno Moreau, Sébastien Vancoppenolle, Martin Nomura, Daïki Engberg, S. 2017-12 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/267079 en eng uri/info:doi/10.1002/2017JC013288 uri/info:scp/85040700450 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/267079 Journal of geophysical research. Oceans, 122 (12 Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Antarctica biogeochemistry sea ice Weddell Sea winter info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2017 ftunivbruxelles 2022-06-12T21:42:06Z 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. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Antarctica ice pack Sea ice Southern Ocean Weddell Sea DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic Southern Ocean Weddell Weddell Sea |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Antarctica biogeochemistry sea ice Weddell Sea winter |
spellingShingle |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Antarctica biogeochemistry sea ice Weddell Sea winter Tison, Jean-Louis Blomster, L.J. Hendrickx, S. Uhlig, Christiane Luhtanen, Anne Mari De Jong, Jeroen Janssens, Julie Carnat, Gauthier Zhou, Jiayun Delille, Bruno Schwegmann, Sandra Dieckmann, Gerhard Rintala, Janne Markus Meyer, Hanno Moreau, Sébastien Vancoppenolle, Martin Nomura, Daïki Engberg, S. Biogeochemical Impact of Snow Cover and Cyclonic Intrusions on the Winter Weddell Sea Ice Pack |
topic_facet |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos Antarctica biogeochemistry sea ice Weddell Sea winter |
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. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Tison, Jean-Louis Blomster, L.J. Hendrickx, S. Uhlig, Christiane Luhtanen, Anne Mari De Jong, Jeroen Janssens, Julie Carnat, Gauthier Zhou, Jiayun Delille, Bruno Schwegmann, Sandra Dieckmann, Gerhard Rintala, Janne Markus Meyer, Hanno Moreau, Sébastien Vancoppenolle, Martin Nomura, Daïki Engberg, S. |
author_facet |
Tison, Jean-Louis Blomster, L.J. Hendrickx, S. Uhlig, Christiane Luhtanen, Anne Mari De Jong, Jeroen Janssens, Julie Carnat, Gauthier Zhou, Jiayun Delille, Bruno Schwegmann, Sandra Dieckmann, Gerhard Rintala, Janne Markus Meyer, Hanno Moreau, Sébastien Vancoppenolle, Martin Nomura, Daïki Engberg, S. |
author_sort |
Tison, Jean-Louis |
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 |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/267079 |
geographic |
Antarctic Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica ice pack Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica ice pack Sea ice Southern Ocean Weddell Sea |
op_source |
Journal of geophysical research. Oceans, 122 (12 |
op_relation |
uri/info:doi/10.1002/2017JC013288 uri/info:scp/85040700450 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/267079 |
_version_ |
1766255746541944832 |