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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2017
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Online Access: | https://eprints.utas.edu.au/25995/ https://eprints.utas.edu.au/25995/2/Tison_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2017JC013288 |
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ftunivtasmania:oai:eprints.utas.edu.au:25995 2023-05-15T13:31:52+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 Bloomster, LJ Heindrickx, S Uhlig, C Luhtanen, A-M de Jong, J Janssens, J Carnat, G Zhou, J Delille, B 2017 application/pdf https://eprints.utas.edu.au/25995/ https://eprints.utas.edu.au/25995/2/Tison_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2017JC013288 en eng Wiley-Blackwell Publishing Inc. https://eprints.utas.edu.au/25995/2/Tison_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf Tison, J-L, Schwegmann, S, Dieckmann, G, Rintala, J-M, Meyer, H, Moreau, S orcid:0000-0001-9446-812X , Vancoppenolle, M, Nomura, D, Engberg, S, Bloomster, LJ, Heindrickx, S, Uhlig, C, Luhtanen, A-M, de Jong, J, Janssens, J, Carnat, G, Zhou, J and Delille, B 2017 , 'Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack' , Journal of Geophysical Research: Oceans, vol. 122, no. 12 , pp. 9548-9571 , doi:10.1002/2017JC013288 <http://dx.doi.org/10.1002/2017JC013288>. sea ice biogeochemistry snow cover winter Weddell Sea Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1002/2017JC013288 2021-09-13T22:17:08Z 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, July-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 southwards 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 counter-intuitively, to warm the ice. Article in Journal/Newspaper Antarc* Antarctic ice pack Sea ice Southern Ocean Weddell Sea University of Tasmania: UTas ePrints Antarctic Southern Ocean Weddell Weddell Sea Journal of Geophysical Research: Oceans 122 12 9548 9571 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
sea ice biogeochemistry snow cover winter Weddell Sea |
spellingShingle |
sea ice biogeochemistry snow cover winter Weddell Sea Tison, J-L Schwegmann, S Dieckmann, G Rintala, J-M Meyer, H Moreau, S Vancoppenolle, M Nomura, D Engberg, S Bloomster, LJ Heindrickx, 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 |
topic_facet |
sea ice biogeochemistry snow cover winter Weddell Sea |
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, July-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 southwards 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 counter-intuitively, 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 Bloomster, LJ Heindrickx, S Uhlig, C Luhtanen, A-M de Jong, J Janssens, J Carnat, G Zhou, J Delille, B |
author_facet |
Tison, J-L Schwegmann, S Dieckmann, G Rintala, J-M Meyer, H Moreau, S Vancoppenolle, M Nomura, D Engberg, S Bloomster, LJ Heindrickx, 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 |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/25995/ https://eprints.utas.edu.au/25995/2/Tison_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2017JC013288 |
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_relation |
https://eprints.utas.edu.au/25995/2/Tison_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf Tison, J-L, Schwegmann, S, Dieckmann, G, Rintala, J-M, Meyer, H, Moreau, S orcid:0000-0001-9446-812X , Vancoppenolle, M, Nomura, D, Engberg, S, Bloomster, LJ, Heindrickx, S, Uhlig, C, Luhtanen, A-M, de Jong, J, Janssens, J, Carnat, G, Zhou, J and Delille, B 2017 , 'Biogeochemical impact of snow cover and cyclonic intrusions on the winter Weddell Sea ice pack' , Journal of Geophysical Research: Oceans, vol. 122, no. 12 , pp. 9548-9571 , doi:10.1002/2017JC013288 <http://dx.doi.org/10.1002/2017JC013288>. |
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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1766021763156672512 |