On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products
Open ocean deep convection is a common source of error in the representation of Antarctic Bottom Water (AABW) formation in ocean general circulation models. Although those events are well described in non-assimilatory ocean simulations, the recent appearance of a massive open ocean polynya in the Es...
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00008195 2023-05-15T13:34:49+02:00 On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products Aguiar, Wilton Mata, Mauricio M. Kerr, Rodrigo 2017-11 electronic https://doi.org/10.5194/os-13-851-2017 https://noa.gwlb.de/receive/cop_mods_00008195 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008152/os-13-851-2017.pdf https://os.copernicus.org/articles/13/851/2017/os-13-851-2017.pdf eng eng Copernicus Publications Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-13-851-2017 https://noa.gwlb.de/receive/cop_mods_00008195 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008152/os-13-851-2017.pdf https://os.copernicus.org/articles/13/851/2017/os-13-851-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/os-13-851-2017 2022-02-08T22:58:07Z Open ocean deep convection is a common source of error in the representation of Antarctic Bottom Water (AABW) formation in ocean general circulation models. Although those events are well described in non-assimilatory ocean simulations, the recent appearance of a massive open ocean polynya in the Estimating the Circulation and Climate of the Ocean Phase II reanalysis product (ECCO2) raises questions on which mechanisms are responsible for those spurious events and whether they are also present in other state-of-the-art assimilatory reanalysis products. To investigate this issue, we evaluate how three recently released high-resolution ocean reanalysis products form AABW in their simulations. We found that two of the products create AABW by open ocean deep convection events in the Weddell Sea that are triggered by the interaction of sea ice with the Warm Deep Water, which shows that the assimilation of sea ice is not enough to avoid the appearance of open ocean polynyas. The third reanalysis, My Ocean University Reading UR025.4, creates AABW using a rather dynamically accurate mechanism. The UR025.4 product depicts both continental shelf convection and the export of Dense Shelf Water to the open ocean. Although the accuracy of the AABW formation in this reanalysis product represents an advancement in the representation of the Southern Ocean dynamics, the differences between the real and simulated processes suggest that substantial improvements in the ocean reanalysis products are still needed to accurately represent AABW formation. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Weddell Sea Niedersächsisches Online-Archiv NOA Antarctic Southern Ocean Weddell Weddell Sea Ocean Science 13 6 851 872 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Aguiar, Wilton Mata, Mauricio M. Kerr, Rodrigo On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products |
topic_facet |
article Verlagsveröffentlichung |
description |
Open ocean deep convection is a common source of error in the representation of Antarctic Bottom Water (AABW) formation in ocean general circulation models. Although those events are well described in non-assimilatory ocean simulations, the recent appearance of a massive open ocean polynya in the Estimating the Circulation and Climate of the Ocean Phase II reanalysis product (ECCO2) raises questions on which mechanisms are responsible for those spurious events and whether they are also present in other state-of-the-art assimilatory reanalysis products. To investigate this issue, we evaluate how three recently released high-resolution ocean reanalysis products form AABW in their simulations. We found that two of the products create AABW by open ocean deep convection events in the Weddell Sea that are triggered by the interaction of sea ice with the Warm Deep Water, which shows that the assimilation of sea ice is not enough to avoid the appearance of open ocean polynyas. The third reanalysis, My Ocean University Reading UR025.4, creates AABW using a rather dynamically accurate mechanism. The UR025.4 product depicts both continental shelf convection and the export of Dense Shelf Water to the open ocean. Although the accuracy of the AABW formation in this reanalysis product represents an advancement in the representation of the Southern Ocean dynamics, the differences between the real and simulated processes suggest that substantial improvements in the ocean reanalysis products are still needed to accurately represent AABW formation. |
format |
Article in Journal/Newspaper |
author |
Aguiar, Wilton Mata, Mauricio M. Kerr, Rodrigo |
author_facet |
Aguiar, Wilton Mata, Mauricio M. Kerr, Rodrigo |
author_sort |
Aguiar, Wilton |
title |
On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products |
title_short |
On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products |
title_full |
On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products |
title_fullStr |
On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products |
title_full_unstemmed |
On deep convection events and Antarctic Bottom Water formation in ocean reanalysis products |
title_sort |
on deep convection events and antarctic bottom water formation in ocean reanalysis products |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/os-13-851-2017 https://noa.gwlb.de/receive/cop_mods_00008195 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008152/os-13-851-2017.pdf https://os.copernicus.org/articles/13/851/2017/os-13-851-2017.pdf |
geographic |
Antarctic Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
op_relation |
Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-13-851-2017 https://noa.gwlb.de/receive/cop_mods_00008195 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008152/os-13-851-2017.pdf https://os.copernicus.org/articles/13/851/2017/os-13-851-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/os-13-851-2017 |
container_title |
Ocean Science |
container_volume |
13 |
container_issue |
6 |
container_start_page |
851 |
op_container_end_page |
872 |
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1766058036191821824 |