Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ...
Much of the Southern Ocean surface south of 55° S cooled and freshened between at least the early 1980s and the early 2010s. Many processes have been proposed to explain the unexpected cooling, including increased winds or freshwater fluxes. However, these mechanisms so far failed to fully explain t...
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ftdatacite:10.3929/ethz-b-000415934 2024-04-28T07:56:21+00:00 Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ... Haumann, Alexander Gruber, Nicolas Münnich, Matthias 2020 application/pdf https://dx.doi.org/10.3929/ethz-b-000415934 http://hdl.handle.net/20.500.11850/415934 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial No Derivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 Southern Ocean sea ice glacial meltwater cooling warming freshwater article-journal Text ScholarlyArticle Journal Article 2020 ftdatacite https://doi.org/10.3929/ethz-b-000415934 2024-04-02T12:34:54Z Much of the Southern Ocean surface south of 55° S cooled and freshened between at least the early 1980s and the early 2010s. Many processes have been proposed to explain the unexpected cooling, including increased winds or freshwater fluxes. However, these mechanisms so far failed to fully explain the surface trends and the concurrent subsurface warming (100 to 500 m). Here, we argue that these trends are predominantly caused by an increased wind‐driven northward sea‐ice transport, enhancing the extraction of freshwater near Antarctica and releasing it in the open ocean. This conclusion is based on factorial experiments with a regional ocean model. In all experiments with an enhanced northward sea‐ice transport, a strengthened salinity‐dominated stratification cools the open‐ocean surface waters between the Subantarctic Front and the sea‐ice edge. The strengthened stratification reduces the downward mixing of cold surface water and the upward heat loss of the warmer waters below, thus warming the subsurface. ... : AGU Advances, 1 (2) ... Article in Journal/Newspaper Antarc* Antarctica Sea ice Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Southern Ocean sea ice glacial meltwater cooling warming freshwater |
spellingShingle |
Southern Ocean sea ice glacial meltwater cooling warming freshwater Haumann, Alexander Gruber, Nicolas Münnich, Matthias Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ... |
topic_facet |
Southern Ocean sea ice glacial meltwater cooling warming freshwater |
description |
Much of the Southern Ocean surface south of 55° S cooled and freshened between at least the early 1980s and the early 2010s. Many processes have been proposed to explain the unexpected cooling, including increased winds or freshwater fluxes. However, these mechanisms so far failed to fully explain the surface trends and the concurrent subsurface warming (100 to 500 m). Here, we argue that these trends are predominantly caused by an increased wind‐driven northward sea‐ice transport, enhancing the extraction of freshwater near Antarctica and releasing it in the open ocean. This conclusion is based on factorial experiments with a regional ocean model. In all experiments with an enhanced northward sea‐ice transport, a strengthened salinity‐dominated stratification cools the open‐ocean surface waters between the Subantarctic Front and the sea‐ice edge. The strengthened stratification reduces the downward mixing of cold surface water and the upward heat loss of the warmer waters below, thus warming the subsurface. ... : AGU Advances, 1 (2) ... |
format |
Article in Journal/Newspaper |
author |
Haumann, Alexander Gruber, Nicolas Münnich, Matthias |
author_facet |
Haumann, Alexander Gruber, Nicolas Münnich, Matthias |
author_sort |
Haumann, Alexander |
title |
Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ... |
title_short |
Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ... |
title_full |
Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ... |
title_fullStr |
Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ... |
title_full_unstemmed |
Sea‐Ice Induced Southern Ocean Subsurface Warming and Surface Cooling in a Warming Climate ... |
title_sort |
sea‐ice induced southern ocean subsurface warming and surface cooling in a warming climate ... |
publisher |
ETH Zurich |
publishDate |
2020 |
url |
https://dx.doi.org/10.3929/ethz-b-000415934 http://hdl.handle.net/20.500.11850/415934 |
genre |
Antarc* Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctica Sea ice Southern Ocean |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial No Derivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000415934 |
_version_ |
1797583017828417536 |