Observing Antarctic bottom water in the Southern Ocean
Antarctic Bottom Water (AABW) occupies most of the deep ocean, trapping heat and carbon away from the atmosphere for centuries. Despite its key role in regulating Earth’s climate on long time scales, AABW is poorly observed. This is mostly due to two factors. 1) AABW originates on the Antarctic cont...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5016014 2023-06-11T04:06:54+02:00 Observing Antarctic bottom water in the Southern Ocean Silvano, A. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016014 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-0454 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016014 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-0454 2023-04-23T23:38:34Z Antarctic Bottom Water (AABW) occupies most of the deep ocean, trapping heat and carbon away from the atmosphere for centuries. Despite its key role in regulating Earth’s climate on long time scales, AABW is poorly observed. This is mostly due to two factors. 1) AABW originates on the Antarctic continental shelf where in situ measurements are limited and ocean observations by satellites are hampered by persistent sea ice cover. 2) North of the Antarctic continental shelf, AABW is found below about 2000 m depth, where in situ observations are also scarce and satellites cannot provide direct measurements. Here we combine different tools, including long term monitoring obtained by ship-based surveys, recent development of autonomous observing tools in coastal Antarctic and deep ocean systems, and satellite-derived proxies, to describe temporal changes in AABW formed in the Ross Sea and its contribution to the lower limb of the Meridional Overturning Circulation. We conclude by comparing these results to what observed in other regions around Antarctica. Conference Object Antarc* Antarctic Antarctica Ross Sea Sea ice Southern Ocean GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic Ross Sea Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Antarctic Bottom Water (AABW) occupies most of the deep ocean, trapping heat and carbon away from the atmosphere for centuries. Despite its key role in regulating Earth’s climate on long time scales, AABW is poorly observed. This is mostly due to two factors. 1) AABW originates on the Antarctic continental shelf where in situ measurements are limited and ocean observations by satellites are hampered by persistent sea ice cover. 2) North of the Antarctic continental shelf, AABW is found below about 2000 m depth, where in situ observations are also scarce and satellites cannot provide direct measurements. Here we combine different tools, including long term monitoring obtained by ship-based surveys, recent development of autonomous observing tools in coastal Antarctic and deep ocean systems, and satellite-derived proxies, to describe temporal changes in AABW formed in the Ross Sea and its contribution to the lower limb of the Meridional Overturning Circulation. We conclude by comparing these results to what observed in other regions around Antarctica. |
format |
Conference Object |
author |
Silvano, A. |
spellingShingle |
Silvano, A. Observing Antarctic bottom water in the Southern Ocean |
author_facet |
Silvano, A. |
author_sort |
Silvano, A. |
title |
Observing Antarctic bottom water in the Southern Ocean |
title_short |
Observing Antarctic bottom water in the Southern Ocean |
title_full |
Observing Antarctic bottom water in the Southern Ocean |
title_fullStr |
Observing Antarctic bottom water in the Southern Ocean |
title_full_unstemmed |
Observing Antarctic bottom water in the Southern Ocean |
title_sort |
observing antarctic bottom water in the southern ocean |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016014 |
geographic |
Antarctic Ross Sea Southern Ocean The Antarctic |
geographic_facet |
Antarctic Ross Sea Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice Southern Ocean |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-0454 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016014 |
op_doi |
https://doi.org/10.57757/IUGG23-0454 |
_version_ |
1768379138778857472 |