Impact of sea-ice formation on the properties of Antarctic Bottom Water
It is generally accepted that fresh-water fluxes due to ice accretion or melting profoundly influence the formation of Antarctic bottom water (AABW). This is investigated by means of a global, three-dimensional ice-ocean model. Two model runs were conducted. At the high southern latitudes, the contr...
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ftunivlouvain:oai:dial.uclouvain.be:boreal:129426 2024-05-19T07:28:38+00:00 Impact of sea-ice formation on the properties of Antarctic Bottom Water Goosse, Hugues Campin, Jean- Michel Fichefet, Thierry Deleersnijder, Eric UCL - SST/ELI/ELIC - Earth & Climate 1997 http://hdl.handle.net/2078.1/129426 eng eng International Glaciological Society boreal:129426 http://hdl.handle.net/2078.1/129426 urn:ISSN:0260-3055 urn:EISSN:1727-5644 info:eu-repo/semantics/restrictedAccess Annals of Glaciology, Vol. 25, p. 276-281 (1997) bottom water ocean-ice system salinity salt advection sea ice 1443 info:eu-repo/semantics/article 1997 ftunivlouvain 2024-04-24T01:38:40Z It is generally accepted that fresh-water fluxes due to ice accretion or melting profoundly influence the formation of Antarctic bottom water (AABW). This is investigated by means of a global, three-dimensional ice-ocean model. Two model runs were conducted. At the high southern latitudes, the control experiment exhibits positive (i.e. towards the ocean) fresh-water fluxes over the deep ocean, and large negative fluxes over the Antarctic continental shelf, because of the intense ice-production taking place in this region. The salinity of shelf water can increase in such a way that deep-water formation is facilitated. The simulated net fresh-water flux over the shelf has an annual mean value of -1 m a-1. This flux induces a transport of salt to bottom waters, which corresponds to an increase of their salinity estimated to be around 0.05 psu. In the second model run, the fresh-water fluxes due to ice melting or freezing are neglected, leading to a rearrangement of the water masses. In particular, the AABW-formation rate decreases, which allows the influence of North Atlantic deep water (NADW) to increase. As NADW is warmer and saltier than AABW, the bottom-water salinity and temperature become higher. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Sea ice DIAL@UCLouvain (Université catholique de Louvain) |
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Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
bottom water ocean-ice system salinity salt advection sea ice 1443 |
spellingShingle |
bottom water ocean-ice system salinity salt advection sea ice 1443 Goosse, Hugues Campin, Jean- Michel Fichefet, Thierry Deleersnijder, Eric Impact of sea-ice formation on the properties of Antarctic Bottom Water |
topic_facet |
bottom water ocean-ice system salinity salt advection sea ice 1443 |
description |
It is generally accepted that fresh-water fluxes due to ice accretion or melting profoundly influence the formation of Antarctic bottom water (AABW). This is investigated by means of a global, three-dimensional ice-ocean model. Two model runs were conducted. At the high southern latitudes, the control experiment exhibits positive (i.e. towards the ocean) fresh-water fluxes over the deep ocean, and large negative fluxes over the Antarctic continental shelf, because of the intense ice-production taking place in this region. The salinity of shelf water can increase in such a way that deep-water formation is facilitated. The simulated net fresh-water flux over the shelf has an annual mean value of -1 m a-1. This flux induces a transport of salt to bottom waters, which corresponds to an increase of their salinity estimated to be around 0.05 psu. In the second model run, the fresh-water fluxes due to ice melting or freezing are neglected, leading to a rearrangement of the water masses. In particular, the AABW-formation rate decreases, which allows the influence of North Atlantic deep water (NADW) to increase. As NADW is warmer and saltier than AABW, the bottom-water salinity and temperature become higher. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Goosse, Hugues Campin, Jean- Michel Fichefet, Thierry Deleersnijder, Eric |
author_facet |
Goosse, Hugues Campin, Jean- Michel Fichefet, Thierry Deleersnijder, Eric |
author_sort |
Goosse, Hugues |
title |
Impact of sea-ice formation on the properties of Antarctic Bottom Water |
title_short |
Impact of sea-ice formation on the properties of Antarctic Bottom Water |
title_full |
Impact of sea-ice formation on the properties of Antarctic Bottom Water |
title_fullStr |
Impact of sea-ice formation on the properties of Antarctic Bottom Water |
title_full_unstemmed |
Impact of sea-ice formation on the properties of Antarctic Bottom Water |
title_sort |
impact of sea-ice formation on the properties of antarctic bottom water |
publisher |
International Glaciological Society |
publishDate |
1997 |
url |
http://hdl.handle.net/2078.1/129426 |
genre |
Annals of Glaciology Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Sea ice |
genre_facet |
Annals of Glaciology Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Sea ice |
op_source |
Annals of Glaciology, Vol. 25, p. 276-281 (1997) |
op_relation |
boreal:129426 http://hdl.handle.net/2078.1/129426 urn:ISSN:0260-3055 urn:EISSN:1727-5644 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1799475174688423936 |