Circumpolar influence of Weddell Sea anomalies
Antarctic marginal seas are the warm tub for the floating extensions of the Antarctic ice sheet. The analysis of a 200-year (1900--2099) integration of a regional ice-ocean model (BRIOS-2.2) forced with the atmospheric output of an IPCC-20C3M scenario simulation with the coupled atmosphere-sea ice-o...
Main Authors: | , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2008
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/18334/ https://hdl.handle.net/10013/epic.29967 |
id |
ftawi:oai:epic.awi.de:18334 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:18334 2023-05-15T13:39:47+02:00 Circumpolar influence of Weddell Sea anomalies Hellmer, Hartmut Kauker, Frank Timmermann, Ralph 2008 https://epic.awi.de/id/eprint/18334/ https://hdl.handle.net/10013/epic.29967 unknown Hellmer, H. orcid:0000-0002-9357-9853 , Kauker, F. orcid:0000-0002-7976-3005 and Timmermann, R. (2008) Circumpolar influence of Weddell Sea anomalies , EGU General Assembly (OS10), Vienna, Austria. . hdl:10013/epic.29967 EPIC3EGU General Assembly (OS10), Vienna, Austria. Conference notRev 2008 ftawi 2021-12-24T15:32:31Z Antarctic marginal seas are the warm tub for the floating extensions of the Antarctic ice sheet. The analysis of a 200-year (1900--2099) integration of a regional ice-ocean model (BRIOS-2.2) forced with the atmospheric output of an IPCC-20C3M scenario simulation with the coupled atmosphere-sea ice-ocean ECHAM5-MPIOM reveals that these seas exhibit significant decadal variability. Changes in bottom salinity on the southern Weddell Sea continental shelf, caused by a variable sea ice cover and related modification of surface waters near the Greenwich Meridian, influence the circulation such that cold waters from the Weddell Sea flush into the southeast Pacific Ocean with varying intensity. The deep temperature signal propagates westward and onto the continental shelves of the Amundsen and Ross Seas. Weddell Sea anomalies thus could be a new aspect to consider at the present search for mechanisms controlling the flow of warmer deep waters towards the floating extensions of the West Antarctic Ice Sheet. Conference Object Antarc* Antarctic Ice Sheet Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Greenwich Pacific The Antarctic Weddell Weddell Sea West Antarctic Ice Sheet |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Antarctic marginal seas are the warm tub for the floating extensions of the Antarctic ice sheet. The analysis of a 200-year (1900--2099) integration of a regional ice-ocean model (BRIOS-2.2) forced with the atmospheric output of an IPCC-20C3M scenario simulation with the coupled atmosphere-sea ice-ocean ECHAM5-MPIOM reveals that these seas exhibit significant decadal variability. Changes in bottom salinity on the southern Weddell Sea continental shelf, caused by a variable sea ice cover and related modification of surface waters near the Greenwich Meridian, influence the circulation such that cold waters from the Weddell Sea flush into the southeast Pacific Ocean with varying intensity. The deep temperature signal propagates westward and onto the continental shelves of the Amundsen and Ross Seas. Weddell Sea anomalies thus could be a new aspect to consider at the present search for mechanisms controlling the flow of warmer deep waters towards the floating extensions of the West Antarctic Ice Sheet. |
format |
Conference Object |
author |
Hellmer, Hartmut Kauker, Frank Timmermann, Ralph |
spellingShingle |
Hellmer, Hartmut Kauker, Frank Timmermann, Ralph Circumpolar influence of Weddell Sea anomalies |
author_facet |
Hellmer, Hartmut Kauker, Frank Timmermann, Ralph |
author_sort |
Hellmer, Hartmut |
title |
Circumpolar influence of Weddell Sea anomalies |
title_short |
Circumpolar influence of Weddell Sea anomalies |
title_full |
Circumpolar influence of Weddell Sea anomalies |
title_fullStr |
Circumpolar influence of Weddell Sea anomalies |
title_full_unstemmed |
Circumpolar influence of Weddell Sea anomalies |
title_sort |
circumpolar influence of weddell sea anomalies |
publishDate |
2008 |
url |
https://epic.awi.de/id/eprint/18334/ https://hdl.handle.net/10013/epic.29967 |
geographic |
Antarctic Greenwich Pacific The Antarctic Weddell Weddell Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Greenwich Pacific The Antarctic Weddell Weddell Sea West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Sea ice Weddell Sea |
op_source |
EPIC3EGU General Assembly (OS10), Vienna, Austria. |
op_relation |
Hellmer, H. orcid:0000-0002-9357-9853 , Kauker, F. orcid:0000-0002-7976-3005 and Timmermann, R. (2008) Circumpolar influence of Weddell Sea anomalies , EGU General Assembly (OS10), Vienna, Austria. . hdl:10013/epic.29967 |
_version_ |
1766124431138095104 |