Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141
Introduction This report provides an overview of a 2006 cruise to the Amundsen Sea, the oceanographic data collected, and how we intend to use these data to further our understanding of the physical oceanography of this region. The Amundsen Sea, located in the eastern Pacific sector of the Southern...
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ftnerc:oai:nora.nerc.ac.uk:15490 2023-05-15T13:23:44+02:00 Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141 Shoosmith, Deb Jenkins, Adrian 2007 http://nora.nerc.ac.uk/id/eprint/15490/ http://folk.uib.no/ngfso/FRISP/Rep17/shoosmith06.pdf unknown University of Bergen Shoosmith, Deb; Jenkins, Adrian orcid:0000-0002-9117-0616 . 2007 Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141. Forum for Research into Ice Shelf Processes (FRISP), Report, 17. 107-110. Marine Sciences Publication - Article PeerReviewed 2007 ftnerc 2023-02-04T19:29:56Z Introduction This report provides an overview of a 2006 cruise to the Amundsen Sea, the oceanographic data collected, and how we intend to use these data to further our understanding of the physical oceanography of this region. The Amundsen Sea, located in the eastern Pacific sector of the Southern Ocean, is a region where ice shelves are rapidly thinning (Shepherd et al., 2004). The widespread, coherent nature of the thinning suggests a reaction to external forcing. Given that air temperatures are below freezing year-round, the most likely instigator of rapid change is the ocean. The Amundsen and Bellingshausen Seas have water properties unlike anywhere else around Antarctica. Circumpolar Deep Water (CDW), which elsewhere is found only within the Antarctic Circumpolar Current (ACC), floods the continental shelves, resulting in the highest water temperatures to be found around the continent. CDW is characterised by temperatures in excess of 1ºC, which is around 3°C warmer than the surface freezing point. When this water mass has access to the base of an ice shelf, melting is one to two orders of magnitude higher than it would otherwise be. Previous studies have shown the link between rapid melting and the presence of CDW beneath ice shelves (Potter and Paren, 1985; Jacobs et al., 1996), and sub-ice shelf melt rates have been found to be sensitive to relatively minor changes in water temperature (Hellmer et al., 1998). Understanding the mechanisms of the on-shelf transport of CDW and quantifying the associated heat fluxes are clearly key to understanding the oceanographic impact on the ice shelves Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Amundsen Sea Pacific Paren’ ENVELOPE(163.156,163.156,62.416,62.416) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Shoosmith, Deb Jenkins, Adrian Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141 |
topic_facet |
Marine Sciences |
description |
Introduction This report provides an overview of a 2006 cruise to the Amundsen Sea, the oceanographic data collected, and how we intend to use these data to further our understanding of the physical oceanography of this region. The Amundsen Sea, located in the eastern Pacific sector of the Southern Ocean, is a region where ice shelves are rapidly thinning (Shepherd et al., 2004). The widespread, coherent nature of the thinning suggests a reaction to external forcing. Given that air temperatures are below freezing year-round, the most likely instigator of rapid change is the ocean. The Amundsen and Bellingshausen Seas have water properties unlike anywhere else around Antarctica. Circumpolar Deep Water (CDW), which elsewhere is found only within the Antarctic Circumpolar Current (ACC), floods the continental shelves, resulting in the highest water temperatures to be found around the continent. CDW is characterised by temperatures in excess of 1ºC, which is around 3°C warmer than the surface freezing point. When this water mass has access to the base of an ice shelf, melting is one to two orders of magnitude higher than it would otherwise be. Previous studies have shown the link between rapid melting and the presence of CDW beneath ice shelves (Potter and Paren, 1985; Jacobs et al., 1996), and sub-ice shelf melt rates have been found to be sensitive to relatively minor changes in water temperature (Hellmer et al., 1998). Understanding the mechanisms of the on-shelf transport of CDW and quantifying the associated heat fluxes are clearly key to understanding the oceanographic impact on the ice shelves |
format |
Article in Journal/Newspaper |
author |
Shoosmith, Deb Jenkins, Adrian |
author_facet |
Shoosmith, Deb Jenkins, Adrian |
author_sort |
Shoosmith, Deb |
title |
Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141 |
title_short |
Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141 |
title_full |
Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141 |
title_fullStr |
Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141 |
title_full_unstemmed |
Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141 |
title_sort |
oceanographic fieldwork in the amundsen sea: an overview of cruise jr141 |
publisher |
University of Bergen |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/15490/ http://folk.uib.no/ngfso/FRISP/Rep17/shoosmith06.pdf |
long_lat |
ENVELOPE(163.156,163.156,62.416,62.416) |
geographic |
Antarctic Southern Ocean The Antarctic Amundsen Sea Pacific Paren’ |
geographic_facet |
Antarctic Southern Ocean The Antarctic Amundsen Sea Pacific Paren’ |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Southern Ocean |
op_relation |
Shoosmith, Deb; Jenkins, Adrian orcid:0000-0002-9117-0616 . 2007 Oceanographic fieldwork in the Amundsen Sea: an overview of cruise JR141. Forum for Research into Ice Shelf Processes (FRISP), Report, 17. 107-110. |
_version_ |
1766374581027733504 |