Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags
In the Amundsen Sea, warm saline Circumpolar Deep Water (CDW) crosses the continental shelf toward the vulnerable West Antarctic ice shelves, contributing to their basal melting. Due to lack of observations, little is known about the spatial and temporal variability of CDW, particularly seasonally....
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:67166 2023-06-06T11:43:14+02:00 Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags Mallett, Helen K. W. Boehme, Lars Fedak, Mike Heywood, Karen J. Stevens, David P. Roquet, Fabien 2018-05-28 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/67166/ https://ueaeprints.uea.ac.uk/id/eprint/67166/1/Mallett_et_al_2018_Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL077430 en eng https://ueaeprints.uea.ac.uk/id/eprint/67166/1/Mallett_et_al_2018_Geophysical_Research_Letters.pdf Mallett, Helen K. W., Boehme, Lars, Fedak, Mike, Heywood, Karen J., Stevens, David P. and Roquet, Fabien (2018) Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags. Geophysical Research Letters, 45 (10). pp. 4982-4990. ISSN 0094-8276 doi:10.1029/2018GL077430 Article PeerReviewed 2018 ftuniveastangl https://doi.org/10.1029/2018GL077430 2023-04-13T22:32:04Z In the Amundsen Sea, warm saline Circumpolar Deep Water (CDW) crosses the continental shelf toward the vulnerable West Antarctic ice shelves, contributing to their basal melting. Due to lack of observations, little is known about the spatial and temporal variability of CDW, particularly seasonally. A new dataset of 6704 seal‐tag temperature and salinity profiles in the easternmost trough between February and December 2014 reveals a CDW layer on average 49 db thicker in late winter (August to October) than in late summer (February to April), the reverse seasonality of that seen at moorings in the western trough. This layer contains more heat in winter, but on the 27.76 kg/m3 density surface CDW is 0.32° C warmer in summer than winter, across the northeastern Amundsen sea, which may indicate wintertime shoaling offshelf changes CDW properties onshelf. In Pine Island Bay these seasonal changes on density surfaces are reduced, likely by gyre circulation. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ice Shelves Pine Island Bay University of East Anglia: UEA Digital Repository Amundsen Sea Antarctic Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Geophysical Research Letters 45 10 4982 4990 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
In the Amundsen Sea, warm saline Circumpolar Deep Water (CDW) crosses the continental shelf toward the vulnerable West Antarctic ice shelves, contributing to their basal melting. Due to lack of observations, little is known about the spatial and temporal variability of CDW, particularly seasonally. A new dataset of 6704 seal‐tag temperature and salinity profiles in the easternmost trough between February and December 2014 reveals a CDW layer on average 49 db thicker in late winter (August to October) than in late summer (February to April), the reverse seasonality of that seen at moorings in the western trough. This layer contains more heat in winter, but on the 27.76 kg/m3 density surface CDW is 0.32° C warmer in summer than winter, across the northeastern Amundsen sea, which may indicate wintertime shoaling offshelf changes CDW properties onshelf. In Pine Island Bay these seasonal changes on density surfaces are reduced, likely by gyre circulation. |
format |
Article in Journal/Newspaper |
author |
Mallett, Helen K. W. Boehme, Lars Fedak, Mike Heywood, Karen J. Stevens, David P. Roquet, Fabien |
spellingShingle |
Mallett, Helen K. W. Boehme, Lars Fedak, Mike Heywood, Karen J. Stevens, David P. Roquet, Fabien Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags |
author_facet |
Mallett, Helen K. W. Boehme, Lars Fedak, Mike Heywood, Karen J. Stevens, David P. Roquet, Fabien |
author_sort |
Mallett, Helen K. W. |
title |
Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags |
title_short |
Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags |
title_full |
Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags |
title_fullStr |
Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags |
title_full_unstemmed |
Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags |
title_sort |
variation in the distribution and properties of circumpolar deep water in the eastern amundsen sea, on seasonal timescales, using seal‐borne tags |
publishDate |
2018 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/67166/ https://ueaeprints.uea.ac.uk/id/eprint/67166/1/Mallett_et_al_2018_Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL077430 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Amundsen Sea Antarctic Island Bay Pine Island Bay |
geographic_facet |
Amundsen Sea Antarctic Island Bay Pine Island Bay |
genre |
Amundsen Sea Antarc* Antarctic Ice Shelves Pine Island Bay |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Shelves Pine Island Bay |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/67166/1/Mallett_et_al_2018_Geophysical_Research_Letters.pdf Mallett, Helen K. W., Boehme, Lars, Fedak, Mike, Heywood, Karen J., Stevens, David P. and Roquet, Fabien (2018) Variation in the distribution and properties of Circumpolar Deep Water in the eastern Amundsen Sea, on seasonal timescales, using seal‐borne tags. Geophysical Research Letters, 45 (10). pp. 4982-4990. ISSN 0094-8276 doi:10.1029/2018GL077430 |
op_doi |
https://doi.org/10.1029/2018GL077430 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
10 |
container_start_page |
4982 |
op_container_end_page |
4990 |
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1767953856916881408 |