The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay
A fourth production region for the globally important Antarctic bottom water has been attributed to dense shelf water formation in the Cape Darnley Polynya, adjoining Prydz Bay in East Antarctica. Here we show new observations from CTD-instrumented elephant seals in 2011–2013 that provide the first...
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ftpubmed:oai:pubmedcentral.nih.gov:4996980 2023-05-15T13:56:16+02:00 The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay Williams, G. D. Herraiz-Borreguero, L. Roquet, F. Tamura, T. Ohshima, K. I. Fukamachi, Y. Fraser, A. D. Gao, L. Chen, H. McMahon, C. R. Harcourt, R. Hindell, M. 2016-08-23 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996980/ http://www.ncbi.nlm.nih.gov/pubmed/27552365 https://doi.org/10.1038/ncomms12577 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996980/ http://www.ncbi.nlm.nih.gov/pubmed/27552365 http://dx.doi.org/10.1038/ncomms12577 Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/ncomms12577 2016-09-11T00:07:13Z A fourth production region for the globally important Antarctic bottom water has been attributed to dense shelf water formation in the Cape Darnley Polynya, adjoining Prydz Bay in East Antarctica. Here we show new observations from CTD-instrumented elephant seals in 2011–2013 that provide the first complete assessment of dense shelf water formation in Prydz Bay. After a complex evolution involving opposing contributions from three polynyas (positive) and two ice shelves (negative), dense shelf water (salinity 34.65–34.7) is exported through Prydz Channel. This provides a distinct, relatively fresh contribution to Cape Darnley bottom water. Elsewhere, dense water formation is hindered by the freshwater input from the Amery and West Ice Shelves into the Prydz Bay Gyre. This study highlights the susceptibility of Antarctic bottom water to increased freshwater input from the enhanced melting of ice shelves, and ultimately the potential collapse of Antarctic bottom water formation in a warming climate. Text Antarc* Antarctic Antarctica East Antarctica Elephant Seals Ice Shelves Prydz Bay PubMed Central (PMC) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Antarctic Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) East Antarctica Prydz Bay Prydz Channel ENVELOPE(73.000,73.000,-67.000,-67.000) Nature Communications 7 1 |
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Article Williams, G. D. Herraiz-Borreguero, L. Roquet, F. Tamura, T. Ohshima, K. I. Fukamachi, Y. Fraser, A. D. Gao, L. Chen, H. McMahon, C. R. Harcourt, R. Hindell, M. The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay |
topic_facet |
Article |
description |
A fourth production region for the globally important Antarctic bottom water has been attributed to dense shelf water formation in the Cape Darnley Polynya, adjoining Prydz Bay in East Antarctica. Here we show new observations from CTD-instrumented elephant seals in 2011–2013 that provide the first complete assessment of dense shelf water formation in Prydz Bay. After a complex evolution involving opposing contributions from three polynyas (positive) and two ice shelves (negative), dense shelf water (salinity 34.65–34.7) is exported through Prydz Channel. This provides a distinct, relatively fresh contribution to Cape Darnley bottom water. Elsewhere, dense water formation is hindered by the freshwater input from the Amery and West Ice Shelves into the Prydz Bay Gyre. This study highlights the susceptibility of Antarctic bottom water to increased freshwater input from the enhanced melting of ice shelves, and ultimately the potential collapse of Antarctic bottom water formation in a warming climate. |
format |
Text |
author |
Williams, G. D. Herraiz-Borreguero, L. Roquet, F. Tamura, T. Ohshima, K. I. Fukamachi, Y. Fraser, A. D. Gao, L. Chen, H. McMahon, C. R. Harcourt, R. Hindell, M. |
author_facet |
Williams, G. D. Herraiz-Borreguero, L. Roquet, F. Tamura, T. Ohshima, K. I. Fukamachi, Y. Fraser, A. D. Gao, L. Chen, H. McMahon, C. R. Harcourt, R. Hindell, M. |
author_sort |
Williams, G. D. |
title |
The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay |
title_short |
The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay |
title_full |
The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay |
title_fullStr |
The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay |
title_full_unstemmed |
The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay |
title_sort |
suppression of antarctic bottom water formation by melting ice shelves in prydz bay |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996980/ http://www.ncbi.nlm.nih.gov/pubmed/27552365 https://doi.org/10.1038/ncomms12577 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(69.567,69.567,-67.738,-67.738) ENVELOPE(69.717,69.717,-67.717,-67.717) ENVELOPE(73.000,73.000,-67.000,-67.000) |
geographic |
Amery Antarctic Cape Darnley Darnley East Antarctica Prydz Bay Prydz Channel |
geographic_facet |
Amery Antarctic Cape Darnley Darnley East Antarctica Prydz Bay Prydz Channel |
genre |
Antarc* Antarctic Antarctica East Antarctica Elephant Seals Ice Shelves Prydz Bay |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Elephant Seals Ice Shelves Prydz Bay |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996980/ http://www.ncbi.nlm.nih.gov/pubmed/27552365 http://dx.doi.org/10.1038/ncomms12577 |
op_rights |
Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms12577 |
container_title |
Nature Communications |
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7 |
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1 |
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1766263635746750464 |