Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation
Antarctic Bottom Water (AABW) occupies the abyssal layer of the world ocean and contributes to the global overturning circulation. It originates from dense shelf water, which forms from brine rejection during sea ice production. An important region of AABW formation has been identified off the Cape...
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ftpubmed:oai:pubmedcentral.nih.gov:9581479 2023-05-15T13:32:47+02:00 Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation Ohshima, Kay I. Fukamachi, Yasushi Ito, Masato Nakata, Kazuki Simizu, Daisuke Ono, Kazuya Nomura, Daiki Hashida, Gen Tamura, Takeshi 2022-10-19 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9581479/ http://www.ncbi.nlm.nih.gov/pubmed/36260668 https://doi.org/10.1126/sciadv.adc9174 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9581479/ http://www.ncbi.nlm.nih.gov/pubmed/36260668 http://dx.doi.org/10.1126/sciadv.adc9174 Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. CC-BY-NC Sci Adv Earth Environmental Ecological and Space Sciences Text 2022 ftpubmed https://doi.org/10.1126/sciadv.adc9174 2022-10-30T00:35:21Z Antarctic Bottom Water (AABW) occupies the abyssal layer of the world ocean and contributes to the global overturning circulation. It originates from dense shelf water, which forms from brine rejection during sea ice production. An important region of AABW formation has been identified off the Cape Darnley polynya. However, it remains unclear why and how high ice production leads to AABW formation. Using moored acoustic measurements and a satellite microwave algorithm, we reveal that underwater frazil ice dominates in the polynya. This underwater ice formation prevents heat-insulating surface-cover ice forming, thereby enabling efficient ice production. The high ice production in the nearshore and longer residence times create high-salinity source water for the AABW. Underwater frazil ice occurs as long as strong winds continue and occasionally penetrates depths of at least 80 m. Deep-penetrating frazil ice is particularly prominent in this polynya, while it also occurs in other Antarctic coastal polynyas. Text Antarc* Antarctic Sea ice PubMed Central (PMC) Antarctic Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) Science Advances 8 42 |
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Open Polar |
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PubMed Central (PMC) |
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ftpubmed |
language |
English |
topic |
Earth Environmental Ecological and Space Sciences |
spellingShingle |
Earth Environmental Ecological and Space Sciences Ohshima, Kay I. Fukamachi, Yasushi Ito, Masato Nakata, Kazuki Simizu, Daisuke Ono, Kazuya Nomura, Daiki Hashida, Gen Tamura, Takeshi Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation |
topic_facet |
Earth Environmental Ecological and Space Sciences |
description |
Antarctic Bottom Water (AABW) occupies the abyssal layer of the world ocean and contributes to the global overturning circulation. It originates from dense shelf water, which forms from brine rejection during sea ice production. An important region of AABW formation has been identified off the Cape Darnley polynya. However, it remains unclear why and how high ice production leads to AABW formation. Using moored acoustic measurements and a satellite microwave algorithm, we reveal that underwater frazil ice dominates in the polynya. This underwater ice formation prevents heat-insulating surface-cover ice forming, thereby enabling efficient ice production. The high ice production in the nearshore and longer residence times create high-salinity source water for the AABW. Underwater frazil ice occurs as long as strong winds continue and occasionally penetrates depths of at least 80 m. Deep-penetrating frazil ice is particularly prominent in this polynya, while it also occurs in other Antarctic coastal polynyas. |
format |
Text |
author |
Ohshima, Kay I. Fukamachi, Yasushi Ito, Masato Nakata, Kazuki Simizu, Daisuke Ono, Kazuya Nomura, Daiki Hashida, Gen Tamura, Takeshi |
author_facet |
Ohshima, Kay I. Fukamachi, Yasushi Ito, Masato Nakata, Kazuki Simizu, Daisuke Ono, Kazuya Nomura, Daiki Hashida, Gen Tamura, Takeshi |
author_sort |
Ohshima, Kay I. |
title |
Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation |
title_short |
Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation |
title_full |
Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation |
title_fullStr |
Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation |
title_full_unstemmed |
Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation |
title_sort |
dominant frazil ice production in the cape darnley polynya leading to antarctic bottom water formation |
publisher |
American Association for the Advancement of Science |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9581479/ http://www.ncbi.nlm.nih.gov/pubmed/36260668 https://doi.org/10.1126/sciadv.adc9174 |
long_lat |
ENVELOPE(69.567,69.567,-67.738,-67.738) ENVELOPE(69.717,69.717,-67.717,-67.717) |
geographic |
Antarctic Cape Darnley Darnley |
geographic_facet |
Antarctic Cape Darnley Darnley |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9581479/ http://www.ncbi.nlm.nih.gov/pubmed/36260668 http://dx.doi.org/10.1126/sciadv.adc9174 |
op_rights |
Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.adc9174 |
container_title |
Science Advances |
container_volume |
8 |
container_issue |
42 |
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1766035895854563328 |