Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf
Glacial melt can modify heat transport, and therefore ocean processes, associated with ice front retreat, as revealed by direct observations from the Pine Island Bay region of Antarctica. Pine Island Ice Shelf (PIIS) buttresses the Pine Island Glacier, the key contributor to sea-level rise. PIIS has...
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ftseoulnuniv:oai:s-space.snu.ac.kr:10371/179365 2023-05-15T13:32:30+02:00 Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf Yoon, Seung-Tae Lee, Won Sang Nam, SungHyun Lee, Choon-Ki Yun, Sukyoung Heywood, Karen Boehme, Lars Zheng, Yixi Lee, Inhee Choi, Yeon Jenkins, Adrian Jin, Emilia Kyung Larter, Robert Wellner, Julia Dutrieux, Pierre Bradley, Alexander T. Nam, SungHyun 2022-01-25 https://hdl.handle.net/10371/179365 영어 unknown Nature Publishing Group Nature Communications, Vol.13 No.1, p. 306 2041-1723 https://hdl.handle.net/10371/179365 000742409800005 2-s2.0-85123126610 154120 Article ART 2022 ftseoulnuniv 2023-02-10T02:28:14Z Glacial melt can modify heat transport, and therefore ocean processes, associated with ice front retreat, as revealed by direct observations from the Pine Island Bay region of Antarctica. Pine Island Ice Shelf (PIIS) buttresses the Pine Island Glacier, the key contributor to sea-level rise. PIIS has thinned owing to ocean-driven melting, and its calving front has retreated, leading to buttressing loss. PIIS melting depends primarily on the thermocline variability in its front. Furthermore, local ocean circulation shifts adjust heat transport within Pine Island Bay (PIB), yet oceanic processes underlying the ice front retreat remain unclear. Here, we report a PIB double-gyre that moves with the PIIS calving front and hypothesise that it controls ocean heat input towards PIIS. Glacial melt generates cyclonic and anticyclonic gyres near and off PIIS, and meltwater outflows converge into the anticyclonic gyre with a deep-convex-downward thermocline. The double-gyre migrated eastward as the calving front retreated, placing the anticyclonic gyre over a shallow seafloor ridge, reducing the ocean heat input towards PIIS. Reconfigurations of meltwater-driven gyres associated with moving ice boundaries might be crucial in modulating ocean heat delivery to glacial ice. N 1 Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Pine Island Pine Island Bay Pine Island Glacier Seoul National University: S-Space Antarctic Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
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Open Polar |
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Seoul National University: S-Space |
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ftseoulnuniv |
language |
unknown |
description |
Glacial melt can modify heat transport, and therefore ocean processes, associated with ice front retreat, as revealed by direct observations from the Pine Island Bay region of Antarctica. Pine Island Ice Shelf (PIIS) buttresses the Pine Island Glacier, the key contributor to sea-level rise. PIIS has thinned owing to ocean-driven melting, and its calving front has retreated, leading to buttressing loss. PIIS melting depends primarily on the thermocline variability in its front. Furthermore, local ocean circulation shifts adjust heat transport within Pine Island Bay (PIB), yet oceanic processes underlying the ice front retreat remain unclear. Here, we report a PIB double-gyre that moves with the PIIS calving front and hypothesise that it controls ocean heat input towards PIIS. Glacial melt generates cyclonic and anticyclonic gyres near and off PIIS, and meltwater outflows converge into the anticyclonic gyre with a deep-convex-downward thermocline. The double-gyre migrated eastward as the calving front retreated, placing the anticyclonic gyre over a shallow seafloor ridge, reducing the ocean heat input towards PIIS. Reconfigurations of meltwater-driven gyres associated with moving ice boundaries might be crucial in modulating ocean heat delivery to glacial ice. N 1 |
author2 |
Nam, SungHyun |
format |
Article in Journal/Newspaper |
author |
Yoon, Seung-Tae Lee, Won Sang Nam, SungHyun Lee, Choon-Ki Yun, Sukyoung Heywood, Karen Boehme, Lars Zheng, Yixi Lee, Inhee Choi, Yeon Jenkins, Adrian Jin, Emilia Kyung Larter, Robert Wellner, Julia Dutrieux, Pierre Bradley, Alexander T. |
spellingShingle |
Yoon, Seung-Tae Lee, Won Sang Nam, SungHyun Lee, Choon-Ki Yun, Sukyoung Heywood, Karen Boehme, Lars Zheng, Yixi Lee, Inhee Choi, Yeon Jenkins, Adrian Jin, Emilia Kyung Larter, Robert Wellner, Julia Dutrieux, Pierre Bradley, Alexander T. Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf |
author_facet |
Yoon, Seung-Tae Lee, Won Sang Nam, SungHyun Lee, Choon-Ki Yun, Sukyoung Heywood, Karen Boehme, Lars Zheng, Yixi Lee, Inhee Choi, Yeon Jenkins, Adrian Jin, Emilia Kyung Larter, Robert Wellner, Julia Dutrieux, Pierre Bradley, Alexander T. |
author_sort |
Yoon, Seung-Tae |
title |
Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf |
title_short |
Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf |
title_full |
Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf |
title_fullStr |
Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf |
title_full_unstemmed |
Ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an Antarctic ice shelf |
title_sort |
ice front retreat reconfigures meltwater-driven gyres modulating ocean heat delivery to an antarctic ice shelf |
publisher |
Nature Publishing Group |
publishDate |
2022 |
url |
https://hdl.handle.net/10371/179365 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Island Bay Pine Island Bay Pine Island Glacier |
geographic_facet |
Antarctic Island Bay Pine Island Bay Pine Island Glacier |
genre |
Antarc* Antarctic Antarctica Ice Shelf Pine Island Pine Island Bay Pine Island Glacier |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Pine Island Pine Island Bay Pine Island Glacier |
op_relation |
Nature Communications, Vol.13 No.1, p. 306 2041-1723 https://hdl.handle.net/10371/179365 000742409800005 2-s2.0-85123126610 154120 |
_version_ |
1766027475603685376 |