Changes in the physical properties of Antarctic shelf water due to global warming
The Antarctic continental shelf plays a critical role in global climate system as a buffer zone of the heat and material exchange between Southern Ocean and Antarctica. To investigate the response of physical properties for Antarctic shelf waters in response to increasing atmospheric greenhouse gase...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5021221 2023-07-30T03:56:05+02:00 Changes in the physical properties of Antarctic shelf water due to global warming Ju, J. Nam, S. Park, T. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021221 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4815 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021221 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-4815 2023-07-09T23:40:22Z The Antarctic continental shelf plays a critical role in global climate system as a buffer zone of the heat and material exchange between Southern Ocean and Antarctica. To investigate the response of physical properties for Antarctic shelf waters in response to increasing atmospheric greenhouse gases, we present a comparison of a fully coupled global climate model, Community Earth System Model version 1.2.2, results between present-day climate run (PC, atmospheric CO 2 is fixed to 367 ppm) and future climate run (FC, atmospheric CO 2 is double to 734 ppm). The latter experiment was branched from 71 year of the control run for 140 years and was integrated for another 100 years. The last 20 years of both simulations were analyzed. The resulting physical properties of Antarctic shelf waters reproduced by PC are generally consistent with what has been known by previous studies except for the Prydz Bay where the considerably warm (T>0.5C) water was simulated and the Cape Darnley where the outflows of dense shelf water were vanished. The FC results demonstrate significant warming (T>0.5°C) on the shelves in Amundsen Sea, Bellingshausen Sea, and eastern Ross Sea, and off the Adelie and Budd coasts, and freshening all over the Antarctic shelves, suppressing the Antarctic bottom water formation. The results suggest weakening of deep and abyssal circulation by suppressed bottom water formation due to increased atmospheric CO 2 concentration along with the potential for more rapid melting of Antarctic ice sheets. Conference Object Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Prydz Bay Ross Sea Southern Ocean GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Amundsen Sea Antarctic Bellingshausen Sea Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) Prydz Bay Ross Sea Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
The Antarctic continental shelf plays a critical role in global climate system as a buffer zone of the heat and material exchange between Southern Ocean and Antarctica. To investigate the response of physical properties for Antarctic shelf waters in response to increasing atmospheric greenhouse gases, we present a comparison of a fully coupled global climate model, Community Earth System Model version 1.2.2, results between present-day climate run (PC, atmospheric CO 2 is fixed to 367 ppm) and future climate run (FC, atmospheric CO 2 is double to 734 ppm). The latter experiment was branched from 71 year of the control run for 140 years and was integrated for another 100 years. The last 20 years of both simulations were analyzed. The resulting physical properties of Antarctic shelf waters reproduced by PC are generally consistent with what has been known by previous studies except for the Prydz Bay where the considerably warm (T>0.5C) water was simulated and the Cape Darnley where the outflows of dense shelf water were vanished. The FC results demonstrate significant warming (T>0.5°C) on the shelves in Amundsen Sea, Bellingshausen Sea, and eastern Ross Sea, and off the Adelie and Budd coasts, and freshening all over the Antarctic shelves, suppressing the Antarctic bottom water formation. The results suggest weakening of deep and abyssal circulation by suppressed bottom water formation due to increased atmospheric CO 2 concentration along with the potential for more rapid melting of Antarctic ice sheets. |
format |
Conference Object |
author |
Ju, J. Nam, S. Park, T. |
spellingShingle |
Ju, J. Nam, S. Park, T. Changes in the physical properties of Antarctic shelf water due to global warming |
author_facet |
Ju, J. Nam, S. Park, T. |
author_sort |
Ju, J. |
title |
Changes in the physical properties of Antarctic shelf water due to global warming |
title_short |
Changes in the physical properties of Antarctic shelf water due to global warming |
title_full |
Changes in the physical properties of Antarctic shelf water due to global warming |
title_fullStr |
Changes in the physical properties of Antarctic shelf water due to global warming |
title_full_unstemmed |
Changes in the physical properties of Antarctic shelf water due to global warming |
title_sort |
changes in the physical properties of antarctic shelf water due to global warming |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021221 |
long_lat |
ENVELOPE(69.567,69.567,-67.738,-67.738) ENVELOPE(69.717,69.717,-67.717,-67.717) |
geographic |
Amundsen Sea Antarctic Bellingshausen Sea Cape Darnley Darnley Prydz Bay Ross Sea Southern Ocean The Antarctic |
geographic_facet |
Amundsen Sea Antarctic Bellingshausen Sea Cape Darnley Darnley Prydz Bay Ross Sea Southern Ocean The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Prydz Bay Ross Sea Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Prydz Bay Ross Sea Southern Ocean |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4815 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021221 |
op_doi |
https://doi.org/10.57757/IUGG23-4815 |
_version_ |
1772810856126480384 |