Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends
A strengthening of the Amundsen Sea low from 1979 to 2013 has been shown to largely explain the observed increase in Antarctic sea ice concentration in the eastern Ross Sea and decrease in the Bellingshausen Sea. Here it is shown that while these changes are not generally seen in freely running coup...
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ftosti:oai:osti.gov:1537017 2023-07-30T03:56:02+02:00 Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends Purich, Ariaan England, Matthew H. Cai, Wenju Chikamoto, Yoshimitsu Timmermann, Axel Fyfe, John C. Frankcombe, Leela Meehl, Gerald A. Arblaster, Julie M. 2022-01-03 application/pdf http://www.osti.gov/servlets/purl/1537017 https://www.osti.gov/biblio/1537017 https://doi.org/10.1175/jcli-d-16-0440.1 unknown http://www.osti.gov/servlets/purl/1537017 https://www.osti.gov/biblio/1537017 https://doi.org/10.1175/jcli-d-16-0440.1 doi:10.1175/jcli-d-16-0440.1 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1175/jcli-d-16-0440.1 2023-07-11T09:34:54Z A strengthening of the Amundsen Sea low from 1979 to 2013 has been shown to largely explain the observed increase in Antarctic sea ice concentration in the eastern Ross Sea and decrease in the Bellingshausen Sea. Here it is shown that while these changes are not generally seen in freely running coupled climate model simulations, they are reproduced in simulations of two independent coupled climate models: one constrained by observed sea surface temperature anomalies in the tropical Pacific and the other by observed surface wind stress in the tropics. This analysis confirms previous results and strengthens the conclusion that the phase change in the interdecadal Pacific oscillation from positive to negative over 1979–2013 contributed to the observed strengthening of the Amundsen Sea low and the associated pattern of Antarctic sea ice change during this period. New support for this conclusion is provided by simulated trends in spatial patterns of sea ice concentrations that are similar to those observed. These results highlight the importance of accounting for teleconnections from low to high latitudes in both model simulations and observations of Antarctic sea ice variability and change. Other/Unknown Material Amundsen Sea Antarc* Antarctic Bellingshausen Sea Ross Sea Sea ice SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic Ross Sea Amundsen Sea Bellingshausen Sea Pacific Journal of Climate 29 24 8931 8948 |
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Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Purich, Ariaan England, Matthew H. Cai, Wenju Chikamoto, Yoshimitsu Timmermann, Axel Fyfe, John C. Frankcombe, Leela Meehl, Gerald A. Arblaster, Julie M. Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
A strengthening of the Amundsen Sea low from 1979 to 2013 has been shown to largely explain the observed increase in Antarctic sea ice concentration in the eastern Ross Sea and decrease in the Bellingshausen Sea. Here it is shown that while these changes are not generally seen in freely running coupled climate model simulations, they are reproduced in simulations of two independent coupled climate models: one constrained by observed sea surface temperature anomalies in the tropical Pacific and the other by observed surface wind stress in the tropics. This analysis confirms previous results and strengthens the conclusion that the phase change in the interdecadal Pacific oscillation from positive to negative over 1979–2013 contributed to the observed strengthening of the Amundsen Sea low and the associated pattern of Antarctic sea ice change during this period. New support for this conclusion is provided by simulated trends in spatial patterns of sea ice concentrations that are similar to those observed. These results highlight the importance of accounting for teleconnections from low to high latitudes in both model simulations and observations of Antarctic sea ice variability and change. |
author |
Purich, Ariaan England, Matthew H. Cai, Wenju Chikamoto, Yoshimitsu Timmermann, Axel Fyfe, John C. Frankcombe, Leela Meehl, Gerald A. Arblaster, Julie M. |
author_facet |
Purich, Ariaan England, Matthew H. Cai, Wenju Chikamoto, Yoshimitsu Timmermann, Axel Fyfe, John C. Frankcombe, Leela Meehl, Gerald A. Arblaster, Julie M. |
author_sort |
Purich, Ariaan |
title |
Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends |
title_short |
Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends |
title_full |
Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends |
title_fullStr |
Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends |
title_full_unstemmed |
Tropical Pacific SST Drivers of Recent Antarctic Sea Ice Trends |
title_sort |
tropical pacific sst drivers of recent antarctic sea ice trends |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1537017 https://www.osti.gov/biblio/1537017 https://doi.org/10.1175/jcli-d-16-0440.1 |
geographic |
Antarctic Ross Sea Amundsen Sea Bellingshausen Sea Pacific |
geographic_facet |
Antarctic Ross Sea Amundsen Sea Bellingshausen Sea Pacific |
genre |
Amundsen Sea Antarc* Antarctic Bellingshausen Sea Ross Sea Sea ice |
genre_facet |
Amundsen Sea Antarc* Antarctic Bellingshausen Sea Ross Sea Sea ice |
op_relation |
http://www.osti.gov/servlets/purl/1537017 https://www.osti.gov/biblio/1537017 https://doi.org/10.1175/jcli-d-16-0440.1 doi:10.1175/jcli-d-16-0440.1 |
op_doi |
https://doi.org/10.1175/jcli-d-16-0440.1 |
container_title |
Journal of Climate |
container_volume |
29 |
container_issue |
24 |
container_start_page |
8931 |
op_container_end_page |
8948 |
_version_ |
1772810741649244160 |