Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic
Abstract West Antarctic and the Antarctic Peninsula have experienced dramatic warming in austral spring since the 1970s. Using observations and the Community Atmosphere Model version 4 (CAM4), this study explores the physical mechanism by which the tropical Pacific and Indian Ocean temperature anoma...
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ftdoajarticles:oai:doaj.org/article:a3788e10733942e882b6587daafd4ce6 2023-06-18T03:35:55+02:00 Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic Ping Zhang Anmin Duan 2023-05-01T00:00:00Z https://doi.org/10.1038/s41612-023-00381-8 https://doaj.org/article/a3788e10733942e882b6587daafd4ce6 EN eng Nature Portfolio https://doi.org/10.1038/s41612-023-00381-8 https://doaj.org/toc/2397-3722 doi:10.1038/s41612-023-00381-8 2397-3722 https://doaj.org/article/a3788e10733942e882b6587daafd4ce6 npj Climate and Atmospheric Science, Vol 6, Iss 1, Pp 1-9 (2023) Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1038/s41612-023-00381-8 2023-06-04T00:40:34Z Abstract West Antarctic and the Antarctic Peninsula have experienced dramatic warming in austral spring since the 1970s. Using observations and the Community Atmosphere Model version 4 (CAM4), this study explores the physical mechanism by which the tropical Pacific and Indian Ocean temperature anomaly mode (PIM) affects the dipolar surface air temperature (SAT) anomalies across the West Antarctic in austral spring. The positive phase of the PIM, characterized by positive sea surface temperature anomalies (SSTAs) in the tropical central-eastern Pacific and western Indian Ocean and negative SSTAs in the Maritime Continent, can generate two branches of stationary Rossby wave trains propagating from the tropical central Pacific and southeastern Indian Ocean to the West Antarctic, with an anticyclonic anomaly appearing over the Amundsen Sea. The northerlies advect warmer air to the Ross–Amundsen Seas, but southerlies advect colder air to the Antarctic Peninsula–Weddell Sea, resulting in the dipole of SAT anomalies over the West Antarctic. In this process, the role of tropical central-eastern Pacific SSTAs dominate, and it is amplified by the SSTAs around the Maritime Continent. The SSTAs in the western Indian Ocean combined with the SSTAs over the Maritime Continent further contribute to the western pole of the SAT. Only simulation that includes a prescribed PIM forcing can exactly reproduce the observations of the dipolar SAT response across the West Antarctic, indicating the need to treat the tropical Pacific and Indian Oceans as a unified whole. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Peninsula Weddell Sea Directory of Open Access Journals: DOAJ Articles Amundsen Sea Antarctic Antarctic Peninsula Austral Indian Pacific The Antarctic Weddell Weddell Sea npj Climate and Atmospheric Science 6 1 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Ping Zhang Anmin Duan Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic |
topic_facet |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Abstract West Antarctic and the Antarctic Peninsula have experienced dramatic warming in austral spring since the 1970s. Using observations and the Community Atmosphere Model version 4 (CAM4), this study explores the physical mechanism by which the tropical Pacific and Indian Ocean temperature anomaly mode (PIM) affects the dipolar surface air temperature (SAT) anomalies across the West Antarctic in austral spring. The positive phase of the PIM, characterized by positive sea surface temperature anomalies (SSTAs) in the tropical central-eastern Pacific and western Indian Ocean and negative SSTAs in the Maritime Continent, can generate two branches of stationary Rossby wave trains propagating from the tropical central Pacific and southeastern Indian Ocean to the West Antarctic, with an anticyclonic anomaly appearing over the Amundsen Sea. The northerlies advect warmer air to the Ross–Amundsen Seas, but southerlies advect colder air to the Antarctic Peninsula–Weddell Sea, resulting in the dipole of SAT anomalies over the West Antarctic. In this process, the role of tropical central-eastern Pacific SSTAs dominate, and it is amplified by the SSTAs around the Maritime Continent. The SSTAs in the western Indian Ocean combined with the SSTAs over the Maritime Continent further contribute to the western pole of the SAT. Only simulation that includes a prescribed PIM forcing can exactly reproduce the observations of the dipolar SAT response across the West Antarctic, indicating the need to treat the tropical Pacific and Indian Oceans as a unified whole. |
format |
Article in Journal/Newspaper |
author |
Ping Zhang Anmin Duan |
author_facet |
Ping Zhang Anmin Duan |
author_sort |
Ping Zhang |
title |
Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic |
title_short |
Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic |
title_full |
Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic |
title_fullStr |
Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic |
title_full_unstemmed |
Connection between the Tropical Pacific and Indian Ocean and Temperature Anomaly across West Antarctic |
title_sort |
connection between the tropical pacific and indian ocean and temperature anomaly across west antarctic |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41612-023-00381-8 https://doaj.org/article/a3788e10733942e882b6587daafd4ce6 |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Austral Indian Pacific The Antarctic Weddell Weddell Sea |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Austral Indian Pacific The Antarctic Weddell Weddell Sea |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Weddell Sea |
op_source |
npj Climate and Atmospheric Science, Vol 6, Iss 1, Pp 1-9 (2023) |
op_relation |
https://doi.org/10.1038/s41612-023-00381-8 https://doaj.org/toc/2397-3722 doi:10.1038/s41612-023-00381-8 2397-3722 https://doaj.org/article/a3788e10733942e882b6587daafd4ce6 |
op_doi |
https://doi.org/10.1038/s41612-023-00381-8 |
container_title |
npj Climate and Atmospheric Science |
container_volume |
6 |
container_issue |
1 |
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1769003010845835264 |