2011: Winter warming in West Antarctica caused by central tropical Pacific warming
substantial warming in the past 30 years. An increase in the circumpolar westerlies, owing in part to the decline in stratospheric ozone concentrations since the late 1970s, may account for warming trends in the peninsula region in austral summer and autumn. The more widespread warming in continenta...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.459.8689 2023-05-15T13:24:08+02:00 2011: Winter warming in West Antarctica caused by central tropical Pacific warming Qinghua Ding Eric J. Steig David S. Battisti Marcel Küttel The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.459.8689 http://www.atmos.washington.edu/~david/ding_etal_2011.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.459.8689 http://www.atmos.washington.edu/~david/ding_etal_2011.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.atmos.washington.edu/~david/ding_etal_2011.pdf text ftciteseerx 2016-01-08T06:27:04Z substantial warming in the past 30 years. An increase in the circumpolar westerlies, owing in part to the decline in stratospheric ozone concentrations since the late 1970s, may account for warming trends in the peninsula region in austral summer and autumn. The more widespread warming in continental West Antarctica (Ellsworth Land and Marie Byrd Land) occurs primarily in austral winter and spring, and remains unexplained. Here we use observations of Antarctic surface temperature and global sea surface temperature, and atmospheric circulation data to show that recent warming in continental West Antarctica is linked to sea surface temperature changes in the tropical Pacific. Over the past 30 years, anomalous sea surface temperatures in the central tropical Pacific have generated an atmospheric Rossby wave response that influences atmospheric circulation over the Amundsen Sea, causing increased advection of warm air to the Antarctic continent. General circulation model experiments show that the central tropical Pacific is a critical region for producing the observed high latitude response. We conclude that, by affecting the atmospheric circulation at high southern latitudes, increasing tropical sea surface temperatures may account for West Antarctic warming through most of the twentieth century. It has long been known that parts of the Antarctic Peninsulaare warming rapidly1. Recently, it has been recognized thatsignificant warming trends extend considerably south of the Peninsula to include much of continental West Antarctica2,3, comprised of Ellsworth Land (∼79◦W to 103◦W) and Marie Byrd Land (∼103◦W to 158◦W). West Antarctica is the key Text Amundsen Sea Antarc* Antarctic Antarctica Marie Byrd Land West Antarctica Unknown Amundsen Sea Antarctic Austral Byrd Ellsworth Land ENVELOPE(-85.000,-85.000,-75.000,-75.000) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Pacific The Antarctic West Antarctica |
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English |
description |
substantial warming in the past 30 years. An increase in the circumpolar westerlies, owing in part to the decline in stratospheric ozone concentrations since the late 1970s, may account for warming trends in the peninsula region in austral summer and autumn. The more widespread warming in continental West Antarctica (Ellsworth Land and Marie Byrd Land) occurs primarily in austral winter and spring, and remains unexplained. Here we use observations of Antarctic surface temperature and global sea surface temperature, and atmospheric circulation data to show that recent warming in continental West Antarctica is linked to sea surface temperature changes in the tropical Pacific. Over the past 30 years, anomalous sea surface temperatures in the central tropical Pacific have generated an atmospheric Rossby wave response that influences atmospheric circulation over the Amundsen Sea, causing increased advection of warm air to the Antarctic continent. General circulation model experiments show that the central tropical Pacific is a critical region for producing the observed high latitude response. We conclude that, by affecting the atmospheric circulation at high southern latitudes, increasing tropical sea surface temperatures may account for West Antarctic warming through most of the twentieth century. It has long been known that parts of the Antarctic Peninsulaare warming rapidly1. Recently, it has been recognized thatsignificant warming trends extend considerably south of the Peninsula to include much of continental West Antarctica2,3, comprised of Ellsworth Land (∼79◦W to 103◦W) and Marie Byrd Land (∼103◦W to 158◦W). West Antarctica is the key |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Qinghua Ding Eric J. Steig David S. Battisti Marcel Küttel |
spellingShingle |
Qinghua Ding Eric J. Steig David S. Battisti Marcel Küttel 2011: Winter warming in West Antarctica caused by central tropical Pacific warming |
author_facet |
Qinghua Ding Eric J. Steig David S. Battisti Marcel Küttel |
author_sort |
Qinghua Ding |
title |
2011: Winter warming in West Antarctica caused by central tropical Pacific warming |
title_short |
2011: Winter warming in West Antarctica caused by central tropical Pacific warming |
title_full |
2011: Winter warming in West Antarctica caused by central tropical Pacific warming |
title_fullStr |
2011: Winter warming in West Antarctica caused by central tropical Pacific warming |
title_full_unstemmed |
2011: Winter warming in West Antarctica caused by central tropical Pacific warming |
title_sort |
2011: winter warming in west antarctica caused by central tropical pacific warming |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.459.8689 http://www.atmos.washington.edu/~david/ding_etal_2011.pdf |
long_lat |
ENVELOPE(-85.000,-85.000,-75.000,-75.000) ENVELOPE(-130.000,-130.000,-78.000,-78.000) |
geographic |
Amundsen Sea Antarctic Austral Byrd Ellsworth Land Marie Byrd Land Pacific The Antarctic West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Austral Byrd Ellsworth Land Marie Byrd Land Pacific The Antarctic West Antarctica |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Marie Byrd Land West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Marie Byrd Land West Antarctica |
op_source |
http://www.atmos.washington.edu/~david/ding_etal_2011.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.459.8689 http://www.atmos.washington.edu/~david/ding_etal_2011.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766377639267794944 |