2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data
The Antarctic continent contains the majority of the global ice volume and plays an important role in a changing climate. The nature and causes of Antarctic climate variability are, however, poorly understood beyond interannual time scales due to the paucity of long, reliable meteorological observat...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.699.2226 2023-05-15T14:00:38+02:00 2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data Yuko M. Okumura David Schneider Clara Deser Rob Wilson The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.699.2226 http://www.cgd.ucar.edu/staff/cdeser/docs/okumura.antarctica_tropics_linkages.jclim12.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.699.2226 http://www.cgd.ucar.edu/staff/cdeser/docs/okumura.antarctica_tropics_linkages.jclim12.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cgd.ucar.edu/staff/cdeser/docs/okumura.antarctica_tropics_linkages.jclim12.pdf text ftciteseerx 2016-01-08T18:47:26Z The Antarctic continent contains the majority of the global ice volume and plays an important role in a changing climate. The nature and causes of Antarctic climate variability are, however, poorly understood beyond interannual time scales due to the paucity of long, reliable meteorological observations. This study analyzes decadal–interdecadal climate variability over Antarctica using a network of annually resolved ice core records and various instrumental and tropical proxy data for the nineteenth and twentieth centuries. During the twentieth century, Antarctic ice core records indicate strong linkages to sea surface temperature (SST) variations in the tropical Pacific and Atlantic on decadal–interdecadal time scales. Antarctic surface temperature anomalies inferred from the ice cores are consistent with the associated changes in atmospheric circulation and thermal advection. A set of atmospheric general circulation model experiments supports the idea that decadal SST variations in the tropics force atmospheric teleconnections that affect Antarctic surface temperatures. When coral and other proxies for tropical climate are used to extend the analysis back to 1799, a similar Antarctic–tropical Pacific linkage is found, although the relationship is weaker during the first half of the nineteenth century. Over the past 50 years, a change in the phase of Pacific and Atlantic interdecadal variability may have contributed to the rapid warming of the Antarctic Peninsula and West Antarctica and related changes in ice sheet dynamics. 1. Text Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Sheet West Antarctica Unknown Antarctic Antarctic Peninsula Pacific The Antarctic West Antarctica |
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English |
description |
The Antarctic continent contains the majority of the global ice volume and plays an important role in a changing climate. The nature and causes of Antarctic climate variability are, however, poorly understood beyond interannual time scales due to the paucity of long, reliable meteorological observations. This study analyzes decadal–interdecadal climate variability over Antarctica using a network of annually resolved ice core records and various instrumental and tropical proxy data for the nineteenth and twentieth centuries. During the twentieth century, Antarctic ice core records indicate strong linkages to sea surface temperature (SST) variations in the tropical Pacific and Atlantic on decadal–interdecadal time scales. Antarctic surface temperature anomalies inferred from the ice cores are consistent with the associated changes in atmospheric circulation and thermal advection. A set of atmospheric general circulation model experiments supports the idea that decadal SST variations in the tropics force atmospheric teleconnections that affect Antarctic surface temperatures. When coral and other proxies for tropical climate are used to extend the analysis back to 1799, a similar Antarctic–tropical Pacific linkage is found, although the relationship is weaker during the first half of the nineteenth century. Over the past 50 years, a change in the phase of Pacific and Atlantic interdecadal variability may have contributed to the rapid warming of the Antarctic Peninsula and West Antarctica and related changes in ice sheet dynamics. 1. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Yuko M. Okumura David Schneider Clara Deser Rob Wilson |
spellingShingle |
Yuko M. Okumura David Schneider Clara Deser Rob Wilson 2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data |
author_facet |
Yuko M. Okumura David Schneider Clara Deser Rob Wilson |
author_sort |
Yuko M. Okumura |
title |
2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data |
title_short |
2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data |
title_full |
2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data |
title_fullStr |
2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data |
title_full_unstemmed |
2012: Decadal-interdecadal climate variability over Antarctica and linkages to the tropics: Analysis of ice core, instrumental, and tropical proxy data |
title_sort |
2012: decadal-interdecadal climate variability over antarctica and linkages to the tropics: analysis of ice core, instrumental, and tropical proxy data |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.699.2226 http://www.cgd.ucar.edu/staff/cdeser/docs/okumura.antarctica_tropics_linkages.jclim12.pdf |
geographic |
Antarctic Antarctic Peninsula Pacific The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Pacific The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Sheet West Antarctica |
op_source |
http://www.cgd.ucar.edu/staff/cdeser/docs/okumura.antarctica_tropics_linkages.jclim12.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.699.2226 http://www.cgd.ucar.edu/staff/cdeser/docs/okumura.antarctica_tropics_linkages.jclim12.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766269866606592000 |