Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent
The linkages between the El Niño Southern Oscillation (ENSO) and the sea ice extent (SIE) in the Weddell Sea (South Atlantic) and the Bellingshausen–Amundsen Sea (South-Eastern Pacific) sectors of the Southern Ocean have been studied for the period 1979–2005 using crosswavelet analysis. The analysis...
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John Wiley and Sons
2012
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ftindianacasci:oai:repository.ias.ac.in:94430 2023-05-15T13:24:04+02:00 Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent Dash, Mihir K. Pandey, P. C. Vyas, N. K. Turner, John 2012 http://repository.ias.ac.in/94430/ http://onlinelibrary.wiley.com/doi/10.1002/joc.3456/abstract?systemMessage=Wiley+Online+Library+will+be+disrupted+on+15+September+from+10%3A00-12%3A00+BST+%2805%3A00-07%3A00+EDT%29+for+essential+maintenance&userIsAuthenticated=false&deniedAccessCustomised unknown John Wiley and Sons Dash, Mihir K. Pandey, P. C. Vyas, N. K. Turner, John (2012) Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent International Journal of Climatology . ISSN 0899-8418 QE Geology Article PeerReviewed 2012 ftindianacasci 2013-01-20T13:47:34Z The linkages between the El Niño Southern Oscillation (ENSO) and the sea ice extent (SIE) in the Weddell Sea (South Atlantic) and the Bellingshausen–Amundsen Sea (South-Eastern Pacific) sectors of the Southern Ocean have been studied for the period 1979–2005 using crosswavelet analysis. The analysis showed that the relationship between the tropical expression of ENSO and the SIE in these two areas are different before and after 1992. Further, we investigated the structure and strength of the regional Ferrel cell (RFC) during El Niño and La Niña episodes using composite latitude–pressure cross-sections of wind anomalies for these two periods. Contrasting features were observed in the structure and strength of the RFC before and after 1992 in both, the South Atlantic and the South-Eastern Pacific. These modulations in the RFC control the heat transport from the tropics to high latitudes and hence the extent of sea ice in both the regions. We propose that the modulation of the RFC is responsible for the phase shift in the tropical–polar teleconnection. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Sea ice Southern Ocean Weddell Sea Indian Academy of Sciences: Publication of Fellows Antarctic Southern Ocean Weddell Sea Amundsen Sea Pacific Weddell |
institution |
Open Polar |
collection |
Indian Academy of Sciences: Publication of Fellows |
op_collection_id |
ftindianacasci |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Dash, Mihir K. Pandey, P. C. Vyas, N. K. Turner, John Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent |
topic_facet |
QE Geology |
description |
The linkages between the El Niño Southern Oscillation (ENSO) and the sea ice extent (SIE) in the Weddell Sea (South Atlantic) and the Bellingshausen–Amundsen Sea (South-Eastern Pacific) sectors of the Southern Ocean have been studied for the period 1979–2005 using crosswavelet analysis. The analysis showed that the relationship between the tropical expression of ENSO and the SIE in these two areas are different before and after 1992. Further, we investigated the structure and strength of the regional Ferrel cell (RFC) during El Niño and La Niña episodes using composite latitude–pressure cross-sections of wind anomalies for these two periods. Contrasting features were observed in the structure and strength of the RFC before and after 1992 in both, the South Atlantic and the South-Eastern Pacific. These modulations in the RFC control the heat transport from the tropics to high latitudes and hence the extent of sea ice in both the regions. We propose that the modulation of the RFC is responsible for the phase shift in the tropical–polar teleconnection. |
format |
Article in Journal/Newspaper |
author |
Dash, Mihir K. Pandey, P. C. Vyas, N. K. Turner, John |
author_facet |
Dash, Mihir K. Pandey, P. C. Vyas, N. K. Turner, John |
author_sort |
Dash, Mihir K. |
title |
Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent |
title_short |
Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent |
title_full |
Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent |
title_fullStr |
Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent |
title_full_unstemmed |
Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent |
title_sort |
variability in the enso-induced southern hemispheric circulation and antarctic sea ice extent |
publisher |
John Wiley and Sons |
publishDate |
2012 |
url |
http://repository.ias.ac.in/94430/ http://onlinelibrary.wiley.com/doi/10.1002/joc.3456/abstract?systemMessage=Wiley+Online+Library+will+be+disrupted+on+15+September+from+10%3A00-12%3A00+BST+%2805%3A00-07%3A00+EDT%29+for+essential+maintenance&userIsAuthenticated=false&deniedAccessCustomised |
geographic |
Antarctic Southern Ocean Weddell Sea Amundsen Sea Pacific Weddell |
geographic_facet |
Antarctic Southern Ocean Weddell Sea Amundsen Sea Pacific Weddell |
genre |
Amundsen Sea Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
op_relation |
Dash, Mihir K. Pandey, P. C. Vyas, N. K. Turner, John (2012) Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent International Journal of Climatology . ISSN 0899-8418 |
_version_ |
1766377217658454016 |