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...
Published in: | International Journal of Climatology |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/500821/ https://doi.org/10.1002/joc.3456 |
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ftnerc:oai:nora.nerc.ac.uk:500821 2024-02-11T09:55:19+01:00 Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent Dash, Mihir K. Pandey, P.C. Vyas, N.K. Turner, John 2013-03-15 http://nora.nerc.ac.uk/id/eprint/500821/ https://doi.org/10.1002/joc.3456 unknown Wiley Dash, Mihir K.; Pandey, P.C.; Vyas, N.K.; Turner, John orcid:0000-0002-6111-5122 . 2013 Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent. International Journal of Climatology, 33 (3). 778-783. https://doi.org/10.1002/joc.3456 <https://doi.org/10.1002/joc.3456> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.1002/joc.3456 2024-01-19T00:03:13Z 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 Natural Environment Research Council: NERC Open Research Archive Amundsen Sea Antarctic Pacific Southern Ocean Weddell Weddell Sea International Journal of Climatology 33 3 778 783 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
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 |
spellingShingle |
Dash, Mihir K. Pandey, P.C. Vyas, N.K. Turner, John Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent |
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 |
Wiley |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/500821/ https://doi.org/10.1002/joc.3456 |
geographic |
Amundsen Sea Antarctic Pacific Southern Ocean Weddell Weddell Sea |
geographic_facet |
Amundsen Sea Antarctic Pacific Southern Ocean Weddell Weddell Sea |
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 orcid:0000-0002-6111-5122 . 2013 Variability in the ENSO-induced southern hemispheric circulation and Antarctic sea ice extent. International Journal of Climatology, 33 (3). 778-783. https://doi.org/10.1002/joc.3456 <https://doi.org/10.1002/joc.3456> |
op_doi |
https://doi.org/10.1002/joc.3456 |
container_title |
International Journal of Climatology |
container_volume |
33 |
container_issue |
3 |
container_start_page |
778 |
op_container_end_page |
783 |
_version_ |
1790595015492239360 |