Evidence for tropical SST influence on Antarctic polar atmospheric dynamics
A Singular Value Decomposition analysis is applied to climatological data to determine the modes of variability of monthly mean Sea Surface Temperature (SST) in the tropics coupled with the southern hemisphere stratospheric polar vortex intensity for the 1958 to 2006 period and to identify the tropi...
Published in: | Geophysical Research Letters |
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Online Access: | https://www.openaccessrepository.it/record/205096 https://doi.org/10.1029/2009gl038092 |
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ftopenaccessrep:oai:zenodo.org:205096 2024-05-19T07:32:26+00:00 Evidence for tropical SST influence on Antarctic polar atmospheric dynamics Grassi, Barbara Redaelli, Gianluca Visconti, Guido 2009-05-01 https://www.openaccessrepository.it/record/205096 https://doi.org/10.1029/2009gl038092 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/205096 doi:10.1029/2009gl038092 info:eu-repo/semantics/openAccess General Earth and Planetary Sciences Geophysics info:eu-repo/semantics/article publication-article 2009 ftopenaccessrep https://doi.org/10.1029/2009gl038092 2024-04-23T23:57:31Z A Singular Value Decomposition analysis is applied to climatological data to determine the modes of variability of monthly mean Sea Surface Temperature (SST) in the tropics coupled with the southern hemisphere stratospheric polar vortex intensity for the 1958 to 2006 period and to identify the tropical region strongly influencing the high latitude stratospheric dynamics. Two subsets of data have been considered by explicitly taking into account the phase of the Pacific Decadal Oscillation (PDO). The study evidences a shift of the tropical region affecting the polar vortex from the Western Pacific to the Indoâ€Pacific Ocean, driven by the modulation of the SST pattern, due to the phase of the PDO. The analysis shows in both cases (years with positive/negative PDO phases) a high degree of correlation between an SST related index, calculated from NOAA/ERSST and HadISST datasets, and an index of the polar vortex intensity based on ECMWF data. Article in Journal/Newspaper Antarc* Antarctic Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Geophysical Research Letters 36 9 |
institution |
Open Polar |
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Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
General Earth and Planetary Sciences Geophysics |
spellingShingle |
General Earth and Planetary Sciences Geophysics Grassi, Barbara Redaelli, Gianluca Visconti, Guido Evidence for tropical SST influence on Antarctic polar atmospheric dynamics |
topic_facet |
General Earth and Planetary Sciences Geophysics |
description |
A Singular Value Decomposition analysis is applied to climatological data to determine the modes of variability of monthly mean Sea Surface Temperature (SST) in the tropics coupled with the southern hemisphere stratospheric polar vortex intensity for the 1958 to 2006 period and to identify the tropical region strongly influencing the high latitude stratospheric dynamics. Two subsets of data have been considered by explicitly taking into account the phase of the Pacific Decadal Oscillation (PDO). The study evidences a shift of the tropical region affecting the polar vortex from the Western Pacific to the Indoâ€Pacific Ocean, driven by the modulation of the SST pattern, due to the phase of the PDO. The analysis shows in both cases (years with positive/negative PDO phases) a high degree of correlation between an SST related index, calculated from NOAA/ERSST and HadISST datasets, and an index of the polar vortex intensity based on ECMWF data. |
format |
Article in Journal/Newspaper |
author |
Grassi, Barbara Redaelli, Gianluca Visconti, Guido |
author_facet |
Grassi, Barbara Redaelli, Gianluca Visconti, Guido |
author_sort |
Grassi, Barbara |
title |
Evidence for tropical SST influence on Antarctic polar atmospheric dynamics |
title_short |
Evidence for tropical SST influence on Antarctic polar atmospheric dynamics |
title_full |
Evidence for tropical SST influence on Antarctic polar atmospheric dynamics |
title_fullStr |
Evidence for tropical SST influence on Antarctic polar atmospheric dynamics |
title_full_unstemmed |
Evidence for tropical SST influence on Antarctic polar atmospheric dynamics |
title_sort |
evidence for tropical sst influence on antarctic polar atmospheric dynamics |
publishDate |
2009 |
url |
https://www.openaccessrepository.it/record/205096 https://doi.org/10.1029/2009gl038092 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/205096 doi:10.1029/2009gl038092 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2009gl038092 |
container_title |
Geophysical Research Letters |
container_volume |
36 |
container_issue |
9 |
_version_ |
1799470474638393344 |