Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades
A composite dataset (comprising geopotential height, sea surface temperature, zonal and meridional surface winds, precipitation, cloud cover, surface air temperature, latent plus sensible heat fluxes , and sea ice concentration) has been investigated with the aim of revealing the dominant timescales...
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ftupmarcheiris:oai:iris.univpm.it:11566/265469 2024-01-28T10:00:59+01:00 Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades Dario Cerrone Giannetta Fusco Ian Simmonds Giuseppe Aulicino Giorgio Budillon Cerrone, Dario Fusco, Giannetta Simmonds, Ian Aulicino, Giuseppe Budillon, Giorgio 2017 http://hdl.handle.net/11566/265469 https://www.geophysical-research-abstracts.net/egu2017.html eng eng Copernicus Gesellschaft mbH country:DEU place:Göttingen ispartofbook:EGU 2017 - Geophysical Research Abstracts (GRA) EGU General Assembly 2017 journal:GEOPHYSICAL RESEARCH ABSTRACTS http://hdl.handle.net/11566/265469 https://www.geophysical-research-abstracts.net/egu2017.html climate change climate signals southern hemisphere info:eu-repo/semantics/conferenceObject 2017 ftupmarcheiris 2024-01-03T17:45:26Z A composite dataset (comprising geopotential height, sea surface temperature, zonal and meridional surface winds, precipitation, cloud cover, surface air temperature, latent plus sensible heat fluxes , and sea ice concentration) has been investigated with the aim of revealing the dominant timescales of variability from 1982 to 2013. Three covarying climate signals associated with variations in the sea ice distribution around Antarctica have been detected through the application of the Multiple-Taper Method with Singular Value Decomposition (MTM-SVD). Features of the established patterns of variation over the Southern Hemisphere (SH) extratropics have been identified in each of these three climate signals in the form of coupled or individual oscillations. The climate patterns consideredhere are the Southern Annular Mode (SAM), the Pacific-South America (PSA) teleconnection, the Semi-Annual Oscillation (SAO) and Zonal Wavenumber-3 (ZW3) mode. It is shown that most of the sea ice temporal variance isconcentrated at the quasi-triennial scale resulting from the constructive superposition of the PSA and ZW3 patterns.In addition the combination of the SAM and SAO patterns is found to promote the interannual sea ice variations underlying a general change in the Southern Ocean atmospheric and oceanic circulations. These two modes of variability are also found consistent with the occurrence of the SAM+/PSA- or SAM-/PSA+ combinations, which could have favored the cooling of the sub-Antarctic and important changes in the Antarctic sea ice distribution since 2000. Conference Object Antarc* Antarctic Antarctica Sea ice Southern Ocean Università Politecnica delle Marche: IRIS Antarctic Pacific Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Università Politecnica delle Marche: IRIS |
op_collection_id |
ftupmarcheiris |
language |
English |
topic |
climate change climate signals southern hemisphere |
spellingShingle |
climate change climate signals southern hemisphere Dario Cerrone Giannetta Fusco Ian Simmonds Giuseppe Aulicino Giorgio Budillon Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades |
topic_facet |
climate change climate signals southern hemisphere |
description |
A composite dataset (comprising geopotential height, sea surface temperature, zonal and meridional surface winds, precipitation, cloud cover, surface air temperature, latent plus sensible heat fluxes , and sea ice concentration) has been investigated with the aim of revealing the dominant timescales of variability from 1982 to 2013. Three covarying climate signals associated with variations in the sea ice distribution around Antarctica have been detected through the application of the Multiple-Taper Method with Singular Value Decomposition (MTM-SVD). Features of the established patterns of variation over the Southern Hemisphere (SH) extratropics have been identified in each of these three climate signals in the form of coupled or individual oscillations. The climate patterns consideredhere are the Southern Annular Mode (SAM), the Pacific-South America (PSA) teleconnection, the Semi-Annual Oscillation (SAO) and Zonal Wavenumber-3 (ZW3) mode. It is shown that most of the sea ice temporal variance isconcentrated at the quasi-triennial scale resulting from the constructive superposition of the PSA and ZW3 patterns.In addition the combination of the SAM and SAO patterns is found to promote the interannual sea ice variations underlying a general change in the Southern Ocean atmospheric and oceanic circulations. These two modes of variability are also found consistent with the occurrence of the SAM+/PSA- or SAM-/PSA+ combinations, which could have favored the cooling of the sub-Antarctic and important changes in the Antarctic sea ice distribution since 2000. |
author2 |
Cerrone, Dario Fusco, Giannetta Simmonds, Ian Aulicino, Giuseppe Budillon, Giorgio |
format |
Conference Object |
author |
Dario Cerrone Giannetta Fusco Ian Simmonds Giuseppe Aulicino Giorgio Budillon |
author_facet |
Dario Cerrone Giannetta Fusco Ian Simmonds Giuseppe Aulicino Giorgio Budillon |
author_sort |
Dario Cerrone |
title |
Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades |
title_short |
Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades |
title_full |
Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades |
title_fullStr |
Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades |
title_full_unstemmed |
Dominant covarying climate signals in the Southern Ocean and AntarcticSea Ice influence during last three decades |
title_sort |
dominant covarying climate signals in the southern ocean and antarcticsea ice influence during last three decades |
publisher |
Copernicus Gesellschaft mbH |
publishDate |
2017 |
url |
http://hdl.handle.net/11566/265469 https://www.geophysical-research-abstracts.net/egu2017.html |
geographic |
Antarctic Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_relation |
ispartofbook:EGU 2017 - Geophysical Research Abstracts (GRA) EGU General Assembly 2017 journal:GEOPHYSICAL RESEARCH ABSTRACTS http://hdl.handle.net/11566/265469 https://www.geophysical-research-abstracts.net/egu2017.html |
_version_ |
1789325631268323328 |