Observed modes of sea surface temperature variability in the South Pacific region

The South Pacific (SP) region exerts large control on the climate of the Southern Hemisphere at many times scales. This paper identifies the main modes of interannual sea surface temperature (SST) variability in the SP which consist of a tropical-driven mode related to a horseshoe structure of posit...

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Autores principales: Saurral, R.I., Doblas-Reyes, F.J., García-Serrano, J.
Formato: JOUR
Materias:
CEOF analysis
ENSO
IPO
South Pacific
Southern Hemisphere warming
air-sea interaction
decadal variation
El Nino-Southern Oscillation
sea level pressure
sea surface temperature
Southern Hemisphere
temperature anomaly
warming
Pacific Ocean
Pacific Ocean (South)
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09307575_v50_n3-4_p1129_Saurral
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09307575_v50_n3-4_p1129_Saurral
record_format dspace
spelling todo:paper_09307575_v50_n3-4_p1129_Saurral2023-10-03T15:48:04Z Observed modes of sea surface temperature variability in the South Pacific region Saurral, R.I. Doblas-Reyes, F.J. García-Serrano, J. CEOF analysis ENSO IPO South Pacific Southern Hemisphere warming air-sea interaction decadal variation El Nino-Southern Oscillation sea level pressure sea surface temperature Southern Hemisphere temperature anomaly warming Pacific Ocean Pacific Ocean (South) The South Pacific (SP) region exerts large control on the climate of the Southern Hemisphere at many times scales. This paper identifies the main modes of interannual sea surface temperature (SST) variability in the SP which consist of a tropical-driven mode related to a horseshoe structure of positive/negative SST anomalies within midlatitudes and highly correlated to ENSO and Interdecadal Pacific Oscillation (IPO) variability, and another mode mostly confined to extratropical latitudes which is characterized by zonal propagation of SST anomalies within the South Pacific Gyre. Both modes are associated with temperature and rainfall anomalies over the continental regions of the Southern Hemisphere. Besides the leading mode which is related to well known warmer/cooler and drier/moister conditions due to its relationship with ENSO and the IPO, an inspection of the extratropical mode indicates that it is associated with distinct patterns of sea level pressure and surface temperature advection. These relationships are used here as plausible and partial explanations to the observed warming trend observed within the Southern Hemisphere during the last decades. © 2017, Springer-Verlag Berlin Heidelberg. Fil:Saurral, R.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09307575_v50_n3-4_p1129_Saurral
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic CEOF analysis
ENSO
IPO
South Pacific
Southern Hemisphere warming
air-sea interaction
decadal variation
El Nino-Southern Oscillation
sea level pressure
sea surface temperature
Southern Hemisphere
temperature anomaly
warming
Pacific Ocean
Pacific Ocean (South)
spellingShingle CEOF analysis
ENSO
IPO
South Pacific
Southern Hemisphere warming
air-sea interaction
decadal variation
El Nino-Southern Oscillation
sea level pressure
sea surface temperature
Southern Hemisphere
temperature anomaly
warming
Pacific Ocean
Pacific Ocean (South)
Saurral, R.I.
Doblas-Reyes, F.J.
García-Serrano, J.
Observed modes of sea surface temperature variability in the South Pacific region
topic_facet CEOF analysis
ENSO
IPO
South Pacific
Southern Hemisphere warming
air-sea interaction
decadal variation
El Nino-Southern Oscillation
sea level pressure
sea surface temperature
Southern Hemisphere
temperature anomaly
warming
Pacific Ocean
Pacific Ocean (South)
description The South Pacific (SP) region exerts large control on the climate of the Southern Hemisphere at many times scales. This paper identifies the main modes of interannual sea surface temperature (SST) variability in the SP which consist of a tropical-driven mode related to a horseshoe structure of positive/negative SST anomalies within midlatitudes and highly correlated to ENSO and Interdecadal Pacific Oscillation (IPO) variability, and another mode mostly confined to extratropical latitudes which is characterized by zonal propagation of SST anomalies within the South Pacific Gyre. Both modes are associated with temperature and rainfall anomalies over the continental regions of the Southern Hemisphere. Besides the leading mode which is related to well known warmer/cooler and drier/moister conditions due to its relationship with ENSO and the IPO, an inspection of the extratropical mode indicates that it is associated with distinct patterns of sea level pressure and surface temperature advection. These relationships are used here as plausible and partial explanations to the observed warming trend observed within the Southern Hemisphere during the last decades. © 2017, Springer-Verlag Berlin Heidelberg.
format JOUR
author Saurral, R.I.
Doblas-Reyes, F.J.
García-Serrano, J.
author_facet Saurral, R.I.
Doblas-Reyes, F.J.
García-Serrano, J.
author_sort Saurral, R.I.
title Observed modes of sea surface temperature variability in the South Pacific region
title_short Observed modes of sea surface temperature variability in the South Pacific region
title_full Observed modes of sea surface temperature variability in the South Pacific region
title_fullStr Observed modes of sea surface temperature variability in the South Pacific region
title_full_unstemmed Observed modes of sea surface temperature variability in the South Pacific region
title_sort observed modes of sea surface temperature variability in the south pacific region
url http://hdl.handle.net/20.500.12110/paper_09307575_v50_n3-4_p1129_Saurral
work_keys_str_mv AT saurralri observedmodesofseasurfacetemperaturevariabilityinthesouthpacificregion
AT doblasreyesfj observedmodesofseasurfacetemperaturevariabilityinthesouthpacificregion
AT garciaserranoj observedmodesofseasurfacetemperaturevariabilityinthesouthpacificregion
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