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

被引：0
作者：
Ramiro I. Saurral
Francisco J. Doblas-Reyes
Javier García-Serrano
机构：
[1] Centro de Investigaciones del Mar y la Atmósfera (CIMA; UBA-CONICET),Departamento de Ciencias de la Atmósfera y los Océanos (DCAO; FCEN, UBA)
[2] UMI-IFAECI/CNRS,undefined
[3] Barcelona Supercomputing Center (BSC),undefined
[4] Institució Catalana de Recerca i Estudis Avançats (ICREA),undefined
来源：
Climate Dynamics | 2018年 / 50卷
关键词：
South Pacific; Southern Hemisphere warming; IPO; ENSO; CEOF analysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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.
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页码：1129 / 1143
页数：14
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