文献类型：期刊文献

英文题名：Recent weakening relationship between the springtime Indo-Pacific warm pool SST zonal gradient and the subsequent summertime western Pacific subtropical high

作者：Gan, Qiuying[1,2];Wang, Lei[1];Leung, Jeremy Cheuk-Hin[2];Weng, Jinwen[1];Zhang, Banglin[2]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[2]China Meteorol Adm, Guangdong Prov Key Lab Reg Numer Weather Predict, Guangzhou Inst Trop & Marine Meteorol, Guangzhou, Peoples R China

年份：2022

卷号：42

期号：16

起止页码：10173

外文期刊名：INTERNATIONAL JOURNAL OF CLIMATOLOGY

收录：SCI-EXPANDED(收录号：WOS:000877934500001)、、EI(收录号：20224513089708)、Scopus(收录号：2-s2.0-85141431578)、WOS

基金：National Key Research and Development Program of China, Grant/Award Number: 2018YFC1506903; National Natural Science Foundation of China, Grant/Award Number: 41776031; Program for Scientific Research Start-up Funds of Guangdong Ocean University, Grant/Award Number: R17051; Team Project Funding of Scientific Research Innovation for Universities in Guangdong Province, Grant/Award Number: 2019KCXTF021

语种：英文

外文关键词：decadal change; ENSO regime shift; Indo-Pacific warm pool; tropical Atlantic SST; western Pacific subtropical high; SST zonal gradient

外文摘要：The western Pacific subtropical high (WPSH) substantially affects the climate in the Pacific and East Asia. Previous studies have revealed that the springtime Indo-Pacific warm pool (IPWP) sea surface temperature zonal gradient (SSTG) could be used as a predictor of the subsequent summertime WPSH's intensity. Here, we find that the interannual variability of the springtime IPWP SSTG has greatly decreased after the late 1990s, accompanied by the weakened relationship between the springtime IPWP SSTG and the following summertime WPSH, which may reduce the efficiency of the springtime IPWP SSTG as a key predictor for the summertime WPSH in recent decades. This observed recent weakening IPWP SSTG-WPSH relationship could be largely contributed by the decadal shift of the El Nifio-Southern Oscillation (ENSO) and the WPSH around the late 1990s. The ENSO regime shift from the eastern Pacific (EP) type to the central Pacific (CP) type could alter the spatial pattern of the springtime IPWP sea surface temperature (SST) dipole and further weaken the local air-sea interaction between the underlying IPWP SST and the WPSH. From another perspective of the WPSH decadal shift, the WPSH-related first leading mode before (after) the late 1990s, characterized by a large-scale uniform (dipole) pattern with an oscillating period of similar to 4-5 year (similar to 2-3 year), tended to promote a stronger (weaker) linkage with the springtime IPWP SSTG. In addition, the recent enhancement of the tropical Atlantic SST influences is considered to possibly promote the decadal shifts of the ENSO and the WPSH-related leading mode. After the springtime tropical Atlantic SST was added as a predictor, the predicting skills of the empirical equation for the summertime WPSH could be substantially improved. The results herein have important implications for the further improvement of the seasonal WPSH prediction, which is of great practical significance in the prevention and mitigation of climate disasters.