海洋科学2016，Vol.40Issue(10)：143-150,8.DOI:10.11759/hykx20151201002
南太平洋副热带偶极子对南太平洋辐合带的影响
Influence of the South Pacific Subtropical Dipole on the South Pacific Convergence Zone
摘要
Abstract
This study analyzes the influence of the South Pacific Subtropical Dipole (SPSD) on the South Pacific Convergence Zone (SPCZ) and explores its dynamic processes by using SST data HadISST from the Hadley center and atmospheric reanalysis NCEP-NCAR data. Analysis shows that the SPSD is linearly independent of ENSO and shows strong phase locking peaks in summer (December January February). The location of the SPCZ precipitation is significantly affected by an SPSD event. The northeast pole (warmer SST) has a positive precipitation anomaly because of lower pressure and moisture convergence in this area during positive dipole event (referred to as positive event) years. However, the southwest pole (cooler SST) with its higher pressure is dominated by a divergence of moisture resulting in less precipitation. Therefore, the SPCZ precipitation zone moves to the north and the location of precipitation is opposite during a negative dipole event (referred to as negative event), which has less precipitation in northeast pole area and more precipitation in southwest pole area. Therefore, the SPCZ precipitation zone moves to the south. The results of this study provide more knowledge on the relationship between SPSD and SPCZ and help to bet-ter understand annual climate change and air–sea interaction in South Pacific.关键词
南太平洋副热带偶极子/南太平洋辐合带/海面温度/降水/大气环流Key words
the South Pacific Subtropical Dipole/the South Pacific Convergence Zone/sea surface temperature/precipitation/circulation分类
天文与地球科学引用本文复制引用
李琼,郑建,王法明..南太平洋副热带偶极子对南太平洋辐合带的影响[J].海洋科学,2016,40(10):143-150,8.基金项目
中国科学院战略性先导科技专项(XDA11010102) （XDA11010102）
国家自然科学基金项目(41176017, 41421005, 41606018) （41176017, 41421005, 41606018）
国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目(U1406401) Strategic Priority Research Program of the Chinese Academy of Sciences, No.XDA11010102 （U1406401）
National Natural Science Foundation of China, No.41176017, No.41421005, No.41606018 （）
NSFC-Shandong Joint Fund for Marine Science Research Centers, Grant No.U1406401 （）
