Distinctive Precursory Air–Sea Signals between Regular and Super El Ni os

作     者：Lin CHEN Tim LI Swadhin K.BEHERA Takeshi DOI 

作者机构：Key Laboratory of Meteorological Disaster Joint International Research Laboratory of Climate and Environmental Changeand Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and Technology International Pacific Research Center School of Ocean and Earth Science and Technology University of Hawaii Application Laboratory Japan Agency for Marine-Earth Science and Technology 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2016年第33卷第8期

页      面：996-1004页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 080402[工学-测试计量技术及仪器] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 

基　　金：jointly supported by the China National 973 Project(Grant No.2015CB453200) a Jiangsu Province project(Grant No.BK20150062) the NSFC(Grant Nos.41475084 41376002 and 41530426) the ONR(Grant No.N00014-16-12260) the International Pacific Research Center sponsored by JAMSTEC 

主　　题：super El Ni no precursory air–sea signals thermocline depth anomaly ENSO 

摘      要：Statistically different precursory air–sea signals between a super and a regular El Ni no group are investigated, using observed SST and rainfall data, and oceanic and atmospheric reanalysis data. The El Ni no events during 1958–2008 are first separated into two groups： a super El Ni no group（S-group） and a regular El Ni no group（R-group）. Composite analysis shows that a significantly larger SST anomaly（SSTA） tendency appears in S-group than in R-group during the onset phase[April–May（0）], when the positive SSTA is very small. A mixed-layer heat budget analysis indicates that the tendency difference arises primarily from the difference in zonal advective feedback and the associated zonal current anomaly（u）.This is attributed to the difference in the thermocline depth anomaly（D） over the off-equatorial western Pacific prior to the onset phase, as revealed by three ocean assimilation products. Such a difference in D is caused by the difference in the wind stress curl anomaly in situ, which is mainly regulated by the anomalous SST and precipitation over the Maritime Continent and equatorial Pacific.