Remote forcing of Indian Ocean warming on Northwest Pacific during El Nio decaying years:a FOAM model approach  

作　　者：胡海波 洪晓媛 张媛 杨修群 刘伟 卢华国 杨建玲 

机构地区：[1]School of Atmospheric Sciences,Nanjing University [2]Key Laboratory of Ocean Circulation and Waves,Institute of Oceanology,Chinese Academy of Sciences [3]University of Chinese Academy of Sciences [4]School of Marine Sciences,Nanjing University of Information Science and Technology [5]Scripps Institution of Oceanography,University of California [6]School of Languages and Cultures,Nanjing University of Information Science and Technology [7]Key Laboratory of Meteorological Disaster Preventing and Reducing in Ningxia,Ningxia Meteorological Bureau

出　　处：《Chinese Journal of Oceanology and Limnology》2013年第6期1363-1371,共9页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Basic Research Program of China(973 Program)(Nos.2010CB428504,2012CB956002);the National Natural Science Foundation of China(Nos.40906005,41105059,41065005,GYHY201106017,GYHY201306027);the National Key Technology Research and Development Program(No.2009BAC51B01)

摘　　要：This paper attempts to analyze in detail the remote influence of the Indian Ocean Basin warming on the Northwest Pacific （NWP） during the year of decaying E1 Nifio. Observation data and the Fast Ocean- Atmosphere coupled Model 1.5 were used to investigate the triggering conditions under which the remote influence is formed between the positive sea surface temperature （SST） anomaly in the North Indian Ocean and the Anomalous Northwest Pacific anticyclone （ANWPA）. Our research show that it is only when there is a contributory background wind field over the Indian Ocean, i,e., when the Indian Summer Monsoon （ISM） reaches its peak, that the warmer SST anomaly in the North Indian Ocean incites significant easterly wind anomalies in the lower atmosphere of the Indo-West tropical Pacific. This then produces the remote influence on the ANWPA. Therefore, the SST anomaly in the North Indian Ocean might interfere with the prediction of the East Asia Summer Monsoon in the year of decaying E1 Nifio. Both the sustaining effect of local negative SST anomalies in the NWP, and the remote effect of positive SST anomalies in the North Indian Ocean on the ANWPA, should be considered in further research.This paper attempts to analyze in detail the remote influence of the Indian Ocean Basin warming on the Northwest Pacific(NWP) during the year of decaying El Ni o.Observation data and the Fast Ocean- Atmosphere coupled Model 1.5 were used to investigate the triggering conditions under which the remote influence is formed between the positive sea surface temperature(SST) anomaly in the North Indian Ocean and the Anomalous Northwest Pacific anticyclone(ANWPA).Our research show that it is only when there is a contributory background wind field over the Indian Ocean,i.e.,when the Indian Summer Monsoon(ISM) reaches its peak,that the warmer SST anomaly in the North Indian Ocean incites significant easterly wind anomalies in the lower atmosphere of the Indo-West tropical Pacific.This then produces the remote influence on the ANWPA.Therefore,the SST anomaly in the North Indian Ocean might interfere with the prediction of the East Asia Summer Monsoon in the year of decaying El Ni o.Both the sustaining effect of local negative SST anomalies in the NWP,and the remote effect of positive SST anomalies in the North Indian Ocean on the ANWPA,should be considered in further research.

关 键 词：E1Nno decaying year Indian Ocean Basin warming （lOB warming） Indian Summer Monsoon （ISM） Fast Ocean-Amaosphere Model 1.5 （FOAM1.5） anomalous Northwest Pacific （NWP） anticyclone 

分 类 号：P732[天文地球—海洋科学]