热带太平洋SST异常对IAP-9LAGCM年际变率影响的模拟  

THE SIMULATION OF IMPACT ON CLIMATE INTERANNUAL VARIABILITY DUE TO SST VARIATION IN THE TROPICS

作　　者：薛洪斌[1] 张铭[2] 王业桂[1] 

机构地区：[1]总参气象水文中心,北京100081 [2]解放军理工大学气象学院,南京211101

出　　处：《气象科学》2006年第1期58-65,共8页Journal of the Meteorological Sciences

基　　金：国家自然基础研究发展规划项目(编号:40233027)资助

摘　　要：通过1960~1989年实测的热带太平洋(30.5°N^30.5°S,120°E^70°W)SST(热带太平洋区域以外用气候平均值)强迫AGCM得到的结果,以此来研究热带SST的变化对全球大气环流年际变化的影响。首先,我们分析了南方涛动,分别给出了Tahiti和Darwin海平面气压异常及赤道附近(-5°S^5°N)外逸长波辐射(OLR)时间演变,都能很好与观测相比较。然后,讨论了全球大气环流对热带SST的变化的响应,全球主要的遥相关型都能很好地再现。最后,通过奇异值分解(SVD)技术研究了热带SST与冬季北半球500 hPa位势高度主要的耦合型,模拟的相关型与NCEP再分析资料的相关型非常相似。The climate interannual variability is examined using the IAP-9L AGCM. The model is forced by the observed tropical Pacific sea surface temperature for the period 1960-89. Firstly, The variability of Southern Oscillation is studied. The simulated sea level pressure anomalies at both Tahiti and Darwin and outgoing longwave radiation in the tropics are realistically compared to observations. Secondly, global impact of SST variation in the tropics is studied, and main global teleconnection patterns is well showed. Finally, a singular value decomposition analysis performed with the tropical Pacific sea surface temperature and Northern Hemisphere 500 hPa geopotential height shows that the model＇s teleconnection between the Tropics and high latitudes is similar to that of the NCEP reanalysis data.

关 键 词：大气环流模式 年际变率 奇异值分解 

分 类 号：P463.1[天文地球—大气科学及气象学]