基于广义平衡反馈方法的2009／2010年中国冬季气温异常型的诊断  

A DIAGNOSTIC ANALYSIS OF AIR TEMPERATURE ANOMALY MODE OVER CHINA IN 2009/2010 WINTER BASED ON GENERALIZED EQUILIBRIUM FEEDBACK ASSESSMENT(GEFA) METHOD

作　　者：江志红[1] 吴燕珠[1] 刘征宇[1,2] 温娜[1] 

机构地区：[1]南京信息工程大学气象灾害省部共建教育部重点实验室,江苏南京210044 [2]Center for Climatic Research & Department Atmosphere & Oceanic Science, University of Wisconsin-Madison, 美国

出　　处：《热带气象学报》2013年第1期28-36,共9页Journal of Tropical Meteorology

基　　金：公益性行业(气象)科研专项(GYHY200906016);国家重点基础研究发展计划项目(2010CB950401)共同资助

摘　　要：利用中国160个台站和NCEP再分析资料,引入综合分析气候反馈的统计方法——广义平衡反馈方法(GEFA),结合EOF、相关合成分析,探讨2009/2010年中国冬季气温异常型的成因。结果表明:2009/2010年中国冬季气温出现的东北冷西南暖分布型与同期海温异常及其相联系的大气环流异常有密切的关系。其中赤道中东太平洋海温异常的El Ni o型和赤道大西洋海温异常"正-负-正"三极型模态对2009/2010年中国冬季气温东北冷西南暖分布型有显著的强迫作用。上述海温异常型影响了大气环流异常,中高纬度地面偏北气流将冷空气输送到华北东北地区,致使该地区冬季气温偏低,同时中纬度西风增强,极地冷空气被迫盘踞在高纬,不能影响到西南地区,导致西南地区较常年更暖。By using the observed monthly mean data over 160 stations of China and NCAR/NCEP reanalysis data, the generalized equilibrium feedback assessment（GEFA） method, combined with the methods of EOF analysis, correlation and composite analysis, is used to explore the influence of different SST modes on the cold-northeast/warm-southwest pattern（CNE-WSN）. The results show that the 2009/2010 winter air temperature oscillation mode between northern and southern parts of China is closely related to the corresponding sea surface temperature anomalies（SSTA） and its associated atmospheric circulation anomalies The above-mentioned air temperature mode, exhibiting a warming in Northeast China and a cooling in Southwest China, is significantly forced by the E1 Nifio mode and the North Atlantic SSTA mode, which have three poles. Under the influence of SSTA modes, the surface northerly flow transported cold air to north and northeast China, resulting in low temperatures in the region. Meanwhile, the mid-latitude westerlies are intensified and the polar cold air are entrenched in high latitudes and cannot affect the Southwest, resulting in the warming of the Southwest.

关 键 词：广义平衡反馈方法 海温异常 大气环流 

分 类 号：P466[天文地球—大气科学及气象学]