江西地区冬季气温异常与北半球500hPa高度场的关系  

RELATIONSHIP BETWEEN THE WINTER TEMPERATURE ANOMALY IN JIANGXI AND THE 500 HPA GEOPOTENTIAL HEIGHT FIELD OVER NORTHERN HEMISPHERE

作　　者：马锋敏[1] 黄彩婷[1] 张传江[1] 唐传师 

机构地区：[1]江西省气候中心,江西南昌330046 [2]南昌市气象局,江西南昌330038

出　　处：《气象与减灾研究》2013年第1期32-38,共7页Meteorology and Disaster Reduction Research

基　　金：江西省科技支撑计划项目(编号:2008BB30700);江西省气象局2010年创新基金项目"江西省冬季异常气候分型及预测研究"

摘　　要：利用1960—2011年江西省81个台站月平均气温观测资料和NCEP/NCAR北半球逐月500 hPa高度场再分析资料,分析了江西地区冬季(当年12月至次年2月)气温异常的时空特征、冷暖典型年500 hPa高度距平场特征以及气温异常与北半球500 hPa高度场的相关性,并运用奇异值分解(SVD)方法探讨了北半球500 hPa高度场异常与江西地区冬季气温异常之间的耦合关系。结果表明:(1)江西地区省冬季气温以全区一致的变化为主;(2)影响江西地区冬季气温异常的500 hPa高度场关键区为北大西洋(20.0°—42.5°N,10°—70°W)和欧亚地区(25.0°—72.5°N,40°—150°E),影响时段分别为当年7月(前期)和当年冬季(同期);(3)前期7月北大西洋关键区500 hPa高度场与江西地区冬季气温呈显著的正相关关系,其中最显著的区域为赣北地区;冬季欧亚大陆关键区500 hPa高度场与江西地区冬季气温也呈显著的相关关系,其中最显著的区域为赣北、赣中地区。Using conventional observation data and NCEP/NCAR reanalysis data,the spatial and temporal distributions of winter（DJF） temperature anomaly of Jiangxi and their relationship with 500 hPa geopotential height over Northern Hemisphere are analyzed.The coupling relationship between the anomalous distribution in winter air temperature and the variations of 500 hPa geopotential height over Northern Hemisphere is studied with the Singular Value Decomposition（SVD） analysis.The main results are as follows：（1） the winter temperature in Jiangxi changes in high uniformity;（2） the key areas of 500 hPa geopotential height are Eurasia area（25°-72.5°N,40°-150°E） and North Atlantic Ocean area（20°-42.5°N,10°-70°W）,July and winter of the same year are the influencing periods respectively;（3） there is remarkable positive correlation between the 500 hPa geopotential height over the North Atlantic Ocean key areas and winter temperature in Jiangxi,with the most remarkable region in northern Jiangxi.And the 500 hPa geopotential height over Eurasia key area also significantly related to the winter temperature in Jiangxi,with the most remarkable regions in northern and central Jiangxi.

关 键 词：冬季气温 500hPa高度场 SVD方法 

分 类 号：P434[天文地球—大气科学及气象学]