江淮梅雨期最低气温的气候特征分析  

ANALYSIS OF CLIMATE FEATURES OF CHANGJIANG-HUAIHE AREA'S MINIMUM TEMPERATURE IN MEIYU PERIOD

作　　者：李如琦[1] 王谦谦[1] 

机构地区：[1]南京信息工程大学大气科学系

出　　处：《气象科学》2006年第2期164-170,共7页Journal of the Meteorological Sciences

基　　金：国家自然科学基金项目(编号:40233037和40175021)共同资助

摘　　要：利用江淮地区70个测站1961-2001年历年6月第2侯至7月第2侯最低气温资料，采用旋转经验正交展开（REOF）方法对江淮地区梅雨期最低气温场进行客观分区，并分析了各区域最低气温的长期演变趋势。结果表明：江淮地区梅雨期最低气温场可分为3个区域，各区域的最低气温均具有明显的年际、年代际变化特征，且存在着显著差异，其中东北区明显上升，而南方区和西北区呈降低趋势；各区域存在明显不同的年际、年代际方差构成、突变特征和多尺度振荡周期。Using minimum temperature data from the second pentad in June to the second pentad in July at 70 observational stations from 1961 to 2001, the Changjiang-Huaihe area＇s minimum temperature field in Meiyu period is divided objectively into 3 regions by rotated empirical orthogonal funetion（REOF） method. Based on this,the long-term trend of each region minimum temperature in Meiyu period is analyzed. Results indicate that the minimum temperature field in 3 regions has distinct characteristics of interdeeadal change in the recent 41 years,and there is obvious area difference： the long-term trend of minimum temperature went up markedly in northeast area,descended in south area and northwest area. The interannual（interdecadal） variance contribution ,catastrophe feature and variation period in 3 regions exhibit remarkable diversity.

关 键 词：旋转经验正交展开 江淮地区 梅雨期 最低气温 长期演变趋势 

分 类 号：P423[天文地球—大气科学及气象学]