中国云气候特征的分析  

CLOUD CLIMATOLOGY CHARACTERISTICS OF CHINA FROM ISCCP DATA

作　　者：刘瑞霞[1] 刘玉洁[1] 杜秉玉[2] 

机构地区：[1]国家卫星气象中心,北京100081 [2]南京气象学院,南京210044

出　　处：《应用气象学报》2004年第4期468-476,共9页Journal of Applied Meteorological Science

基　　金：国家重点基础研究项目"我国重大气候灾害的形成机理和预测理论研究"基金支持

摘　　要：利用 1 983年 7月至 2 0 0 1年 8月的ISCCP卫星总云量资料 ,分析了我国总云量的空间分布特征 ,并将全国用 1 93个网格点表示 ,采用聚类分析方法 ,按照总云量年内变化规律相同的原则将中国分为 3个区 ,逐区讨论了总云量的年内变化特征 ;同时 ,分析了 1 8年来中国总云量的变化趋势。最后利用奇异值分解法 (SVD)找到了我国青藏高原冬季总云量与全国夏季降水的高相关区 。Based on the cloud amount of ISCCP D2, the spatial distribution characters and the temporal variation of cloud amount over 3 regions of China were analyzed using system cluster analysis method. The variation trend of cloud over China was discussed. It concludes that in north east of China the cloud amount increases and decreases in the west of China and in the north of China. The singular value decomposition (SVD) modes based on two fields between winter total cloud amount over Tibetan Plateau and summer precipitation in China were computed and a credibility of teleconnection was analyzed by SVD. The result shows that the correlation between winter total cloud amount over Tibetan Plateau and the summer precipitation in the parts of north and northeast China is obvious.

关 键 词：云气候 卫星总云量 时空分布 聚类分析 奇异值分解法 

分 类 号：P426.5[天文地球—大气科学及气象学]