中国云气候特征的分析

利用1983年7月至2001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193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18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, 证明青藏高原总云量与我国东北降水正相关密切。

Cloud Climatology Characteristics of China from ISCCP Data

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.