中国地区云对地气系统长波射出辐射(OLR)强迫的气候研究

CLIMATOLOGICAL STUDY OF CLOUDS EFFECT ON THE EARTH-ATMOSPHERE SYSTEM OUTGOING LONGWAVE RADIATIVE FORCING IN CHINA

本文利用地球辐射平衡试验（ＥＲＢＥ）和国际卫星云气候计划 （ＩＳＣＣＰ）提供的地气系统长波射出辐射（ＯＬＲ）和云量资料，计算并讨论了我国各 季和年平均云量对地气系统ＯＬＲ的强迫及其所产生的温室效应。结果表明：我国 各季的 ＯＬＲ云强迫与总云量、高云量都有较好的相关，且季节变化明显；ＯＬＲ云 强迫和云温室效应的地理分布受云量和云状的影响较大，它们的年变化一般呈弱 双峰型，峰值在春、夏季出现。

Based on the data of the earth-atmosphere system outgoing longwave radia- tion (OLR) and cloud amount provided by ERBE and ISCCP,the seasonal and annual aver- aged outgoing longwave cloud-atmosphere system in China are investigated. Results show that an obvious correlation exists between the total and high cloudcover and the LWCRF,re- spectively, which has obvious seasonal variations. The geographical distribution of the LWCRF and the clouds greenhouse effect are more affected by cloudcover and cloud types. In general,the annual variation of LWCRF show weak double peak forms,whose peak values are in spring and summer.