中国地－气系统短波吸收辐射分布特征

ATMOSPHERE- EARTH ABSORBED SHORTWAVE RADIATION DISTREBUTION FEATURES OVER CHINA

根据ＥＲＢＥ和ＩＳＣＣＰ资料讨论了公气系统短波吸收辐射及其年较差在全国的分布，分析了其与总云量、行星和地表反射卒以及地面吸收辐射的相互关系。发现在冬季地－气系统短波吸收辐射分布主要呈南高北低型，夏季分布形势为一不对称的大鞍形场，大致与行星反射率分布反向对应。公气短波吸收辐射与总云量呈负相关，高相关区在我国东部。各站地－气短波吸收辐射与地面吸收辐射的相关系数普遍高达０．９００以上。此一特，或为从气候上利用地－气吸收辐射反演地面吸收辐射提供初步可能。

Based on ERBE and ISCCP data the annual contrast pattern of absorbed shortwaveradiation(ASWR)in the atmosphere- earth system over China is explored in connection withanalysis of its relation to total cloudiness,planetary/surface albedoes,and surface ASWR,It isfound that the winter(summer)ASWR takes a forrn of being higher in value in the south thanin the north(being asymmetric saddle),roughly in an opposite correspondence to the planetaryalbedo distribution. Besides,the atmosphere-earth ASWR is negatively correlated to totalcloudiness,with higher correlation in the eastern part and the correlation in excess of 0.900between the two types of ASWR for all the stations under study,a result that makes it possible,to some extent,to obtain the surface ASWR from the air-earth analog through retrival in aclimatological context.