1998年夏季青藏高原辐射平衡分量特征  

The Characteristics of Radiation Balance Components of the Tibetan Plateau in the Summer of 1998

作　　者：卞林根[1] 陆龙骅[1] 逯昌贵[1] 陈彦杰[1] 高志球[1] 刘辉志[2] 张宏升[3] 陈家宜[3] 

机构地区：[1]中国气象科学研究院,北京100081 [2]中国科学院大气物理研究所,北京100029 [3]北京大学地球物理系,北京100871

出　　处：《大气科学》2001年第5期577-588,共12页Chinese Journal of Atmospheric Sciences

基　　金：国家攀登-B项目; 中国气象科学研究院跨世纪人材项目共同资助

摘　　要：利用1998年夏季第二次青藏高原气象科学试验（TIPEX）获得的改则、当雄和昌都三个热源观测站的数据和相关资料，统计和分析了高原夏季辐射平衡分量和热源强度的变化特征。结果表明高原地面总辐射平均强度以西部最强，中部次之，东部最小。6月中旬后随着雨季到来，地表反射率均有所降低，中部和东部的辐射强度明显减弱，西部雨季降水和云量都比较少，辐射强度变化不明显。高原中部和东部的净辐射在6月中旬有明显的突变现象，西部突变期出现在7月上旬．以中部的辐射加热强度最大，东部次之，西部最小。湿期随着地面长波辐射的减少，热源强度明显增大。Based on the second Tibetan Plateau Meteorological Experiment (TIPEX) radiation data of Gerze, Damxung and Qamdo as well as related data, the characteristics of radiation balance compo- nents and heat source intensity for summer time, 1998 are presented in this paper. The result shows that the global radiation intensity of surface in the western plateau is stronger than that in the middle and eastern plateau. The surface albedo and radiation intensity are obviously reduced in June at monsoon onset with rain season coming. Meanwhile they are little changed in the western part where there are smaller clouds and rainfall. The variation of effective radiation has a same pattern as global radiation. The radiation budget in the middle and eastern plateau have a remarkable ' Jump' change in June and the jump does not occur in the western part until earlier July. The larger radiation budget appears in the middle and eastern Plateau, and the smaller in the western In the wet period, the surface long--wave ra- diation becomes weak and the surface heat source to the atmosphere is significantly enhanced.

关 键 词：青藏高原 总辐射 反射率 长波辐射 热源强度 土壤热通量 

分 类 号：P422[天文地球—大气科学及气象学]