西北典型地域云对地气系统的辐射强迫研究  

Comparison of cloud radiative forcing on the atmosphere-earth system over northwestern China with respect to typical geo-topographic regions

作　　者：陈勇航[1] 白鸿涛[1] 黄建平[2] 邱学兴 亢燕铭[1] 管晓丹[2] 毛晓琴[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]兰州大学大气科学学院,甘肃兰州730000 [3]安徽省气象台,安徽合肥230061

出　　处：《中国环境科学》2008年第2期97-101,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(40633017,40575036);国家“973”项目(2006CB403700)

摘　　要：采用NASA地球观测系统(EOS)"云与地球辐射能量系统(CERES)"的云和辐射资料,研究了我国西北地区4个典型地域2002年7月至2004年6月云对地气系统辐射强迫的季节及年变化特征,探讨了云特性参量对云辐射强迫的影响.结果表明,云的辐射强迫具有显著的季节变化和地域变化.一般夏季云净辐射强迫最大,冬季最小,而塔克拉玛干沙漠最小值出现在秋季,夏季的季风影响区和塔克拉玛干沙漠区的云净辐射强迫相差达129W/m2.云的短波辐射、长波辐射和净辐射年平均效应均在季风区最强,分别达-171.2,48.9,-122.3W/m2;在塔克拉玛干沙漠地区最弱,分别为-54.7,37.3,-17.4W/m2.The seasonal and annual variability of cloud radiative forcing over northwestern China from July 2002 to June 2004 was examined with respect to four geo-topographic regions using SSF Aqua MODIS Edition 1B data of Clouds and the Earth＇s Radiant Energy System （CERES） of NASA＇s EOS. The influences of cloud properties on the radiative forcing were also discussed. The regional variation in cloud radiative forcing was significant as well as seasonal variation. In general, the measurements of cloud radiative forcing were the highest in summer and lowest in winter, however, the Taklimakan Desert had the lowest measurement in autumn. The difference of net radiative forcing between the monsoon influence region and Taklimakan Desert was 129 W/m^2 occuring in summer. The highest measurements of yearly mean of shortwave, long wave and net cloud radiative forcing were all observed over the monsoon influence region, which were -171.2,48.9,-122.3W/m^2. The lowest measurements of that were over the Taklimakan Desert which were -54.7,37.3,-17.4W/m^2.

关 键 词：云辐射强迫 季节变化 年变化 季风影响区 天山山区 祁连山区 塔克拉玛干沙漠 

分 类 号：X16[环境科学与工程—环境科学]