巴丹吉林沙漠不同下垫面辐射特征和地表能量收支分析  

Analyses on Radiation Balance and Surface Energy Budget in the Badain Jaran Desert in Summer

作　　者：马迪[1,2] 吕世华[1] 奥银焕[1] 赵林[1,2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,中国科学院寒旱区陆面过程与气候变化重点实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《高原气象》2012年第3期615-621,共7页Plateau Meteorology

基　　金：国家自然科学基金项目(40975007),国家自然科学基金项目(41005011)共同资助;国家重点基础研究发展计划(973计划)(2009CB421402);全球变化研究重大科学研究计划项目(2010CB950503)

摘　　要：利用2009年夏季在内蒙古自治区阿拉善右旗境内巴丹吉林沙漠开展的"巴丹吉林沙漠陆-气相互作用观测试验"所取得的资料,对比分析了典型晴天条件下,巴丹吉林沙漠两种不同下垫面的辐射平衡特征和地表能量收支的日变化规律。结果表明,不同下垫面地表反射率具有明显的差异,沙漠反射率为0.33,湖区沙生芦苇反射率为0.23,沙漠反射率大于沙生芦苇反射率。巴丹吉林沙漠两种典型下垫面上,各辐射分量均具有相似的日变化特征,即白天大、夜间小。两种下垫面上的净辐射日变化与峰值基本相同,日积分值均约为8MJ.m-2。由于下垫面性质不同,地表能量的分配也不相同。沙漠主要以感热通量为主,地表热流量其次,潜热通量很小可以忽略不计;湖区以潜热通量为主,感热通量和地表热流量次之。Using the data from ＇The Badain Jaran Desert Land-Air Interaction Field Experiment＇, the characteristics of radiation flux and energy budget component in two dif{erent underlying surfaces （i. e. , desert and the growing reed＇s desert） were analyzed. The results show that the albedo in the desert is big- ger than that in the growing reed＇s desert. The desert albedo is 0.33, while the albedo in the growing reed＇s desert is 0.23. The energy budget components vary in different underlying surface conditions. Dur- ing the daytime, the radiation components increase with the increase of solar elevation angle. During the nighttime, the radiation components change fairly small. The net radiation fluxes of different underlying surfaces are closely. In the desert, the sensible heat flux is the biggest, and the surface heat flux is the second, the latent heat flux is fairly small. In the growing reed＇s desert, the latent heat is dominant, the sensible heat flux and the surface heat flux both have the same smaller magnitude.

关 键 词：巴丹吉林沙漠 辐射平衡各分量 地表能量收支 反射率 地表热流量 

分 类 号：P412.1[天文地球—大气科学及气象学]