黑河实验区若干下垫面总辐射、地表反射率与太阳高度角的关系

本文利用1991年“黑河实验”期张掖，化音，沙漠站1月、4月、8月、10月太阳辐射观测资料，分析了晴天总辐射、地表反射率与太阳高度角的关系，得到了不同下垫面、不同季节的地表反射率与太阳高度角的函数关系及各站晴天总辐射与太阳高度角的函数关系的拟合公式，并讨论了这种关系在利用卫星观测资料反演地表反射率中的应用．

RELATIONSHIPS BETWEEN GLOBAL RADIATION, SURFACE ALBEDO AND SOLAR ELEVATION ANGLE FOR SEVERAL UNDERLYING SURFACES IN THE HEIHE EXPERIMENTAL AREA

In this study, the clear-day observational data of solar radiation at Zhangye, Huayin and Desert stations in January, April, August and October during the Heihe exprimental period ( 1991 ) are used to discuss the relationships between clear-day grobal solar radiation, surface albedo and solar elevation angle. The empirical functional relationships between surface albedo and solar elevation angle are obtained for different underlying surfaces and different seasons. The relationship between clear-day grobal solar radiation and solar elevation angle for each station is also given. Finally, the applications of these functional relationships in the retrieval of surface albedo from satellite data are also discussed.