中文摘要：

采用对照反演比法对比分析了青藏高原地区相同时空条件下的MODIS反照率当量反演结果和全反演结果的差异。利用2002—2004年青藏高原地区Terra MODIS数据开展的对照反演试验表明：（1）黑空反射率BSA两种反演结果的绝对偏差小于0.03,白空反射率WSA两种反演结果的绝对偏差约为0.04;BSA两种反演结果绝对偏差的标准差约为0.05,而WSA的则更大。（2）BSA两种反演结果和WSA两种反演结果的绝对偏差及其标准差均存在一定的年际差异。（3）可见光区反照率两种反演结果的绝对偏差及其标准差一般大于红外光区两种反演结果的绝对偏差及其标准差。（4）两种地表反照率反演结果的绝对偏差及其标准差在青藏高原地区三种主要地表类型的差异不大。

英文摘要：

A novel method named as the simulation-comparison was applied to examine the difference between albedos derived with the full inversion and those derived with the magnitude inversion under completely the same temporal-spatial scales.Study with Terra MODIS data during 2002-2004over the Qinghai-Xizang Plateau revealed that：（1）The absolute biases for WSA（the white sky albedo）and BSA（the black sky albedo）were around 0.04and a little less than 0.03,respectively;the standard errors of the absolute biases for BSA and WSA were both above 0.05,and those for WSA were larger than those for BSA.（2）There existed annual discrepancy for both the absolute biases and their standard errors between these two different kinds of albedos.（3）Both the absolute biases and the corresponding standard errors in the visible bands were generally larger than those in the infrared bands.（4）There was no distinct discrepancy among the absolute biases and the standard errors among three main kinds of land-cover type over the Qinghai-Xizang Plateau.