中文摘要：

为了促进MODIS地表反照率产品的应用及其反演算法的改进,应用MODIS地表反照率反演质量数据MCD43B2,并结合数字海拔高程模型DEM（Digital Elevation Model）数据和MODIS地表覆盖类型数据MOD12Q1,统计分析了2003-2013年青藏高原MODIS地表反照率不同反演结果的空间分布情况,结果表明：（1）MODIS地表反照率全反演结果主要分布在中西部和北部,春季全反演结果的概率超过80%,夏季向西北收缩且概率降低,秋季高概率全反演结果的范围最大、冬季最小。（2）冬季高概率当量反演结果主要分布在青藏高原西北、东南两翼,其他季节主要分布在昌都、那曲、林芝、山南地区和拉萨市。（3）在山南地区中东部、林芝及其与昌都地区交界处构成的＂入＂字形区域,四季无反演结果的概率都比较高,最高可达100%。（4）全反演结果的概率随海拔的增加呈下降趋势,当量反演结果则相反,无反演结果的概率在各海拔区间都较恒定且不超过10%。（5）在三种主要地表类型中,开放灌木区和裸土稀疏植被区全反演结果的概率高于草地,约为70%;草地当量反演结果的概率最高,约为30%;三者无反演结果的概率大致相当,均不足10%。以上结果表明青藏高原地区MODIS地表反照率反演质量的空间分布具有较为明显的地域特征,并且与海拔和地表覆盖类型存在一定的联系。

英文摘要：

In order to promote the application of MODIS（ MODerate Imaging Spectra-radiometer） land surface albedo（ LSA） and the improvement of its retrieval algorithm,the spatial distribution of MODIS retrievals over the Qinghai-Xizang Plateau（ QXP） for different kind of retrieval quality with the MODIS LSA retrieval quality product MCD43B2 from 2003 to 2013 were statistically analyzed,as well as the digital elevation model（ DEM）and the MODIS land surface cover classification product MOD12Q1. The results are as following ：（ 1） The MODIS LSA full inversions（ FI） are mainly located on the central and west regions,and the north regions of the QXP. The probability of FI over these regions is above 80% in spring. In summer,not only the area with high probability of FI shrinks to the north-west of the QXP,but also the probability decreases. The area with high probability of FI in autumn is the largest,while the smallest in winter.（ 2） Main areas with high probability of MODIS LSA magnitude inversions（ MI） are distributed over the north-west and the south-east of the QXP in winter,while over Changdu Prefecture,Nagqu Prefecture,Nyingchi Prefecture,Shannan Prefecture and Lhasa City in the other three seasons.（ 3） The probability of no inversions（ NI） for MODIS LSA is the highest over the Chinese character ＂into ＂-shaped area,which is formed in the central and east of Shannan Prefecture,Nyingchi Prefecture and its adjacent area of Changdu Prefecture. Moreover,the probability over this area is high over the four seasons and the highest is close to 100%.（ 4） The general trend for the probability of FI is decreasing as the increase of the elevation,while it is opposite for that of MI. The probability of NI is relatively stable and no more than 10% in each elevation range.（ 5） Among three main kinds of land cover type over the QXP,the probabilities of FI over the open shrubs and the naked（ sparse vegetated） are around 70% and higher than that over the grassland. Accordingly,the pr