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以Landsat TM影像反照率反演结果和MOD10A1逐日反照率产品为主要数据源,对其反照率遥感资料进行精度验证,然后根据这两种遥感数据资料对木孜塔格冰川表面反照率的时空变化特征进行分析,并探讨了反照率与粉尘的关系.结果表明:从空间上看,冰川表面反照率具有明显的空间变化特征,其数值介于0.508~0.637;总体上反照率随着海拔升高而增大,在海拔5 950m以上,由于有裸岩的存在,反照率开始下降.从年际变化上看,在2000-2009年间木孜塔格冰川反照率年际变化波动较大,并呈微弱的上升趋势,速率约为0.0025a-1.反照率与微粒个数呈现负相关关系.
Landsat TM image albedo inversion results and MOD10A1 daily albedo products were used as the main data sources to verify the accuracy of the albedo data. Based on these two remote sensing data, the spatial and temporal variations of albedo over the Muztag Glacier Characteristics of the glacier and the relation between the albedo and the dust were discussed.The results showed that the albedo of the glacier had obvious spatial variation characteristics from the point of view of space and its value ranged from 0.508 to 0.637. The albedo began to decline due to the presence of bare rocks.In the interannual variation perspective, the annual variation of albedo of Muztag Glacier fluctuated greatly between 2000 and 2009 Weak upward trend, the rate is about 0.0025a-1. Albedo and the number of particles showed a negative correlation.