Through the collection of snow cover product MOD10 A2 from 2002 to 2012 ,we have found the temporal and spatial variation characteristics of snow cover area in Tibet,which is covered by high snow cover in recent 10 years. It is obtained by means of monthly maximum synthesis. The results show that there are obvious periods of snow and snowmelt during the change of the seasons with the change of the seasons. In interannual variation,there is a characteristic of bimodal fluctuation on the whole,but the fluctuation range is small. The spatial distribution of snow cover in Tibet is obviously affected by geographical influence. The high snow - covered area is mainly distributed in most areas of Nyingchi,including Tibet,eastern part of Nagqu County,west of Qamdo,northern part of the province and southern edge of Shigatse. The low snow zone is distributed in central Tibet.%通过收集2002-2012年的雪盖产品MOD10 A2,采用月最大值合成的方式,获取了10年来西藏这一高积雪覆盖区域积雪面积时空变化特征.结果表明:在年内变化上,积雪随着季节更替有明显的变化,存在有积雪和融雪两个时期;在年际变化上,在总体上呈现双峰波动的特征,但是波动幅度不大.西藏积雪的空间分布受地域影响差异明显,高积雪区主要分布在西藏林芝的大部分地区、那曲县东部、昌都西部以及噶尔县北部、日喀则南部边缘等地,低积雪区则分布在西藏中部.
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