摘要
利用MODIS卫星反演的积雪资料以及同期气象资料,分析了2000-2005年青藏高原积雪分布特征、年际变化及其与同期气温和降水的关系,结果表明:青藏高原积雪分布极不均匀,四周山区多雪,腹地少雪;高原积雪期主要集中在10月到翌年5月;2000-2005年高原积雪年际变化差异较大,积雪面积总体上呈现冬春季减少、夏秋季增加的趋势;气温和降水是影响高原积雪变化的基本因子.冬季,高原积雪面积变化对降水更为敏感;春季,气温是影响高原积雪面积变化更主要的因素.
A study is presented of the spatial distribution, seasonal and inter-annual variability of snow cover over the Tibetan Plateau from 2000 to 2005, and their relation to corresponding temperature and precipitation. The data used consist of MODIS 8-day snow cover extent chart and the daily temperature and precipitation data from meteorological stations. The distribution of the snow cover over the Tibetan Plateau is far from uniformity. In the peripheral high mountains snow cover distributes extensively and has a long duration, but in the vast interior it is rare or even thin. The dura-tion of snow cover in the Tibetan Plateau is from October to May of the next year. Inter-annual change of snow cover is evident during 2000- 2005. The Plateau snow cover extent slowly increases in summer and autumn, but decreases in winter and spring. Temperature and precipitation are the main factors affecting the change of snow cover in the Tibetan Plateau. In winter, precipita- tion has more significant effect on snow cover extent than temperature does. But in spring, temperature has more important impact on snow cover.
出处
《冰川冻土》
CSCD
北大核心
2007年第6期855-861,共7页
Journal of Glaciology and Geocryology
基金
国家自然科学基金项目(9041100340121101)
中国科学院知识创新工程重要方向项目(KZCX3-SW-344)
中国科学院百人计划项目资助
关键词
青藏高原
积雪
气温
降水
Tibetan Plateau
snow cover
air temperature
precipitation
