摘要
对青藏高原１９７８～１９８７年ＳＭＭＲ微波候积雪深度资料、５５个地面基本气象台站１９６３～１９９２年逐日积雪深度记录进行了ＥＯＦ分析．结果表明，青藏高原积雪空间分布极不均匀，四周多雪，特别是东西两侧多雪与广大腹地少雪形成鲜明对比．高原东部是高原积雪年际变化最显著的地区，它主导了整个高原积雪的年际变化，并且与西部多雪区年际波动呈反位相关系．
The snow depth data of SMMR (1978～1987) and daily snow depth data at 55 primary meteorological stations covering the period of 1963～1992 were used to analyse the spatial and temporal characteristics of snow cover over the Tibetan Plateau by using EOF method. The results show that the spatial distribution of snow cover over the Plateau is very inhomogeneous. It is found that heavy snow cover appears in the periphery, especially in the western and eastern parts of the plateau, while light snow cover appears in the vast interior of the plateau. The heavy snow cover region in the east of the plateau is also the region where the most significant interannual variation of snow cover occurs, and dominates the interannual variation of snow cover in the whole plateau. There is an opposite phase relation between the western parts and the eastern parts of the plateau in the interannual fluctuation of snow cover. There is an increasing trend of interannual fluctuation amplitude of snow cover over the plateau from the 1960s to the 1980s.
出处
《冰川冻土》
CSCD
北大核心
1998年第1期64-67,共4页
Journal of Glaciology and Geocryology
基金
中国科学院"八五"重大应用项目
关键词
青藏高原
积雪深度
EOF分析
空间分布
积雪
Tibetan Plateau, snow depth, EOF analysis, spatial distribution and variation
