博克图地区近30年积雪变化特征分析

摘要

The analysis of snow varia-tion characteristics in recent 30 years (1981—2010) in Boketu region found that annual averaged snow cover days were 139.5 days,annual averaged snow-fall days were 83.5 days,maximum snow depth was 35 cm appeared on November 15, 1998. Snowfall mainly occurred in spring, autumn and winter, and annual averaged snowfall days maximum month was January.The annual snowfall days in the range from 56 to 129, and snowfall days decreasing at the rate of 15.504 d/10 a.%对博克图地区近30年（1981———2010年）积雪变化特征进行分析发现，博克图年平均积雪日数为139.5 d，年平均降雪日数为83.5 d，最大积雪深度为35 cm，出现在1998年11月15日。降雪主要出现在春季、秋季和冬季，年平均月降雪日数最多为1月份，全年降雪日数在56~129 d，降雪日数以15.504 d/10 a的速度递减。