摘要
本文依据气象、野外调查和部分文献资料写成,着重分析了天山最大积雪深度、积雪初、终期及其积雪期特征。研究表明,天山积雪存在明显地域差异:中天山和南天山南坡部分山区最大雪深超过100cm,甚至达到200或300cm,而东天山南坡盆地雪深仅15cm。中山带及其以下地区最大雪深出现在冬季始末,而高山带在暖季。林区雪深随海拔而增加,并在林线附近达到最大,然后急剧减小。天山中段北坡海拔440—3500m之间,每上升100m,积雪期延长80天;南坡小于此值。
The characteristics of maximum depth. starting and ending dates.and duration of snow cover in the Tianshan Mountains were analyzed based on the meteorological records.field investigation data and references. The result of the study shows that the snow cover in the Tianshan mountains is characterized by obviously regional differences. The maximum depth can reach100 cm.even 200 or 300 cm in some places of the Central Tianshan Mountains and on the south slope of the South Tian—shan Mountains.while the maximum depth is merely 15 cm in some places on the south slope of the east Tianshan Mountains. The maximum depth appears at the beginning or end of the winter season in some places of middle and low mountains.while occurs in the warm season in alpine mountains. The thickness of snowcover in forest area increases with the increase of elevation and reaches a peak magnitude nearby tree line. rapidly decreases above it. The duration of snow cover extends over 8 days if the elevation increases each 100 m in the range from 440 to 3 500mon the north slope of the middle section of the Tianshan Mountains. The gradient on the south slope is lower than that on north slope.
出处
《干旱区地理》
CSCD
北大核心
1992年第3期9-21,共13页
Arid Land Geography
基金
国家基金<天山北圾积雪遥感监测及春季洪旱灾害预报研究>成果之一
关键词
积雪
积雪期
深度
天山
snow cover.duration of snow cover,snow cover depth.
