摘要
乌鲁木齐河流域山区的地理特点使其气候特征与平原区不同；气温年变幅小，降水年内分配极不均匀。每年１１月至来年３月在海拔１０００－２４００ｍ处形成逆温层。根据不同台站同期年平均降水量分析，大致在海拔１９００ｍ和３５００ｍ左右有两个较大降水带。气温与湿度随海拔的变化在不同高度带内并不一致。６０年代以来，其气温变化较平原地区要小得多，而降水量在减少的同时其变率增加。
The geographic condition make topical features in Urumqi River Valley．Comparingwith low lands，there is a similar seasonal varition of air temperatures in the valley，but oppo-site trend seasonal varition of relective humidity and more disproporate distribution of pre-cipitation. The laps ratio of air temperature is increased with altitude low than 2 400 m a.s.l.and decreased on higher．There is a strong inversion of the air temperature between 1000 to2400 m a.s．l．from November to next March. The vapour pressure is decreased with altitudebut relective huinidity is increased with altitude excipt few height zone. There are two moreprecipitation zone at 1900 m and 3 500 m a.s.l. From 1960s，there is a very little changes ofannal air temperature in the valley but the amount of annal precipitation is much more de-creased.
出处
《冰川冻土》
CSCD
北大核心
1994年第4期333-341,共9页
Journal of Glaciology and Geocryology
关键词
气候特征
气温
降水
河流
：climatic features，air temperature，precipitation
