摘要
利用1971—2011年乌鲁木齐小渠子气象站资料,对南山中山带40 a来的积雪特征及变化特点进行了分析。结果表明:乌鲁木齐南山中山带平均稳定积雪期为144 d;近40 a来出现的最大积雪深度为57 cm,年最大积雪深度出现在3月下旬的频率最大,平均积雪深度以2月最厚。自20世纪80年代以来出现稳定积雪初日推迟、终日提前、稳定积雪期缩短的趋势。近40 a来最大积雪深度递增趋势主要是由于冬季降水量增加和降雪强度增强所造成;而随着气温的逐渐变暖则造成稳定积雪初日的推迟和终日提前。
Based on the meteorological data of Xiao quzi meteorological station in Urumqi during 1971 to 2011,the author analyzed the variation Characteristics of snow cover to the Mid-mountain Area of Urumqi South Mountain in 40 year. The results show that：the stable stage of snow cover in the Mid-mountain area of Urumqi South Mountain is 144 days;The maximun snow depth is 57 cm in past 40a; It is the most thick of average depth of snow in February and It is Most likely of annual maximum snow cover depth appear in end of March. Since the 1980s there has been delayed the First day of the stable snow and has been earlyed of the Terminal Day, and a trend was presented that stable snow stage is shortening. During the past nearly 40 years, Increases of Maximum depth of snow cove Mainly due to increase of precipitation and strengthen of snowfall in winter. With the weather gradually getting warmer, the First days of the stable snow has been delayed and Terminal Day has been earlyed.
出处
《沙漠与绿洲气象》
2013年第2期29-33,共5页
Desert and Oasis Meteorology
基金
中央级公益性科研院所基本科研业务项目(IDM201206)
公益性行业(气象)科研专项(GYHY201106007)共同资助
关键词
积雪
中山带
乌鲁木齐
南山
特征
snow cover
Mid-mountain area
Urumqi
South Mountain
characteristics
