近45年乌鞘岭及其东、西坡气温变化特征和对比分析

Change Characteristic and Contrastive Analysis of Air Temperature in Wu Shaoling and East and West Slopes in Recent 45 Years

利用1961-2005年河西走廊东部乌鞘岭及其东坡永登和西坡古浪的气温资料,采用统计学的方法对比分析了乌鞘岭及其东坡永登和西坡古浪气温变化特征。结果表明,乌鞘岭、永登、古浪年平均气温呈上升趋势,线性上升率分别为0.27,0.04和0.36℃.(10a)-1,1990年代以来气温上升尤为明显。从平均气温、最高气温、最低气温变化来看,冬季增温大于其它3个季节,冬季低温日数减少的幅度比夏季高温日数增加的幅度更大,因此冬季增温对气温的升高贡献最大。同时发现,乌鞘岭及其东、西坡气温的升高可能是对全球气候变暖的响应,与人类活动和城市热岛效应的关系可能不大。

Using the temperature data of Wushaoling,Yongdeng on its east slope and Gulang on its west slope in the east of Hexi corridor from 1961 to 2005,the change characteristics of their temperature are contrastivly analyzed with statistics method.The results show that the annual mean temperature in Wushaoling,Yongdeng and Gulang increase trend,their linear changing rates are 0.265,0.042 and 0.357℃·（10a）^-1,respectively.The temperature increasing has been significant since the 1990s.From the changes of average temperature,maximum and minimum temperatures,winter warming is the largest than that in other three seasons,decreasing argument of low temperature days in winter is larger than increasing argument of high temperature days in summer,so contribution of winter warming is the biggest to temperature increasing.At that time it is discovered that temperature increasing in Wu shaoling and its east west slopes are a possible response to global warming,but there is not obvious relationship with human activity and city tropical island effect.