近50年西北干旱区的气温差异分析  

Analysis on Temperature Variation in the Arid Region of Northwest China during Resent 50 Years

作　　者：任朝霞[1] 杨达源[2] 王丽霞[1] 

机构地区：[1]长安大学地球科学与国土资源学院,陕西西安710054 [2]南京大学城市与资源学系,江苏南京210093

出　　处：《安徽农业科学》2011年第11期6573-6575,共3页Journal of Anhui Agricultural Sciences

基　　金：长安大学中央高校基本科研业务费专项(CHD2009JC167);长安大学基础研究支持专项;长安大学中央高校基本科研业务费专项(人文社会科学基金)(Y1014);国家自然科学青年基金项目(41001374)

摘　　要：利用近50年西北干旱区21个代表站点的逐月气温资料,通过逐月气温趋势系数和对西北干旱区气温变化贡献最大的月份的比较,深入分析近50年西北干旱区气温变化的差异。结果表明,各月平均气温趋势系数各站点全为正值的月份有1、2、11和12月,冬季升温对西北干旱区增暖的贡献最大。增暖幅度形成依次为南疆-河西走廊-北疆-柴达木盆地增强的趋势。对气温升高贡献最大的月份主要为12、1和2月。其中12月份的站点主要分布在河西走廊,1月份的站点主要分布在新疆,2月份站点主要分布在柴达木盆地,反映了西北干旱区近50年来气候变暖具有较强的地域性特点。Based on the monthly temperature data of 21 stations from 1951 to 2000,the trend coefficient of monthly temperature and the months contributing the largest to temperature variation were compared,the temperature variation in the arid region of Northwest China during resent 50 years was thoroughly analyzed,the results showed that,positive trend coefficients of monthly average temperature in all stations included January,February,November and December,temperature increase in winter made the largest contribution to the temperature increase in the arid region.The temperature increase trend was shown as southern Xinjiang-Hexi passageway-northern Xinjiang-Chaidam Basin from large to small.January,February and December made the largest contribution to temperature increase.Looked from the station distribution of these three months,that of December was in the Hexi passageway,that of January in Xinjiang,that of February in the Chaidam Basin,showing that the climate warming in the arid region of northwest China during the recent 50 years was characterized by strong regional features.

关 键 词：西北干旱区 气温变化 趋势系数分析 

分 类 号：P468.021[天文地球—大气科学及气象学]