敦煌绿洲近54a气候变化特征研究  

Climate change in Donghuang Oasis since recent 54 years

作　　者：刘普幸[1] 张锐[1] 吴三雄 

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070 [2]甘肃敦煌西湖国家级自然保护区,敦煌736200

出　　处：《干旱区资源与环境》2010年第7期98-102,共5页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(40961035);甘肃省自然科学基金项目(0803RJZA094);甘肃省教育厅导师项目(0801-11);甘肃省级重点学科自然地理学共同资助

摘　　要：利用敦煌气象站1952-2005年气温和降水的观测资料分析表明:54a来,敦煌绿洲年平均气温总体呈上升趋势,其变化倾向率为0.173℃/10a,并以冬季增暖最显著,最低气温增温最突出,其变化倾向率分别为0.384℃/10a,0.331℃/10a,对全年气温变化的贡献最大。年平均降水量则在波动中微有增加,其变化倾向率2.398mm/10a,且以夏季增湿最多,冬季略有减少,气候变化具有明显的区域特征。Based on the observed data of the temperature and precipitation from 1953 to 2006 in Donghuang Oasis,the characteristics of climate change were analyzed.The results indicated that the mean annual temperature was significantly increasing and its variability was 0.173℃/10a in resent 54 years,especially,the trend of temperature increase was the most remarkable in winter and the mean annual minimum temperature of extreme temperature and theirs variability were 0.384℃/10a,0.331℃/10a,respectively.Their contributions to the annual temperature change were the biggest.Meanwhile the mean annual precipitation was little increasing and its variability was 2.398mm/10a,and so did the precipitation in summer,spring and autumn,but the precipitation in winter was slowly decreasing.The precipitation in summer was the largest but in winter was the smallest. Climatic change showed distinct regional characteristics.

关 键 词：敦煌绿洲 气候变化 气温 降水 

分 类 号：P467[天文地球—大气科学及气象学]