Temporal and spatial variation of annual mean air temperature in arid and semiarid region in northwest China over a recent 46 year period

作     者：Chen, ShaoYong Shi, YuanYuan Guo, YuZhen Zheng, YanXiang 

作者机构：CMA Inst Arid Meteorol Key Lab Arid Climat Changing & Reducing Disaster Key Lab Arid Climat Changing & Reducing Disaster Lanzhou 730020 Peoples R China Meteorol Bur Baiyin Baiyin 730900 Peoples R China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2010年第2卷第2期

页      面：87-97页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0815[工学-水利工程] 0705[理学-地理学] 

基　　金：supported by National Natural Science Foundation of China (40775057) 

主　　题：northwest area of China annual mean air temperature climatic warming 

摘      要：We analyzed the 1961-2006 mean surface air temperature data of 138 stations in China’s northwest arid and semi-arid areas(CNASA),to measure climate change in terms of annual mean air temperature *** used methods of linear regression analysis,multinomial fitting,Empirical Or-thogonal Function(EOF),Rotated Empirical Orthogonal Function(REOF),Mann-Kendall,Glide T-examination,wavelet analysis and power spectrum *** results show that(1) the warming rate of the annual mean air temperature in CNASA was 0.35oC/10a during the 1961-2006 study *** places in the west part of Xinjiang and east part of the Qinghai plateau,which is impacted by the terrain of leeward slope,exhibit smaller increasing ***,the majority of region has shown distinct warming in line with general global warming;(2) The standard deviation of the annual mean temperature distribution is *** south Xinjiang and east Qinghai-south Gansu areas show relatively small standard deviations,but the inter-annual variation in annual mean air temperature in the greater part of the region is high;(3) Inner Mongolia,Shaanxi,Gansu,Ningxia and Tarim Basin are the areas where the temperature changes are most sensitive to the *** degree of uniformity in annual mean air temperature increase is higher in the arid and semi-arid *** the early 1970s,the trend in tempera-ture changed from a decrease to an increase,and there was a marked increase in mean temperature in *** that mean temperature went through a period of rapid *** entire area’s 10 hottest years all occurred in or since the 1990s,and 90% of various sub-districts’ hottest years also occurred after *** process of temperature change appears to have a roughly 5-year and a 10-year cycle;(4) An-nual mean air temperature variation has regional *** Inner Mongolia-Xinjiang and Shaanxi-Gansu-Ningxia-Qinghai areas,the temperature variation in their northern areas was very different fro