Spatial and temporal temperature variations in Xinjiang,China during 1961-2008  

作　　者：YanWei Zhang WenShou Wei FengQing Jiang MingZhe Liu WenWen Wang Lei Bai KaiFeng Li Rui Shao ZhiWen Dong 

机构地区：[1]Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830000, China [2]Department of Mathematic, Xinjiang University, Urumqi, Xinjiang 830046, China [3]CoM and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China [4]Department of Geo. ＆ Ocean. Sciences, Nanjing University, Nanjing, Jiangsu 210093, China [5]Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China [6]Tianshan Snow and Avalanche Research Station, Chinese Academy of Sciences, Beijing 1 O0101, China

出　　处：《Research in Cold and Arid Regions》2012年第1期74-82,共9页寒旱区科学（英文版）

基　　金：funded by a special scientific research project (GYHY200706008) in the public welfare industry (meteorology);the "Western Light" Project (RCPY200902) of the Chinese Academy of Sciences;the National Natural Science Foundation(41171066) of Xinjiang Institute of Ecology and Geography

摘　　要：This study examines spatial and temporal changes in 16 extreme temperature indices at 37 weather stations in Xinjiang and their associations with changes in climate means during 1961-2008. Linear regression analyses reveal that significant increas- ing trends in temperature were observed over Xinjiang, with the rate of 0.13 ~C/decade, 0.24 ~C/decade, and 0.52 ~C/decade for annual mean temperature, annual maximum, and minimum temperature, respectively. Annual fi＇equency of cool nights （days） has decreased by -2.45 days/decade （-0.86 days/decade）, whereas the frequency of warm nights （days） has increased by 4.85 days/decade （1.62 days/decade）. Seasonally, the frequencies of summer warm nights and days are changing more rap- idly than the corresponding frequencies for cool nights and days. However, normalization of the extreme and mean series shows that the rate of changes in extreme temperature events are generally less than those of mean temperatures, except for winter cold nights which are changing as rapidly as the winter mean minimum temperatures. These results indicate that there have been seasonally and diurnally asymmetric changes in extreme temperature events relative to recent increases in tempera- ture means in Xinjiang.This study examines spatial and temporal changes in 16 extreme temperature indices at 37 weather stations in Xinjiang and their associations with changes in climate means during 1961-2008. Linear regression analyses reveal that significant increas- ing trends in temperature were observed over Xinjiang, with the rate of 0.13 ~C/decade, 0.24 ~C/decade, and 0.52 ~C/decade for annual mean temperature, annual maximum, and minimum temperature, respectively. Annual fi＇equency of cool nights （days） has decreased by -2.45 days/decade （-0.86 days/decade）, whereas the frequency of warm nights （days） has increased by 4.85 days/decade （1.62 days/decade）. Seasonally, the frequencies of summer warm nights and days are changing more rap- idly than the corresponding frequencies for cool nights and days. However, normalization of the extreme and mean series shows that the rate of changes in extreme temperature events are generally less than those of mean temperatures, except for winter cold nights which are changing as rapidly as the winter mean minimum temperatures. These results indicate that there have been seasonally and diurnally asymmetric changes in extreme temperature events relative to recent increases in tempera- ture means in Xinjiang.

关 键 词：climate change TEMPERATURE trend analysis XINJIANG 

分 类 号：P467[天文地球—大气科学及气象学] P468.021