摘要
利用车尔臣河流域1955—2010年气温、降水、云量、浮尘、沙尘暴和大风等气象资料,分析了近56 a来流域气候变化特征。结果表明:(1)车尔臣河流域年、季平均气温均呈明显上升趋势,以冬季增暖最显著;且在1990年前后出现了冷暖突变,2001—2010年是近56 a来最暖的时期。(2)年、季降水量呈小幅增加趋势,春季降水增加趋势达显著水平;降水在1963年前后出现干湿突变,而20世纪80年代后降水增加则趋于平稳。(3)年、季平均总云量呈增加趋势,其中夏季云量的增加最明显。(4)年浮尘、沙尘暴和大风日数呈显著减少趋势,但值得注意的是2005年以后沙尘日数不降反升。总体上看,近56 a车尔臣河流域气候朝暖湿方向发展,生态环境明显改善。
Based on the daily meteorological data from Cherchen River Basin during 1955-2010, the change characteristics of various climatic elements such as temperature, precipitation, cloud amount, floqting-dust days, sand storm days and strong wind days were analyzed.The main results are as follows： （1）The annual mean temperature and seasonal mean temperature were obviously increasing, and especially there was a remarkable increase in winter. Meanwhile the annual mean temperature had a sudden change in 1990.The period from 2001 to 2010 was the warmest in recent 56 years.（2）Annual precipitation and seasonal precipitation all presented faint increasing trends, especially in spring. The annual precipitation had a sudden change in 1962 and a stable period appeared since 1980s. （3）The annual cloud amount and seasonal cloud amount also had obviously increasing trends, especially in summer. （4）The annual floating-dust days, annual sand storm and strong wind days obviously decreased, however, the floating-dust and sand storm days increased since 2005 instead of decreasing, which should be paid attention to. The improvement of ecological environment was more obvious and the climate was being warmer and wetter in Cherchen River Basin.
出处
《沙漠与绿洲气象》
2012年第6期28-33,共6页
Desert and Oasis Meteorology
基金
新疆气象局青年基金项目(201239)资助
关键词
车尔臣河
变化特征
趋势分析
突变
Cherchen River
change characteristics
trend analysis
abrupt change
