摘要
利用多种数理统计方法，分析新疆伊犁地区近４０年来的干湿变化，划分出不同的干湿阶段与变化周期，分析了降水与气温、与大气环流及邻近区域间降水的相关关系。
Yili region is located in the western part of Xinjiang (42°12', ~44°48'N, 80°10' ~ 85°02' E), its terrain slopes. from east to west and is in a sequence of Kokirqin Mountain (in the northern part of the Tianshan Mountains), Yili valley, Wusun Mountain, Zhaosu-Tekes Basin, and the southern part of the Tianshan Mountains. It belongs to temperate continental climate in Yili region. Along with global warming. climate change has been paid a great attention to. In this paper, the dry-humid climate change in Yili region, Xinjiang since recent 40 years is analyzed by using some mathematical statistical methods. Some conclusions can be obtained: a. The average annual and seasonal precipitaion series in Yili region have good representative, they have he different dry-humid stages, change periods, and extremely dry or humid years in the recent 40 years. b. There is a good positive correlation between the precipitation in spring, summer and winter and the annual one in Yili region, and there are the significant negative correlations between precipitation and temperature in summer and between temperature in winter and precipitation in spring. C. A sudden change of precipitation in winter occurred from less to more around 1969 in Yili region. d. There is a synchronous change. in annual and seasonal precipitation in Yili region and other areas in north Xinjiang as well as in the southeastern part of Kazakhstans relatively speaking, there are the best positive correlations of precipitation in spring between Yili region and other areas in north Xinjiang and that in winter between Yili region and the southeastern part of Kazakhstan. e. In Yili region, there are the significant correlations of precipitation in spring with the eurasian meridional circulation index from April to May and latitude of polar vorten in April, and in autumn with the intensity of polar vortex from June to Setpember last year and longitude of polar vortex from April to May.
出处
《干旱区地理》
CSCD
北大核心
1999年第4期1-7,共7页
Arid Land Geography
基金
国家自然科学基金!49671009"气候变化对北疆流量的影响与评估"课题
新疆自治区重点科研项目!980103002
