1991-2020年新疆降水的时空变化特征  

Characteristics of the Spatiotemporal Variation of Precipitation in Xinjiang from 1991 to 2020

作　　者：李晔 曼吾拉·卡德尔 LI Ye;MAVLAN Kader(Xinjiang Airport(Group)Co.Ltd.,Urumqi 830000)

机构地区：[1]新疆机场(集团)有限责任公司,新疆乌鲁木齐830000

出　　处：《广东气象》2022年第3期42-45,53,共5页Guangdong Meteorology

摘　　要：利用新疆35个观测站1991—2020年逐日降水量资料,采用降水变差系数、线性趋势分析、Morlet小波分析等方法研究了新疆天山南、北坡与山区的降水时空变化特征。结果表明:新疆降水量空间分布差异大,从北向南减少的梯度明显且西部多于东部。夏季降水量占全年降水量45%,山区降水量相对稳定,北坡降水四季分布更均衡,南坡降水量主要在夏、春两季。近30年降水量总体呈显著增加趋势,而且秋季降水量增加更明显,降水量具有准10和准20年的周期。Using the data of daily precipitation amount observed at 35 stations in Xinjiang from 1991 to 2020 and with the methods of variation coefficients,linear tendency analysis and Morlet wavelet analysis,this work studies the characteristics of spatiotemporal variation of precipitation in Xinjiang in the southern and northern slopes of the Tianshan Mountains and mountainous areas in the region.The results are shown as follows.The spatial distribution of precipitation amount is much different across Xinjiang with an obvious decreasing gradient from the north to the south and the precipitation amount is larger in the west than in the east.The precipitation amount of summer takes up 45%of the yearly total.It is relatively consistent in mountainous areas.While it is more balanced throughout all seasons in the northern slopes of the Tianshan Mountains,it mainly occurs in summer and autumn in the southern slopes.For the 30 years studied,the precipitation amount shows a significantly increasing trend and even more so in autumn.The precipitation amount is periodical at the scales of 10 and quasi-20 years.

关 键 词：气候学 降水量 时空分布 新疆 

分 类 号：P46[天文地球—大气科学及气象学]