岷江上游地区中雨以上降水变化特征分析  

Characteristics of Precipitation above Moderate Rain in the Upper Reaches of Minjiang River

作　　者：李金建[1] 刘希胜 王锐婷[1] 杨涛 

机构地区：[1]四川省农业气象中心,四川成都610072 [2]青海省水文水资源勘测局,青海西宁810001 [3]四川省大气探测中心,四川成都610072

出　　处：《成都信息工程学院学报》2015年第4期390-395,共6页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金资助项目(41375116;41405077;41075066)

摘　　要：为分析岷江上游地区中雨以上降水变化特征,利用岷江上游5县气象站逐日降水观测资料,采用趋势分析、EOF、MK及小波分析等气候统计诊断方法,研究岷江上游地区中雨以上降水的变化特征.结果表明：该地区中雨以上雨量、雨日具有相似的年内分配特征,集中出现在49月;近47年,区域中雨以上降水量及雨日均呈微弱的下降趋势,且在1995年和2008年存在突变现象;周期变化显著,干湿交替明显,主要振荡周期为12年、10年、4年和2年.In order to analyze the characteristics of precipitation above moderate rain in the upper reaches of Minjiang Rivery using the daily precipitation data （1966-2012） of 5 meteorological stations in the upper reaches of Minjiang River, climatic statistical diagnosis methods such as trend analysis, EOF, MK and wavelet analysis, the characteristics of precipitation above moderate rain were analyzed.The results showed that the distribution characteristics in year were similar between rainfall and rain days which concentrated from April to September.In the Recent 47 years, regional precipitation above moderate rain and rain days were slightly decreased, and the abrupt years were 1995 and 2008.The variations of precipitation periods and the phenomenon of transformation between dry and wet periods were obvious.The main oscillation periods were 12 years, 10 years, 4 years and 2 years.

关 键 词：气候学 区域气候变化 岷江上游 中雨 趋势 突变 周期 

分 类 号：P468.024[天文地球—大气科学及气象学]