成都地区降水时空分布变化  

Temporal-Spatial Distribution of Precipitation in Chengdu

作　　者：李昕翼[1,2] 肖国杰[1] 白爱娟[1] 施娟 

机构地区：[1]成都信息工程学院大气科学学院高原大气与环境四川省重点实验室,成都610225 [2]成都市气象局,成都610071

出　　处：《气象科技》2011年第4期417-422,共6页Meteorological Science and Technology

基　　金：国家自然科学基金资助项目(40975020)资助

摘　　要：分析成都地区12个气象观测站50年(1960—2009年)逐日降水资料的时空分布变化规律得出:成都地区年降水量、汛期有雨日降雨强度、最大日降水量均呈现出逐渐下降的趋势。降水量主要集中在夏季,盛夏7、8两个月降水量占全年降水总量的47%;降水空间分布的主要类型为东—西走向,即降水量的地区分布趋势是西部多于东部;对降水量的M-K突变检验表明,大部分地方存在年降水总量的突变。The temporal trend and spatial distribution of precipitation during the last 50 years are analyzed on the basis of observation data from 12 stations over the Chengdu region.The results show that significant decreasing trends could be seen in annual precipitation,precipitation intensity in wet season,and maximum daily rainfall amount.The precipitation concentrates in summer,and the precipitation in July and August accounts for 47 percent of that of the total year.The annual precipitation and maximum daily rainfall amount decrease from west to east.The M-K sudden-change test is conducted for these stations,and the results show that there exist sudden-changes in annual precipitation for most stations.

关 键 词：降水特征 时空分布 线性倾向估计 M-K检验 

分 类 号：P467[天文地球—大气科学及气象学]