辽宁极端降水事件的时空特征分析  

Analysis of the Spatial and Temporal Characteristic of Extreme Precipitation Events in Liaoning Province from 1961 to 2005

作　　者：王震[1,2] 王颖[3] 

机构地区：[1]南京大学大气科学学院,江苏南京210093 [2]辽宁省气象局,辽宁沈阳110001 [3]沈阳区域气候中心,辽宁沈阳110016

出　　处：《安徽农业科学》2010年第26期14538-14540,14543,共4页Journal of Anhui Agricultural Sciences

摘　　要：选用辽宁省35个代表站1961～2005年逐日降水量,研究极端降水事件的时空分布特征,采用EOF、REOF、均方差等方法,分析不同地域极端降水的变化和分布情况。结果表明,辽宁省年极端降水量可分成3个区,分别是辽宁西部山区和北部部分地区、辽东山区、辽河平原的近沿海地区;在降水量相对较多的地区,极端降水阈值也较大,反之亦然;发生频率较低的极端降水事件对总降水量有较大贡献;辽宁省极端降水量、总降水量以及总雨日变化在夏季最大,冬季最小;极端降水日数在各个季节内变化都不大,在长期变化上也不明显。Selecting 35 observation stations of daily precipitation extreme precipitation events from 1961 to 2005 in Liaoning Province,in order to study the temporal and spatial distribution.Using EOF REOF and other ways to reflect the changes in different regions of extreme precipitation and distribution.The analysis showed that,extreme precipitation in Liaoning Province can be divided into three areas,they are western Liaoning mountains and parts of northern areas,eastern Liaoning mountainous,near-coastal areas of Liaohe River Plain;In the relatively large precipitation areas,extreme precipitation threshold is also higher,and vice versa;The lower frequency of extreme precipitation events have a greater contribution to total precipitation;extreme precipitation,total precipitation and total rain days have the greatest changes in the summer,the least changes in the winter;Number of days of extreme precipitation changes in each season are not great;the change of extreme precipitation in the long term is not obvious.

关 键 词：辽宁 极端降水事件 时空特征 旋转因子 

分 类 号：P426.6[天文地球—大气科学及气象学]