近45a辽宁夏季降水的气候特征  

Climatic Properties of Summer Precipitation of the Last 45 Years in Liaoning Province

作　　者：王艳[1] 赵春雨[1] 杨洋[2] 

机构地区：[1]沈阳区域气候中心,辽宁沈阳110016 [2]南京信息工程大学大气科学系,江苏南京210044

出　　处：《黑龙江气象》2008年第1期13-16,共4页Heilongjiang Meteorology

摘　　要：利用1961～2005年辽宁省53个测站,6～8月降水量资料,采用EOF、趋势分析等方法,对辽宁地区夏季降水量的空间分布特征和时间演变规律进行了诊断分析研究。结果表明:辽宁地区夏季降水的空间分布既有整体一致的性质,也存在东南部和西北部相反变化的差异。近45 a来,辽宁地区夏季降水有减少趋势,并且存在着4～6 a的周期变化。辽宁夏季及其各月降水都有明显的年代际变化特征,20世纪60年代夏季降水处于偏多时段,70年代偏少,80年代和90年代偏多,进入21世纪的前5 a降水偏少。Using 1961～2005 a summer（Jun.～Aug.） precipitation data over 53 stations of Liaoning province,the temporal and spatial variability features were studied by applying the methods of EOF、trend analysis and so on.The results showed that the summer precipitation distribution exhibits the common features as well as the spatial differences.Summer precipitation was decreasing trend over Liaoning region in the last 45 years.Generally,the period of the change was about 4 to 6 years.Summer precipitation was significant interdecadal variations.Summer precipitation was partial to more in 1960＇s and less in 1970＇s,and then more in 1980＇s and 1990＇s.Since the 2000＇s,that of first 5 years had been low in the probability distribution of ensemble average.

关 键 词：EOF方法 辽宁 夏季降水量 分布特征 

分 类 号：P468.024[天文地球—大气科学及气象学]