近45a东北地区春季降水异常的气候特征
投稿时间:2004-02-11  修订日期:2004-04-15  点此下载全文
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作者单位
杨素英 中国气象局, 沈阳大气环境研究所, 辽宁, 沈阳, 110016 
孙凤华 中国气象局, 沈阳大气环境研究所, 辽宁, 沈阳, 110016 
陈岩 广州市防汛防旱防风总指挥部办公室, 广东, 广州, 510640 
基金项目:科技部公益类专项“气候变暖对东北气候事件影响”资助
中文摘要:利用1959—2003年我国东北地区93站春季降水资料,将降水场分成5个区域,并在此基础之上分析了春季降水的时空变化特征,发现:降水量年际变化及长期趋势有明显的区域差异,呈东多西少的分布特征;西部是旱涝易发生区,近45a来降水量略有增多;降水量的周期振荡存在明显的区域差异。
中文关键词:东北地区  降水区划  REOF
 
Climatic Features of Spring Precipitation Anomalies in Northeast China in the Past 45 Years
Abstract:In this paper,the climatic features of the spring(MAM) precipitation anomalies in Northeast China are studied using the monthly precipitation data of 93 stations during 1959—2003.The five climatic divisions for spring precipitation in Northeast China are made by applying the Rotated Empirical Orthogonal Function method.It is found that the interannual change and secular trend of the spring precipitation show obvious regional differences,i.e.a distributive character of the precipitation more in the east and less in the west;the west region is vulnerable to drought/flood,and the precipitation has been slightly increased in the past 45 years;the secular trend and periodical characteristics of the spring precipitation also exhibit regional differences.
keywords:Northeast China  climatic division  Rotated Empirical Orthogonal Function(REOF)
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