叶培龙,李艳,王式功,汪栩加,尚可政

• 1:兰州大学大气科学学院半干旱气候变化教育部重点实验室
• 2:兰州中心气象台

摘要(Abstract)：

分析了1968-2010年北半球阻塞高压频发区不同强度、生命期阻高的变化特征,从阻高强度和阻高生命期两方面分析阻高多发年、少发年与北半球地表温度的关系,结果显示:北半球的3个阻高频发区中,大西洋地区阻高出现总次数最多,太平洋地区次之,欧亚区最少;从阻高强度来看,3个阻高频发区强阻高次数均有减少趋势,以大西洋区最为显著,弱强度阻高变化趋势不明显;对于阻高生命期,长生命期阻高发生次数在21世纪以前变化不大,但近10年增加明显,短生命期阻高发生次数只有大西洋区在减少.大西洋区强阻高中长生命期阻高占25%,而太平洋区仅为14%,阻高强度越强时,出现长生命期阻高的概率也就越大.不同强度、生命期阻高对温度的影响差异显著.3个阻高频发区的长生命期阻高多发年与少发年温度差值的负异常区主要分布在中低纬度地区,而正异常区主要在高纬度地区;大西洋区、太平洋区长生命期阻高在多发年引起中低纬度地区的降温及高纬度地区的增温比强阻高产生的影响显著.

关键词(KeyWords)： 阻高强度;阻高生命期;北半球;温度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41225018,41275070,41305105);; 国家公益性行业(气象)专项项目(GYHY201206004);; 高等学校博士学科点专项科研基金项目(20120211120030);; 中央高校基本科研业务费专项资金项目(LZUJBKY-2014-204,LZUJBKY-2015-6,LZUJBKY-2015-8)

作者(Author): 叶培龙,李艳,王式功,汪栩加,尚可政

DOI: 10.13885/j.issn.0455-2059.2015.05.008

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