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气象:2007,33(8):83-89
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江淮梅雨与冬季西太平洋海温的SVD分析
(1.南京信息工程大学大气科学学院, 210044;2.成都信息工程学院 高原大气 与环境研究中心四川省高校重点实验室;3.四川甘孜州气象局;4.新疆气象台)
SVD Analysis of Precipitation in the Changjiang Huaihe River Valley and the Sea Surface Temperature of the Western Pacific Ocean in Winter
(1.Institute of Atmospheric Science, NUIST, Nanjing 210044;2.Center of Plateau Atmospheric and Environmental Research, Chengdu  University of Information Technology;3.Ganzi Meteorological Office,Sichuan Province;4.Xinjiang Meteorological Observatory)
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投稿时间:2006-12-27    修订日期:2007-06-28
中文摘要: 利用江淮流域1954—2001年48年梅雨量资料和美国NCEP/NCAR 1953—2001全球逐月海温再分 析格点资料,网格距为2°×2°,采用EOF、合成分析和SVD分解等方法讨论了江淮梅雨与西 太平洋海温的关系。结果表明:影响江淮梅雨的海温关键区是西太平洋暖池区,关键影响时 段是前1年的12月至当年的2月(以下简称冬季);当年冬季西太平洋暖池区海温异常偏高,同 年江淮大部地区梅雨量异常偏多,反之亦然。SVD分解结果与合成分析的结果相吻合,通过 信度0.05的Monte Carlo显著性检验。
中文关键词: 梅雨  EOF  SVD分解  Monte Carlo检验  海温
Abstract:Based on the precipitation of Meiyu at 37 stations in the Changjiang Huaihe riv er valley from 1954 to 2001 and the mean monthly reanalysis SST data (grid:2° ×2°) of NCEP/NCAR from 1953 to 2001, the relationship between Meiyu precipit ation and the sea surface temperature in the West Pacific Ocean are investigat ed in terms of empirical orthogonal function(EOF), composite analysis, singular value decomposition (SVD), and so on. Results show that the key SST region which influences lies in the warm pool of the West Pacific Ocean and the key pe riod is from December of the former year to February in the next year(simply cal led “former winter"). Meiyu precipitation is increasing (decreasing) in the cor responding period when SST of the warm pool in the West Pacific Ocean in the win ter is warmer (colder) than average. Results of SVD are consistent with those of composite analysis, which passed the prominent test of Monte Carlo at 0.0 5.
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基金项目:国家自然科学基金面上项目“我国气温和降水极端事件及其与全球不均 匀增暖的联系”(40675042)、“973”国家重点基础研究发展规划项目“我国南方致洪暴 雨监测与预测的理论和方法研究”(2004CB418300)和国家自然科学基金重点课题“江淮梅雨 的年际和年代际变化规律及其影响机制研究”(40233037)共同资助
引用文本:
毛文书,王谦谦,景艳,李如琦,杨霞,2007.江淮梅雨与冬季西太平洋海温的SVD分析[J].气象,33(8):83-89.
Mao Wenshu,Wang Qianqian,Jing Yan,Li Ruqi,Yang Xia,2007.SVD Analysis of Precipitation in the Changjiang Huaihe River Valley and the Sea Surface Temperature of the Western Pacific Ocean in Winter[J].Meteor Mon,33(8):83-89.