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夏季中高纬500 hPa高度和海表温度异常特征及其相关分析
引用本文:吴国雄,王敬方.夏季中高纬500 hPa高度和海表温度异常特征及其相关分析[J].气象学报,1998,56(1):46-54.
作者姓名:吴国雄  王敬方
作者单位:大气科学和地球流体力学数值模拟国家重点实验室(LASG)(吴国雄),中国科学院大气物理所(王敬方)
摘    要:用旋转主分量(RPC)方法,对1949~1988年40个夏季的中高纬500hPa高度场以及北太平洋和北大西洋海表温度异常(SSTA)的主要时空分布特征作分析,然后通过交叉相关讨论夏季海气相互作用的特征。结果表明,夏季中高纬500hPa高度场最明显的异常型为副热带型(ST),极地北美型(PA),4波型(FW),以及3波型(TW)。夏季北太平洋SST的主要异常型为赤道东太平洋型(EEP),阿拉斯加湾型(BAL),热带中太平洋(CTP),以及北部北太平洋型(NNP)。而夏季北大西洋SST的主要异常型为赤道大西洋型(EAL),加勒比海型(CAR),东部北大西洋型(ENA)和中部北大西洋型(CNA)。夏季中高纬海气之间的最强相关出现在海气异常对应的空间位置上。这种区域性或邻域性的海气相关呈正相关的特征。但海气之间的相关耦合不及冬季紧密,赤道SSTA与中高纬500hPa高度异常的相关不显著。太平洋SSTA所对应的500hPa高度场的相关中心多为局地性,而大西洋SSTA所对应的500hPa高度场的相关中心呈现更有组织性的,甚至是波状的形态。

关 键 词:旋转主分量,500hPa高度异常型,北太平洋SST异常型,北大西洋SST异常型,交叉相关
收稿时间:1996/11/26 0:00:00
修稿时间:1997/2/12 0:00:00

SUMMER TIME CHARACTERISTICS AND CORRELATION OF THE EXTRATROPICAL 500 HPA GEOPOTENTIAL HEIGHT FIELD AND SEA SURFACE TEMPERATURE
Wu Guoxiong and Wang Jingfang.SUMMER TIME CHARACTERISTICS AND CORRELATION OF THE EXTRATROPICAL 500 HPA GEOPOTENTIAL HEIGHT FIELD AND SEA SURFACE TEMPERATURE[J].Acta Meteorologica Sinica,1998,56(1):46-54.
Authors:Wu Guoxiong and Wang Jingfang
Institution:State Key Lab of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100080;State Key Lab of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100080
Abstract:The R otated Principle Component (RPC) technic was employed to analyze the spatialand temporal characteristics of the summer time geopotential height field at 500 hPa and the sea surface temperature anomaly (SSTA) in the Northern Hemisphere by using the 40 a observation data ranging from 1949 to 1988.Their correlation was also studied by using cross correlation technic. Results form these study show that,the majoranomaly patterns of the summer time 500 hPa geopotential height are the subtropical (ST) pattern,the polarand American (PA) pattern,the four wave (FW) pattern,and the three wave (TW) pattern.The major spatial patterns of the summer time SST A over the North Pacific are the easter nequatorial Pacific (EEP),the Bay of Alaska (BAL),the central tropical Pacific (CTP), and the northern North Pacific (NNP) patterns.Whereas those over the North Atlantic are the equatorial Atlantic (EAL),the Caribbean Sea (CAR),the eastern North Atlantic (ENA),and the central North Atlantic (CNA) patterns.
Keywords:Rotated principal component (RPC)  Anomaly patterns of the 500 hPa height  SST anamaly patterns in North Pacific  SST anomaly patterns in the North Atlantic  Cross correlation  
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