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半球月平均位势高度场的若干环流指数及其变化特征
引用本文:李巧萍,王盘兴,李丽平.半球月平均位势高度场的若干环流指数及其变化特征[J].南京气象学院学报,2003,26(3):341-348.
作者姓名:李巧萍  王盘兴  李丽平
作者单位:南京气象学院,大气科学系,江苏,南京,210044
基金项目:国家自然科学基金项目 ( 49735170)
摘    要:给出了表征半球月平均位势高度场性质的若干环流指数:气候场强度Ic、气候异常场平均强度Ia、气候场不稳定度Ius。用NCEP/NCAR40a再分析月平均位势高度场资料作了计算和分析,结果表明,这些环流指数存在清晰的时空结构和北、南半球差异,它们概括地给出了地球大气位势高度场气候及其异常的基本特点。

关 键 词:环流指数  月平均位势高度场  变化特征  气候场  气候异常场  时空结构
文章编号:1000-2022(2003)03-0341-08
修稿时间:2002年9月4日

Some Circulation Indices and Their Variation Character of Hemispherical Monthly Mean Geopotential Height Fields
LI Qiao-ping,WANG Pan-xing,LI Li-ping.Some Circulation Indices and Their Variation Character of Hemispherical Monthly Mean Geopotential Height Fields[J].Journal of Nanjing Institute of Meteorology,2003,26(3):341-348.
Authors:LI Qiao-ping  WANG Pan-xing  LI Li-ping
Abstract:To describe the nature of hemispherical monthly mean geopotential height fields,several circulation indices,such as intensity of climate fields I c,intensity of climate anomaly fields I a,instability of climate fields I us ,are defined.Calculation and analysis are performed based on the monthly mean geopotential height fields from NCEP/NCAR 40a reanalysis datsets.Results suggest that the indices exhibit evident spatial-temporal structure and significant difference between Northern and Southern Hemisphere.The basic characterics of the climatology and anomaly of atmospheric geopotential height field are generally presented by the indices proposed.
Keywords:monthly geopotential height fields  climatic and anomalous fields  circulation index  temporal and spatial structure  difference between Northern and Southern Hemisphere
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