大气环流的年代际变化 I.观测资料的分析  被引量:34

Interdecadal Variations of Atmospheric Circulation I. Observational Analyses

作  者:穆明权[1] 李崇银[1] 

机构地区:[1]中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京100029

出  处:《气候与环境研究》2000年第3期233-241,共9页Climatic and Environmental Research

基  金:中国科学院!KZ952-S1-403项目;九五"攻关项目!96-908-01-01-04

摘  要:利用多种资料分析研究了大气环流(包括几个主要大气涛动、一些主要大气环流系统)的时间变化特征。结果清楚地表明大气环流,无论是热带大气还是中高纬度的大气环流,存在着显著的年代际变化特征,主要为10~20年准周期振荡和30多年准周期振荡。北大西洋涛动( NAO)和北太平洋涛动( NPO)的 10~ 20年准周期振荡有近乎同位相特征,而它们的30多年准周期振荡却有近乎反位相变化。西太平洋副高强度与北美大槽强度的变化在10~20年时间尺度既有同位相情况也有反位相情况;但在30多年时间尺度却是基本同位相的。西太平洋副高强度与东亚大槽强度变化在30多年时间尺度也是基本同位相的,且副高变化超前约5~7年。Through observational analyses of the temporal variations of atmospheric circulation, including the key atmospheric oscillations and the primary atmospheric circulation systems, the results strikingly show that the distinct interdecadal variations exist not only in the tropical atmosphere but also in the mid-high latitude atmospheric circulation. The principal interdecadal oscillations refer to 10-20 years and more than 30 years quasi-Periodical waves. The phase of North Atlantic Oscillation (NAO) covering 10- 20 years time scale well agrees with that of North Pacific Oscillation (NPO), but for more than 30 years oscillation, they are nearly out of phase to each other. In the time scale of 10-20 years, some time the phase of subtropical high strength in the western Pacific region is consistent with that of North American trough strength, some time they are out of phase. But, during the period of more than 30 years their phases are basically parallel. Subtropical high strength in the western Pacific region is mainly in phase to East Asian trough strength in the time scale of more than 30 years, and meanwhile the former leads the later about 5 - 7 years.

关 键 词:大气环流 年代际变化 准周期振荡 西太平洋副高 位相 时间尺度 北太平洋涛动 时间变化特征 利用 纬度 

分 类 号:P732[天文地球—海洋科学] P434

 

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