| 基本气流在ENSO对北半球冬季大气环流影响中的作用 |
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| 引用本文： | 黄荣辉,严邦良,岸保勘三郎.基本气流在ENSO对北半球冬季大气环流影响中的作用[J].大气科学,1991,15(3):44-54. |
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| 作者姓名： | 黄荣辉 严邦良 岸保勘三郎 |
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| 作者单位： | 中国科学院大气物理研究所
(黄荣辉，严邦良)，日本东京大学地球物理教室(岸保勘三郎) |
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| 摘 要： | 本文从观测事实、理论与数值试验来研究基本气流在ENSO事件对北半球冬季大气环流影响中的作用。通过观测资料的分析,发现1972/1973年冬ENSO现象发生时的基本气流与一般ENSO现象发生年份的基本气流不同,这使得该年冬季ENSO现象所引起的北半球大气环流异常与一般ENSO现象所引起的环流异常型不同。一般ENSO现象所引起的北半球大气环流异常型是PNA型,而1972/1973年冬北半球环流异常型是非PNA型,我国东北地区出现暖冬,冷空气活动弱。
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| 关 键 词： | 基本气流 ENSO事件 准定常行星波 |
Role of basic flow in influence of ENSO on winter circulation over the Northern Hemisphere |
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| Huang Ronghui,Yan Bangliang and K. Gambo.Role of basic flow in influence of ENSO on winter circulation over the Northern Hemisphere[J].Chinese Journal of Atmospheric Sciences,1991,15(3):44-54. |
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| Authors: | Huang Ronghui Yan Bangliang and K Gambo |
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| Abstract: | Role of basic flow in the influence of the ENSO event on the winter circulation over the Northern Hemisphere is investigated from the observational facts, the theory and the numerical experiments in this paper. The difference between the basic flow during the onset of the ENSO event in the winter of 1972/1973 and that during the onset of the usual ENSO event is pointed out with analysis of observational data . In the winter of 1972 /1973 , since the westerly at high latitudes was stronger than the normal, the general circulation anomaly pattern over the Northern Hemisphere caused by the ENSO event was different from that due to the usual ENSO events. The circulation anomaly pattern over the Northern Hemisphere caused by usual ENSO events is of PNA pattern, a cooling winter used to be in the northeast of China and cooling surge frequently intrudes into China. However, in the winter of 1972/1973, the circulation anomaly pattern was not PNA pattern , a warming winter was in the northeast of China, the activities of cooling air were weak . |
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| Keywords: | Basic flow ENSO event Quasi-stationary Planetary wave |
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