| EL NINO EPISODE-RELATED NH 100 hpa CIRCULATION ANOMALY |
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| 作者姓名： | 施能 沈桐立 曹鸿兴 |
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| 作者单位： | Naning Institute of Meteorology, Naming 210044;Naning Institute of Meteorology, Naming 210044;China Academy of Meteorological Sciences, Beijing 100081 |
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| 基金项目： | This study is supported in part by China SMA's Project of Theory and Method for Short-Range Climatic Prediction and in part by China Foundation for Meteorological Institutions |
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| 摘 要： | Investigation is carried out of winter Northern Hemisphere (NH) 100 hpa teleconnection, indicating the existence of a PNA pattern whose wavetrain well resembles that at 500 hpa level. During the climax of the EI Nino episode (winter), the 100 PNA becomes strong, a fact that manifests itself more clearly than at the 500 hpa level. Moreover, study is made of the anomaly in the tropical monthly windfield and mean circulation on a seasonal basis in a range of phases of the EI Nino event. Results show that the 100 hpa geopotential height is lowered on a large scale in the spring and previous winter with the event happening as compared to a La Nina year, wherewith diagnosis is performed of the 1991/1992 EI Nino episode.
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| 关 键 词： | hpa height PNA teleconnection pattern EI Nino event circulation anomaly intensityindex |
| 收稿时间： | 1993/12/14 0:00:00 |
| 修稿时间： | 1994/4/28 0:00:00 |
EL NINO EPISODE-RELATED NH 100 hpa CIRCULATION ANOMALY |
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| Shi Neng,Shen Tough and Cao Hongxing.EL NINO EPISODE-RELATED NH 100 hpa CIRCULATION ANOMALY[J].Journal of Tropical Meteorology,1995,1(1):23-33. |
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| Authors: | Shi Neng Shen Tough and Cao Hongxing |
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| Institution: | Naning Institute of Meteorology, Naming 210044;Naning Institute of Meteorology, Naming 210044;China Academy of Meteorological Sciences, Beijing 100081 |
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| Abstract: | Investigation is carried out of winter Northern Hemisphere (NH) 100 hpa teleconnection, indicating the existence of a PNA pattern whose wavetrain well resembles that at 500 hpa level. During the climax of the EI Nino episode (winter), the 100 PNA becomes strong, a fact that manifests itself more clearly than at the 500 hpa level. Moreover, study is made of the anomaly in the tropical monthly windfield and mean circulation on a seasonal basis in a range of phases of the EI Nino event. Results show that the 100 hpa geopotential height is lowered on a large scale in the spring and previous winter with the event happening as compared to a La Nina year, wherewith diagnosis is performed of the 1991/1992 EI Nino episode. |
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| Keywords: | hpa height PNA teleconnection pattern EI Nino event circulation anomaly intensityindex |
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