| NUMERICAL STUDY ON DOMINATING FACTOR AND KEY AREA OF EL NINO CYCLE FORMATION |
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| 作者姓名： | 张勤 Haines Keith |
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| 作者单位： | Nanjing Institute of Meteorology Nanjing 210044，Department of Meteorology，The University of Edinburgh，U.K. |
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| 基金项目： | The work was sponsored by the National Natural Science Foundation of China and Laboratory for Climate Studies,China Meteorological Administration. |
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| 摘 要： | A coupled model,which is employed to study the dominating factor and key area of El Ninocycle formation,consists of a dynamical ocean model and a statistical atmospheric model.Thecoupled model with seasonal forcing successfully reproduces the El Nino event cycle which exhibitsquasi-regular oscillations with a preferred period of about 4 years.The results show that the heatcontent(HC)is transported between the eastern and the western tropical Pacific areas.The spatialdistribution of HC anomalies for four phases of the whole cycle clearly shows a possible formationmechanism of El Nino.Experiments further suggest that sea surface temperature in the tropicalPacific and HC in the central tropical Pacific are the most important factors and the central tropicalPacific is the most important area for determining formation of El Nino cycle.
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NUMERICAL STUDY ON DOMINATING FACTOR AND KEY AREA OF EL NINO CYCLE FORMATION |
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| Zhang Qin Haines Keith Nanjing Institute of Meteorology,Nanjing.NUMERICAL STUDY ON DOMINATING FACTOR AND KEY AREA OF EL NINO CYCLE FORMATION[J].Acta Meteorologica Sinica,1997(2). |
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| Authors: | Zhang Qin Haines Keith Nanjing Institute of Meteorology Nanjing |
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| Institution: | Zhang Qin Haines Keith Nanjing Institute of Meteorology,Nanjing 210044 Department of Meteorology,The University of Edinburgh,U.K. |
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| Abstract: | A coupled model,which is employed to study the dominating factor and key area of El Nino cycle formation,consists of a dynamical ocean model and a statistical atmospheric model.The coupled model with seasonal forcing successfully reproduces the El Nino event cycle which exhibits quasi-regular oscillations with a preferred period of about 4 years.The results show that the heat content(HC)is transported between the eastern and the western tropical Pacific areas.The spatial distribution of HC anomalies for four phases of the whole cycle clearly shows a possible formation mechanism of El Nino.Experiments further suggest that sea surface temperature in the tropical Pacific and HC in the central tropical Pacific are the most important factors and the central tropical Pacific is the most important area for determining formation of El Nino cycle. |
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| Keywords: | coupled model El Nino cycle heat content(HC) |
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