| NUMERICAL SIMULATION OF LAG INFLUENCE OF ENSO ON EAST-ASIAN MONSOON |
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| 作者姓名： | LONG Zhenxi LI Chongyin |
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| 作者单位： | LASG Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029，LASG，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029 |
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| 基金项目： | * This study is supported by "National Key Programme for Developing Basic Sciences"—Research on the Formation Mechanism and Prediction Theory of Severe Climate Disasters in China (G1998040900) and Climbing Programme "A" under Ministry of Science and Technology of China: The South China Sea Monsoon Experiment (SCSMEX). |
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| 摘 要： | By prescribing sea surface temperature anomalies(SSTAs)over eastern equatorial Pacific inJanuary—March,the lag influence of ENSO(El Nino and La Nina)on monsoon over East Asiahas been studied.The results suggest that,due to the excitation of atmospheric low-frequencyoscillation by the SSTA,ENSO has significant lag influence on the monsoon over East Asia.During the summer after E1 Nino,the subtropical high over western Pacific is intensified andshows the northward and westward displacement,meanwhile,the rainfall over East China isbelow normal,especially in North China:during the winter after E1 Nino,both the Asian troughand the winter monsoon over East Asia are strengthened.During the summer after La Nina,theanomalous subtropical high prevails over the lower reaches of Yangtze(Changjiang)River,therainfall between Yangtze and Huaihe Rivers is below normal:during the winter after La Nina,both the Asian trough and the winter monsoon over East Asia are weaker.Compared with LaNina,the effect of El Nino is stronger,but it is not always opposite to the one of La Nina.
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| 收稿时间： | 2000/4/27 0:00:00 |
NUMERICAL SIMULATION OF LAG INFLUENCE OF ENSO ON EAST-ASIAN MONSOON |
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| LONG Zhenxi,LI Chongyin.NUMERICAL SIMULATION OF LAG INFLUENCE OF ENSO ON EAST-ASIAN MONSOON[J].Acta Meteorologica Sinica,2001,15(1):59-70. |
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| Authors: | LONG Zhenxia and LI Chongyin |
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| Institution: | LONG Zhenxia LI Chongyin LASG,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 |
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| Abstract: | By prescribing sea surface temperature anomalies(SSTAs)over eastern equatorial Pacific in January-March,the lag influence of ENSO(El Nino and La Nina)on monsoon over East Asia has been studied.The results suggest that,due to the excitation of atmospheric low-frequency oscillation by the SSTA,ENSO has significant lag influence on the monsoon over East Asia.During the summer after El Nino,the subtropical high over western Pacific is intensified and shows the northward and westward displacement,meanwhile,the rainfall over East China is below normal,especially in North China:during the winter after El Nino,both the Asian trough and the winter monsoon over East Asia are strengthened.During the summer after La Nina,the anomalous subtropical high prevails over the lower reaches of Yangtze(Changjiang)River,the rainfall between Yangtze and Huaihe Rivers is below normal:during the winter after La Nina,both the Asian trough and the winter monsoon over East Asia are weaker.Compared with La Nina,the effect of El Nino is stronger,but it is not always opposite to the one of La Nina. |
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| Keywords: | sea surface temperature anomaly(SSTA) ENSO East Asian monsoon numerical simulation |
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