首页|Differences in spring precipitation over southern China associated with multiyear La Ni?a events

Differences in spring precipitation over southern China associated with multiyear La Ni?a events

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Composite analyses were performed in this study to reveal the difference in spring precipitation over southern China during multiyear La Niña events during 1901 to 2015.It was found that there is significantly below-normal precipitation during the first boreal spring,but above-normal precipitation during the second year.The difference in spring precipitation over southern China is correlative to the variation in western North Pacific anomalous cyclone(WNPC),which can in turn be attributed to the different sea surface temperature anomaly(SSTA)over the Tropical Pacific.The remote forcing of negative SSTA in the equatorial central and eastern Pacific and the local air-sea interaction in the western North Pacific are the usual causes of WNPC formation and maintenance.SSTA in the first spring is stronger than those in the second spring.As a result,the intensity of WNPC in the first year is stronger,which is more likely to reduce the moisture in southern China by changing the moisture transport,leading to prolonged precipitation deficits over southern China.However,the tropical SSTA signals in the second year are too weak to induce the formation and maintenance of WNPC and the below-normal precipitation over southern China.Thus,the variation in tropical SSTA signals between two consecutive springs during multiyear La Niña events leads to obvious differences in the spatial pattern of precipitation anomaly in southern China by causing the different WNPC response.

multiyear La Niñaprecipitation anomalyanomalous western North Pacific cyclonesouthern China

Guangliang Li、Licheng Feng、Wei Zhuang、Fei Liu、Ronghua Zhang、Cuijuan Sui

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National Marine Environmental Forecasting Center,Ministry of Natural Resources,Beijing 100081,China

State Key Laboratory of Marine Environmental Science,College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China

Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China

Key Laboratory of Tropical Atmosphere-Ocean System of Ministry of Education/School of Atmospheric Sciences,Sun Yat-Sen University,Zhuhai 519082,China

School of Marine Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaStartup Foundation for Introducing Talent of Nanjing University of Information Science and TechnologyNational Key Scientific and Technological Infrastructure Project"Earth System Numerical Simulation Facility"(EarthLab)

4157602941976221420304102019YFA0606702

2024

10.1007/s13131-023-2147-0

海洋学报(英文版)
中国海洋学会

海洋学报(英文版)

CSTPCD
影响因子：0.323
ISSN：0253-505X
年,卷(期)：2024.43(2)
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