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《大气和海洋科学快报(英文版)》 2017-02
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Pacific decadal oscillation and the decadal change in the intensity of the interannual variability of the South China Sea summer monsoon

FAN Yi;FAN Ke;Nansen-Zhu International Research Centre,Institute of Atmospheric Physics,Chinese Academy of Sciences;College of Earth Science,University of Chinese Academy of Sciences;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science & Technology;  
The decadal variation of the intensity of the interannual variability(IIV) of the South China Sea summer monsoon(SCSSM) was partly modulated by the Pacific Decadal Oscillation(PDO) during the twentieth century.The SCSSM shows larger(smaller) IIV in the warm(cold) phase of the PDO.Results show that the IIV of the tropical Pacific SST and the ENSO-SCSSM relationship play key roles in the modulation of the PDO on the SCSSM IIV.In the warm phase of the PDO,the variability of the SST in the tropical Pacific tends to be larger than that in the cold phase,along with stronger ENSO events.Subsequently,the interaction between the tropical Pacific SST and the SCSSM becomes stronger via changing the strength and position of the Walker circulation and the anomalous western North Pacific anticyclone.Therefore,the large IIV of the tropical Pacific SST and the close ENSO-SCSSM relationship lead to the large IIV of the SCSSM in the warm phase of the PDO,and vice versa.
【Fund】: jointly supported by the National Natural Science Foundation of China[grant numbers 41325018 and41575079];; the CAS/SAFEEA International Partnership Program for Creative Research Team 'Regional environmental high resolution numerical simulation'
【CateGory Index】: P732
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