Synergistic Interdecadal Evolution of Precipitation over Eastern China and the Pacific Decadal Oscillation during 1951-2015  

作　　者：Minmin WU Rong-Hua ZHANG Junya HU Hai ZHI 

机构地区：[1]Key Laboratory of Ocean Circulation and Waves,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China [2]School of Marine Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China [3]Laosan Laboratory,Qingdao 266237,China [4]School of Atmospheric Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China [5]University of Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Advances in Atmospheric Sciences》2024年第1期53-72,共20页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.42030410);Laoshan Laboratory(No.LSKJ202202403-2);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB40000000);the Startup Foundation for Introducing Talent of NUIST。

摘　　要：By using the multi-taper method(MTM)of singular value decomposition(SVD),this study investigates the interdecadal evolution(10-to 30-year cycle)of precipitation over eastern China from 1951 to 2015 and its relationship with the North Pacific sea surface temperature(SST).Two significant interdecadal signals,one with an 11-year cycle and the other with a 23-year cycle,are identified in both the precipitation and SST fields.Results show that the North Pacific SST forcing modulates the precipitation distribution over China through the effects of the Pacific Decadal Oscillation(PDO)-related anomalous Aleutian low on the western Pacific subtropical high(WPSH)and Mongolia high(MH).During the development stage of the PDO cold phase associated with the 11-year cycle,a weakened WPSH and MH increased the precipitation over the Yangtze River Basin,whereas an intensified WPSH and MH caused the enhanced rain band to move northward to North China during the decay stage.During the development stage of the PDO cold phase associated with the 23-year cycle,a weakened WPSH and MH increased the precipitation over North China,whereas an intensified WPSH and the weakened MH increased the precipitation over South China during the decay stage.The 11-year and 23-year variabilities contribute differently to the precipitation variations in the different regions of China,as seen in the 1998flooding case.The 11-year cycle mainly accounts for precipitation increases over the Yangtze River Basin,while the 23-year cycle is responsible for the precipitation increase over Northeast China.These results have important implications for understanding how the PDO modulates the precipitation distribution over China,helping to improve interdecadal climate prediction.

关 键 词：MTM-SVD PDO SST anomalies interdecadal variability precipitation over China 

分 类 号：P73[天文地球—海洋科学]