Influence and mechanism of solar radiation intensity on the interdecadal variability of strong Meiyu events during historical periods

作     者：Liulin WANG Liang NING Kefan CHEN Mi YAN Jian LIU Zhengyu LIU Yanmin QIN Jiao XUE Chuxin LI Wang L;Ning L;Chen K;Yan M;Liu J;Liu Z;Qin Y;Xue J;Li C

作者机构：Key Laboratory for Virtual Geographic EnvironmentMinistry of Education/State Key Laboratory Cultivation Base of Geographical Environment Evolution of Jiangsu Province/Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application/School of GeographyNanjing Normal UniversityNanjing210023China Open Studio for the Simulation of Ocean-Climate-IsotopePilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China Climate System Research CenterDepartment of GeosciencesUniversity of MassachusettsAmherst01003USA State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an710061China Department of GeographyThe Ohio State UniversityColumbusOH43210USA 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2023年第66卷第2期

页      面：408-416页

核心收录：

学科分类：07[理学] 0708[理学-地球物理学] 0706[理学-大气科学] 

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Category B)(Grant No.XDB40000000) the National Natural Science Foundation of China(Grant Nos.42130604,41971021,41971108,42075049&42111530182) Open Funds of State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences(Grant Nos.SKLLQG1820&SKLLQG1930)。 

主　　题：Ming Dynasty Historical flood Strong Meiyu events Solar radiation CESM-LME 

摘      要：Most recent studies on Meiyu over the middle and lower reaches of the Yangtze River(MLRYR)have focused on its interannual variability or the mechanism of certain abnormal events.The influence and physical mechanism of solar radiation intensity on the interdecadal frequency of strong Meiyu events over the MLRYR during historical periods were investigated using reconstructed precipitation data,reconstructed solar radiation data,and model simulation data.First,according to the solar radiation intensity,the Ming and Qing Dynasties(1470-1850)were divided into three periods of strong solar radiation and three periods of weak solar radiation.It was found that during the periods of strong solar radiation,the frequency of strong Meiyu events was significantly higher than that during the periods of weak solar radiation in the reconstructed precipitation data and model simulations.Mechanism analyses show that during the periods of strong solar radiation,the Western Pacific Subtropical High(WPSH)is stronger,and the blocking highs over the middle-high-latitudes are also stronger,which is conducive to the continuous convergence of the southward cold air and the northward warm and humid air flow at the MLRYR.Therefore,a circulation spatial pattern conducive to the occurrence of strong Meiyu events is then induced.The probability distributions of precipitation also show that,during periods of strong solar radiation,changes in circulation patterns cause the probability distribution of precipitation to shift significantly to the right,increasing the probability of strong Meiyu events occurring on the right side of the probability distribution.