Low-latitude hydroclimate changes related to paleomagnetic variations during the Holocene in coastal southern China  

作　　者：Tingwei ZHANG Xiaoqiang YANG Jian YIN Qiong CHEN Jianfang HU Lu WANG Mengshan JU Qiangqiang WANG 

机构地区：[1]School of Earth Science and Engineering/Guangdong,Provincial Key Laboratory of Geodynamics and Geohazards/Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Sun Yat-sen University,Guangzhou 510275,China [2]Institute of Cultural Heritage,Shandong University,Qingdao 266237,China [3]State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China [4]College of Urban and Environmental Sciences,Peking University,Beijing 100871,China [5]Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China

出　　处：《Frontiers of Earth Science》2024年第2期324-335,共12页地球科学前沿（英文版）

基　　金：supported by the projects of National Second Expedition to the Tibetan Plateau(No.2019QZKK0707);Guangdong Province Introduced Innovative R&D Team of Geological Processes and Natural Disasters around the South China Sea(No.2016ZT06N331);the projects of National Natural Science Foundation of China(Grant Nos.41872217,41672162,and 41904068);the Natural Science Foundation of Guangdong Province(No.2018B030311064).

摘　　要：The variations in precipitation have displayed a complex pattern in different regions since the mid-to-late-Holocene.Cloud formation processes may have a significant impact on precipitation,especially during the tropical marine processes and summer monsoon which convey abundant water vapor to coastal southern China and inland areas.Here,we use two 7500 year sedimentary records from the Pearl River Delta and the closed Maar Lake,respectively,in coastal southern China to reconstruct the mid-to-late-Holocene humidity variability and explore its possible relationship with cloud cover modulated by the Earth’s magnetic fields(EMF).Our proxy records document an apparent increase in wetness in coastal southern China between 3.0 and 1.8 kyr BP.This apparent increase in humidity appears to be consistent with the lower virtual axial dipole moments and,in turn,with a lower EMF.This correlation suggests that the EMF might have been superimposed on the weakened monsoon to regulate the mid-to-late-Holocene hydroclimate in coastal southern China through the medium of galactic cosmic rays,aerosols,and cloud cover.However,further investigations are needed to verify this interaction.

关 键 词：hydroclimate variations Earth’s magnetic field coastal southern China the Holocene epoch 

分 类 号：P73[天文地球—海洋科学]