IOCAS-IR  > 海洋地质与环境重点实验室
Global Cooling-Driven Summer Monsoon Weakening in South China Across the Eocene-Oligocene Transition
Jiao, Wenjun1; Wan, Shiming1,2; Li, Yong-Xiang3; Zhao, Debo1; Liu, Chang4; Jin, Hualong1; Li, Mengjun1; Yu, Zhaojie1; Zhang, Jin1; Pei, Wenqiang1; Li, Anchun1
2023-11-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN2169-9313
Volume128Issue:11Pages:20
Corresponding AuthorWan, Shiming(wanshiming@ms.qdio.ac.cn)
AbstractRecent research has suggested that East Asia has experienced a prevailing monsoon climate since the Eocene. However, there is little knowledge about the development of the East Asian monsoon system before the Miocene, particularly in southern China, due to a lack of well-dated continuous sediment records. Here, we present new magnetic proxy records from International Ocean Discovery Program Site U1501 in the northern South China Sea. We conducted rock magnetic experiments, made scanning electron microscopy observations and performed diffuse reflectance spectrum analysis on the late Eocene-early Oligocene core sediments. The magnetic signal of the sediments is dominated by detrital magnetite and titanomagnetite formed during the silicate weathering and erosion processes, which were used to infer the evolution of summer monsoon precipitation in southern China. Our results along with geochemical and clay mineral data from Site U1501 strongly indicate that the East Asian summer monsoon generally weakened across the Eocene-Oligocene transition. This change was linked to coeval global cooling rather than tectonic processes. Prior to the Eocene-Oligocene transition, the summer monsoon intensified, likely due to the latest Eocene warming event caused by the enhancement of the Atlantic Meridional Overturning Circulation, which may have preconditioned the Earth system for the greenhouse-to-icehouse transition.
KeywordEast Asian monsoon South China Sea environmental magnetism global cooling Eocene-Oligocene transition International Ocean Discovery Program (IODP) gSite U1501
DOI10.1029/2023JB027265
Indexed BySCI
Language英语
Funding ProjectWe acknowledge the International Ocean Discovery Program and the scientific party and technicians of IODP Expedition 368 for recovering the samples. We are grateful to Dr. Qingsong Liu, Zhong Yi and Han Peng for their assistance in DRS measurements and dat ; International Ocean Discovery Program[42125602] ; International Ocean Discovery Program[42006050] ; International Ocean Discovery Program[42076052] ; International Ocean Discovery Program[4212500229] ; National Natural Science Foundation of China[XDB40010100] ; Strategic Priority Research Program of the Chinese Academy of Sciences[2022YFF0800503] ; National Key Research and Development Program of China[2017ASTCP-ES01] ; Taishan and Aoshan Talents Program
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:001099683800001
PublisherAMER GEOPHYSICAL UNION
WOS KeywordEAST-ASIAN MONSOON ; TIBETAN PLATEAU ; MAGNETIC-SUSCEPTIBILITY ; ENVIRONMENTAL-CHANGES ; SEA IMPLICATIONS ; CLIMATE ; EVOLUTION ; TEMPERATURE ; RECORDS ; UPLIFT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/184074
Collection海洋地质与环境重点实验室
Corresponding AuthorWan, Shiming
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
3.Nanjing Univ, Inst Geophys & Geodynam, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China
4.Texas A&M Univ, Int Ocean Discovery Program, College Stn, TX USA
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jiao, Wenjun,Wan, Shiming,Li, Yong-Xiang,et al. Global Cooling-Driven Summer Monsoon Weakening in South China Across the Eocene-Oligocene Transition[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2023,128(11):20.
APA Jiao, Wenjun.,Wan, Shiming.,Li, Yong-Xiang.,Zhao, Debo.,Liu, Chang.,...&Li, Anchun.(2023).Global Cooling-Driven Summer Monsoon Weakening in South China Across the Eocene-Oligocene Transition.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,128(11),20.
MLA Jiao, Wenjun,et al."Global Cooling-Driven Summer Monsoon Weakening in South China Across the Eocene-Oligocene Transition".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 128.11(2023):20.
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