Persistent Influence of Non-Dipole Geomagnetic Field on East Asia Over the Past 4,000 Years

doi:10.1029/2023JB027359

	Persistent Influence of Non-Dipole Geomagnetic Field on East Asia Over the Past 4,000 Years
	Li, Hai 1; Tang, Jianhui2 ; Gai, Congcong 1; Zhang, Weijie 1; Humbert, Fabien 1,3; Ni, Youzhong 4; Chou, Yu-Min 1,5; Liu, Qingsong 1,5,6
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN	2169-9313
	2023-12-01
卷号	128 期号:12 页码:17
DOI	10.1029/2023JB027359
通讯作者	Chou, Yu-Min(chouym@sustech.edu.cn) ; Liu, Qingsong(qsliu@sustech.edu.cn)
英文摘要	The observed variations in intense geomagnetic flux lobes have a significant impact on regional geomagnetic fields, and produce unique geomagnetic characteristics. To investigate the time-dependent effect of the Siberian flux lobe on the geomagnetic field in East Asia, we reconstructed a stacked full-vector paleomagnetic secular variation record (since 2000 BCE) from three sediment cores collected in the Bohai Sea, China. Age models of the studied cores were established through a combination of radiocarbon 14C dating and inter-profile correlation of mass-normalized magnetic susceptibility. Rock magnetic results indicate that fine-grained magnetite is the primary remanent carrier. We found that the paleomagnetic field records in the Bohai Sea correspond more closely with those from the middle latitudes, rather than the low latitudes. This was primarily attributed to the variation of the Siberian flux lobe. This study provides a better understanding of the contrasting patterns of regional geomagnetic fields in East Asia, and emphasizes the significant role played by the Siberian flux intensity lobe in shaping their formation. The Earth's magnetic field is in a constant state of flux, both temporally and spatially, and plays a crucial role in protecting our planet from solar wind and cosmic rays. The long-term variation of the Earth's magnetic field is closely linked with the magnetic flux patch situated at the core-mantle boundary. However, our understanding of the evolution of magnetic flux patches has been limited by the use of short-term instrumental data and discrete archeomagnetic data. In this paper, we reconstruct a similar to 4,000-year high-resolution full-vector paleomagnetic record from sediments in the Bohai Sea, China. Our findings reveal a clear contrast in the paleomagnetic variations between the middle and low latitudes of East Asia. We proposed that the Siberian flux intensity lobe likely played an important role in the observed paleomagnetic behavior discrepancy between the low- and mid-latitudes of East Asia. A multi-decadal resolution paleomagnetic record spanning approximately 4,000 years has been derived from sediments in the Bohai Sea, ChinaThe paleomagnetic behavior differs between middle and low latitudes across East Asia, indicating the variation of the Siberian flux lobeThe disparity in inclination between the Chinese and Levantine spikes implies that these spikes arise from separate magnetic flux patches
资助机构	National Natural Science Foundation of China ; Shenzhen Science and Technology Program ; Science and Technology Innovation Committee of Shenzhen Municipality ; Technology and Innovation Commission of Shenzhen Municipality ; Southern University of Science and Technology ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Shanghai Sheshan National Geophysical Observatory (Shanghai, China)
收录类别	SCI
语种	英语
关键词[WOS]	PALEOMAGNETIC SECULAR VARIATION ; REMANENT MAGNETIZATION ; BOHAI SEA ; HOLOCENE ; SEDIMENTS ; CHINA ; PALEOINTENSITY ; BEHAVIORS ; RECORDS ; MODEL
研究领域[WOS]	Geochemistry & Geophysics
WOS记录号	WOS:001130126000001
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/33124
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
通讯作者	Chou, Yu-Min; Liu, Qingsong
作者单位	1.Southern Univ Sci & Technol, Ctr Marine Magnetism CM2, Dept Ocean Sci & Engn, Shenzhen, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China 3.CY Cergy Paris Univ, Lab Geosci & Environm Cergy GEC, Neuville Sur Oise, France 4.Sheshan Earthquake Monitoring Ctr Stn Shanghai Sei, Shanghai, Peoples R China 5.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou, Peoples R China 6.Shanghai Sheshan Natl Geophys Observ, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Li, Hai,Tang, Jianhui,Gai, Congcong,et al. Persistent Influence of Non-Dipole Geomagnetic Field on East Asia Over the Past 4,000 Years[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2023,128(12):17.
APA	Li, Hai.,Tang, Jianhui.,Gai, Congcong.,Zhang, Weijie.,Humbert, Fabien.,...&Liu, Qingsong.(2023).Persistent Influence of Non-Dipole Geomagnetic Field on East Asia Over the Past 4,000 Years.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,128(12),17.
MLA	Li, Hai,et al."Persistent Influence of Non-Dipole Geomagnetic Field on East Asia Over the Past 4,000 Years".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 128.12(2023):17.