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

李海1; 唐建辉2; 盖聪聪1; 张伟杰1; Fabien Humbert1,3; 倪友忠4; 周祐民1,5; 刘青松1,5,6

2023-12-09

10.1029/2023JB027359

Journal of Geophysical Research: Solid Earth   影响因子和分区

2169-9313

2169-9356

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 C 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.

SCI

英语

NI论文

第一 ; 通讯

GEOSCIENCES

2-s2.0-85181227535

人工提交

1.Centre for Marine Magnetism (CM2), Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, China
2.key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
3.Laboratoire Géosciences et Environnement Cergy (GEC), CY Cergy Paris Université, Neuville sur Oise, France
4.Sheshan Earthquake Monitoring Center Station of Shanghai Seismological Bureau, Shanghai, China
5.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
6.Shanghai Sheshan National Geophysical Observatory, Shanghai, China

Li H,Tang JH,Gai CC,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):e2023JB027359.

李海.,唐建辉.,盖聪聪.,张伟杰.,Fabien Humbert.,...&刘青松.(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),e2023JB027359.

李海,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):e2023JB027359.