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Effects of the Laschamps Excursion on Geomagnetic Cutoff Rigidities

文献类型：期刊论文

作者Gao, Jiawei1,2,3; Korte, Monika1; Panovska, Sanja1; Rong, Zhaojin2,3; Wei, Yong2,3
刊名GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
出版日期2022-02-01
卷号23期号:2页码:20
关键词geomagnetic field paleomagnetic field cutoff rigidity cosmic ray Laschamps excursion energetic particle
DOI10.1029/2021GC010261
英文摘要Today's geomagnetic field can prevent energetic particles, including solar energetic particles and galactic cosmic rays, from directly hitting the Earth's atmosphere. However, when the geomagnetic field strength is significantly decreased during geomagnetic field excursions or reversals, the geomagnetic field shielding effect becomes less prominent. Geomagnetic cutoff rigidity, as a quantitative estimation of the shielding effect, can be calculated using trajectory tracing or theoretical equations. We use a recent high-resolution continuous geomagnetic field model (LSMOD.2) to study the geomagnetic cutoff rigidity during the Laschamps excursion. Global grids of the geomagnetic cutoff rigidities are presented, in particular for the excursion midpoint when the geomagnetic field is weak and not dipole-dominated anymore at Earth's surface. We compare the cutoff rigidity calculation results between a trajectory tracing program and theoretical equations and we find that the influence of the non-dipole component of the geomagnetic field cannot be ignored during the excursion. Our results indicate that the exposure of Earth's atmosphere to energetic particles of cosmic and solar origin is high and nearly independent of latitude in the middle of the Laschamps excursion. Our results will be useful for future studies associated with cosmic radiation dose rate and cosmogenic isotope production rate during the Laschamps excursion.
WOS关键词COSMOGENIC NUCLIDE PRODUCTION ; COSMIC-RAY ; PRODUCTION-RATES ; MAGNETIC-FIELD ; MODELS ; RADIATION ; EARTH ; C-14 ; SUN
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; National Natural Science Foundation of China[41922031] ; National Natural Science Foundation of China[41774188] ; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-201904] ; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-202102] ; Key Research Program of Chinese Academy of Sciences[ZDBS-SSW-TLC00103] ; China Scholarship Council[202004910583] ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; Projekt DEAL
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000765651700021
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; WOA Institution: N/A Blended DEAL: Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL ; Projekt DEAL
源URL[http://ir.iggcas.ac.cn/handle/132A11/104966]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Gao, Jiawei
作者单位1.GFZ German Res Ctr Geosci, Potsdam, Germany
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Jiawei,Korte, Monika,Panovska, Sanja,et al. Effects of the Laschamps Excursion on Geomagnetic Cutoff Rigidities[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2022,23(2):20.
APA Gao, Jiawei,Korte, Monika,Panovska, Sanja,Rong, Zhaojin,&Wei, Yong.(2022).Effects of the Laschamps Excursion on Geomagnetic Cutoff Rigidities.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,23(2),20.
MLA Gao, Jiawei,et al."Effects of the Laschamps Excursion on Geomagnetic Cutoff Rigidities".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 23.2(2022):20.

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来源：地质与地球物理研究所

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