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  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院地球与行星物理重点实验室
Geomagnetic field shielding over the last one hundred thousand years

文献类型：期刊论文

作者Gao, Jiawei1,2,3; Korte, Monika2; Panovska, Sanja2; Rong, Zhaojin1,3; Wei, Yong1,3
刊名JOURNAL OF SPACE WEATHER AND SPACE CLIMATE
出版日期2022-09-09
卷号12页码:15
ISSN号2115-7251
关键词Geomagnetic field cosmic ray cutoff rigidity excursion energetic particles
DOI10.1051/swsc/2022027
英文摘要The geomagnetic field prevents energetic particles, such as galactic cosmic rays, from directly interacting with the Earth's atmosphere. The geomagnetic field is not static but constantly changing, and over the last 100,000 years, several geomagnetic excursions occurred. During geomagnetic field excursions, the field strength is significantly decreased and the field morphology is strongly influenced by non-dipole components, and more cosmic ray particles can access the Earth's atmosphere. Paleomagnetic field models provide a global view of the long-term geomagnetic field evolution, however, with individual spatial and temporal resolution and uncertainties. Here, we reconstruct the geomagnetic shielding effect over the last 100,000 years by calculating the geomagnetic cutoff rigidity using four global paleomagnetic field models, i.e., the GGF100k, GGFSS70, LSMOD.2, and CALS10k.2 model. We compare results for overlapping periods and find that the model selection is crucial to constrain the cutoff rigidity variation. However, all models indicate that the non-dipole components of the geomagnetic field are not negligible for estimating the long-term geomagnetic shielding effect. We provide a combined record of global cutoff rigidities using the best available model for individual time intervals. Our results provide the possibility to estimate the cosmogenic isotope production rate and cosmic radiation dose rate covering the last 100,000 years according to the best current knowledge about geomagnetic field evolution, and will be useful in further long-term solar activity and climate change reconstruction.
WOS关键词PALEOSECULAR VARIATION ACTIVITY ; NUCLIDE PRODUCTION-RATES ; EARTHS MAGNETIC-FIELD ; COSMIC-RAY ; COSMOGENIC NUCLIDES ; CUTOFF RIGIDITIES ; SECULAR VARIATION ; MODELS ; EXCURSIONS ; RESOLUTION
资助项目Strategic Priority Research Program of the 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[IGGCAS201904] ; 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] ; GFZ Potsdam, Germany
WOS研究方向Astronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:000851941700001
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the 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 ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the 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 ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the 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 ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the 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 ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany ; GFZ Potsdam, Germany
源URL[http://ir.iggcas.ac.cn/handle/132A11/108379]  
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.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Jiawei,Korte, Monika,Panovska, Sanja,et al. Geomagnetic field shielding over the last one hundred thousand years[J]. JOURNAL OF SPACE WEATHER AND SPACE CLIMATE,2022,12:15.
APA Gao, Jiawei,Korte, Monika,Panovska, Sanja,Rong, Zhaojin,&Wei, Yong.(2022).Geomagnetic field shielding over the last one hundred thousand years.JOURNAL OF SPACE WEATHER AND SPACE CLIMATE,12,15.
MLA Gao, Jiawei,et al."Geomagnetic field shielding over the last one hundred thousand years".JOURNAL OF SPACE WEATHER AND SPACE CLIMATE 12(2022):15.

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来源：地质与地球物理研究所

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