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Relations of the energetic proton fluxes in the central plasma sheet with solar wind and geomagnetic activities
Cao, Jinbin; Duan, Aiying; Reme, Henri; Dandouras, Iannis; Cao, JB (reprint author), Beihang Univ, Sch Astronaut, Space Sci Inst, Beijing 100191, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2013
Volume118Issue:11Pages:7226-7236
ISSN2169-9380
Language英语
KeywordEnergetic Protons Central Plasma Sheet Solar Wind Substorm Geomagnetic Storm
AbstractIn this paper, using 9 years of Cluster data, we statistically investigate the relations of central plasma sheet energetic proton fluxes, similar to 30keV to 380keV, with the solar wind parameters and geomagnetic indexes. The energetic proton fluxes increase with increasing solar wind dynamical pressure and solar wind speed. The energetic proton fluxes are more correlated with solar wind dynamical pressure than with solar wind speed. During northward interplanetary magnetic field (IMF) Bz, energetic proton fluxes are independent of northward IMF Bz, while during southward IMF Bz, energetic proton fluxes are highly correlated with southward IMF Bz and increase with increasing |IMF Bz|. The response time of energetic proton flux to southward IMF Bz is between 40 and 100min. The energetic proton fluxes are correlated with plasma sheet ion temperature. The energetic proton fluxes increase with increasing indexes of Kp, AE, and |Dst|. Among the three geomagnetic indexes, the central plasma sheet energetic proton fluxes are most correlated with Kp index with the largest correlation coefficient being 0.82. The energetic proton fluxes are large during positive Dst index, suggesting that the sharp increase of solar wind dynamical pressure can enhance the plasma sheet energetic proton fluxes. The enhanced plasma sheet energetic proton fluxes may be important for geomagnetic storms and substorms since they can possibly directly become the source of ring current and substorm-injected energetic particles without the need of additional acceleration process in the inner magnetosphere.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4994
Collection空间科学部
Corresponding AuthorCao, JB (reprint author), Beihang Univ, Sch Astronaut, Space Sci Inst, Beijing 100191, Peoples R China.
Recommended Citation
GB/T 7714
Cao, Jinbin,Duan, Aiying,Reme, Henri,et al. Relations of the energetic proton fluxes in the central plasma sheet with solar wind and geomagnetic activities[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(11):7226-7236.
APA Cao, Jinbin,Duan, Aiying,Reme, Henri,Dandouras, Iannis,&Cao, JB .(2013).Relations of the energetic proton fluxes in the central plasma sheet with solar wind and geomagnetic activities.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(11),7226-7236.
MLA Cao, Jinbin,et al."Relations of the energetic proton fluxes in the central plasma sheet with solar wind and geomagnetic activities".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.11(2013):7226-7236.
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