Field-Aligned Currents at the PSBL on 17 August 2001 Storm: Relationships with solar Wind Conditions
CHENG Zheng-Wei1**, SHI Jian-Kui1, ZHANG Tie-Long2, WANG Sheng-Guo3, LIU Zhen-Xing1
1State Key Laboratory of Space Weather, CSSAR/CAS, Beijing 100190 2Space Research Institute, Austrian Academy of Sciences, Graz, Austria 3Beijing Institute of Applied Meteorology, Beijing 100083
Field-Aligned Currents at the PSBL on 17 August 2001 Storm: Relationships with solar Wind Conditions
CHENG Zheng-Wei1**, SHI Jian-Kui1, ZHANG Tie-Long2, WANG Sheng-Guo3, LIU Zhen-Xing1
1State Key Laboratory of Space Weather, CSSAR/CAS, Beijing 100190 2Space Research Institute, Austrian Academy of Sciences, Graz, Austria 3Beijing Institute of Applied Meteorology, Beijing 100083
摘要Using magnetic field and plasma data acquired with Cluster spacecrafts, we investigate the relationship between the field-aligned currents (FACs) at the plasma sheet boundary layer (PSBL) and solar wind dynamic pressure, as well as the interplanetary magnetic field (IMF) By on 17 August 2001 storm. Our studies reveal that FAC density at the PSBL in the magnetotail in the storm time is controlled mainly by the solar wind dynamic pressure rather than IMF By. The FACs at the PSBL are associated with the low−altitude region-1 current and have the same polarity as region-1 current in the dawn sector. In the polar region, the footprints of the FACs at the PSBL expand equatorward. The data analysis also shows that a very strong FAC with a density over 40 nA⋅m−2 appeared in this storm time when a substorm just occurred.
Abstract：Using magnetic field and plasma data acquired with Cluster spacecrafts, we investigate the relationship between the field-aligned currents (FACs) at the plasma sheet boundary layer (PSBL) and solar wind dynamic pressure, as well as the interplanetary magnetic field (IMF) By on 17 August 2001 storm. Our studies reveal that FAC density at the PSBL in the magnetotail in the storm time is controlled mainly by the solar wind dynamic pressure rather than IMF By. The FACs at the PSBL are associated with the low−altitude region-1 current and have the same polarity as region-1 current in the dawn sector. In the polar region, the footprints of the FACs at the PSBL expand equatorward. The data analysis also shows that a very strong FAC with a density over 40 nA⋅m−2 appeared in this storm time when a substorm just occurred.
CHENG Zheng-Wei**;SHI Jian-Kui;ZHANG Tie-Long;WANG Sheng-Guo;LIU Zhen-Xing
. Field-Aligned Currents at the PSBL on 17 August 2001 Storm: Relationships with solar Wind Conditions[J]. 中国物理快报, 2011, 28(9): 99401-099401.
CHENG Zheng-Wei**, SHI Jian-Kui, ZHANG Tie-Long, WANG Sheng-Guo, LIU Zhen-Xing
. Field-Aligned Currents at the PSBL on 17 August 2001 Storm: Relationships with solar Wind Conditions. Chin. Phys. Lett., 2011, 28(9): 99401-099401.
[1] Zmuda A J et al 1966 J. Geophys. Res. 71 5033
[2] Cummings W D and Dessler A J 1967 J. Geophys. Res. 72 1007
[3] Iijima T and Potemra T A 1976 J. Geophys. Res. 72 2165
[4] Iijima T and Potemra T A 1982 Geophys. Res. Lett. 9 442
[5] Stauning P 1994 J. Geophys. Res. 99 17309
[6] Xu D A and Kivelson M G 1995 J. Geophys. Res. 100 1837
[7] Wang H et al 2007 Chin. Sci. Bull. 52 248
[8] Iijima T et al 1984 J. Geophys. Res. 89 7441
[9] Iijima T and Shibaji T 1987 J. Geophys. Res. 92 2408
[10] Ogino T et al 1985 J. Geophys. Res. 90 10835
[11] Rich F J et al 1990 J. Geophys. Res. 95 7893
[12] Yamauchi M 1989 J. Geophys. Res. 94 2684
[13] Taguchi S 1992 J. Geophys. Res. 97 12231
[14] Zhou X W et al 2000 J. Geophys. Res. 105 2533
[15] Watanabe M and Iijima T 1996 J. Geophys. Res. 101 13303
[16] Kustov A V et al 2000 J. Geophys. Res. 105 205
[17] Ueno G et al 2002 J. Geophys. Res. 107 1399
[18] Cheng Z W et al 2007 Chin. Phys. Lett. 24 1125
[19] Baumjohann W and Paschmann G 1987 Physica Scripta T 18 61
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