Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7
The present study statistically examines the dependence of the intensities of dayside (MLT=8-12h) large-scale field-aligned currents (FACs) on the ionospheric conductance using the summary data of DMSP-F7 constructed by the procedure of Higuchi and Ohtani (2000). We have found that, in t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2004-09-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/22/2775/2004/angeo-22-2775-2004.pdf |
| _version_ | 1819055383958781952 |
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| author | K. Haraguchi H. Kawano K. Yumoto S. Ohtani T. Higuchi G. Ueno |
| author_facet | K. Haraguchi H. Kawano K. Yumoto S. Ohtani T. Higuchi G. Ueno |
| author_sort | K. Haraguchi |
| collection | DOAJ |
| description | The present study statistically examines the dependence of the intensities
of dayside (MLT=8-12h) large-scale field-aligned currents (FACs) on the
ionospheric conductance using the summary data of DMSP-F7 constructed by the
procedure of Higuchi and Ohtani (2000). We have found that, in the
dayside region, R1 and R0 have a higher correlation between ionospheric
conductivity and FAC intensity than R2, suggesting that R0 and R1 are driven
by a more voltage-like source than R2. This result is consistent with the
idea that R1 and R0 are driven by the interaction between the solar wind and
the open magnetospheric magnetic field. We have also found that dayside FAC
intensities are latitudinally well balanced when they have a three sheet
structure (R0, R1 and R2); on the other hand, for a two sheet structure (R1
and R2), the intensity of R1 is larger than that of R2, so that the net
current has the polarity of R1. |
| first_indexed | 2024-12-21T13:06:39Z |
| format | Article |
| id | doaj.art-3ff52635f79948898fcafe8410d8bd8f |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-21T13:06:39Z |
| publishDate | 2004-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-3ff52635f79948898fcafe8410d8bd8f2022-12-21T19:03:00ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762004-09-01222775278310.5194/angeo-22-2775-2004Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7K. Haraguchi0H. Kawano1K. Yumoto2S. Ohtani3T. Higuchi4G. Ueno5Department of Earth and Planetary Sciences, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, JapanDepartment of Earth and Planetary Sciences, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, JapanSpace Environment Research Center, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, JapanThe Johns Hopkins University Applied Physics Laboratory, Johns Hopkins Road, Laurel, MD 20723-6099, USAThe Institute of Statistical Mathematics, 4-6-7 Minami-Azabu, Minato-ku, Tokyo 106-8569, JapanThe Institute of Statistical Mathematics, 4-6-7 Minami-Azabu, Minato-ku, Tokyo 106-8569, JapanThe present study statistically examines the dependence of the intensities of dayside (MLT=8-12h) large-scale field-aligned currents (FACs) on the ionospheric conductance using the summary data of DMSP-F7 constructed by the procedure of Higuchi and Ohtani (2000). We have found that, in the dayside region, R1 and R0 have a higher correlation between ionospheric conductivity and FAC intensity than R2, suggesting that R0 and R1 are driven by a more voltage-like source than R2. This result is consistent with the idea that R1 and R0 are driven by the interaction between the solar wind and the open magnetospheric magnetic field. We have also found that dayside FAC intensities are latitudinally well balanced when they have a three sheet structure (R0, R1 and R2); on the other hand, for a two sheet structure (R1 and R2), the intensity of R1 is larger than that of R2, so that the net current has the polarity of R1.https://www.ann-geophys.net/22/2775/2004/angeo-22-2775-2004.pdf |
| spellingShingle | K. Haraguchi H. Kawano K. Yumoto S. Ohtani T. Higuchi G. Ueno Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7 Annales Geophysicae |
| title | Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7 |
| title_full | Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7 |
| title_fullStr | Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7 |
| title_full_unstemmed | Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7 |
| title_short | Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7 |
| title_sort | ionospheric conductivity dependence of dayside region 0 1 and 2 field aligned current systems statistical study with dmsp f7 |
| url | https://www.ann-geophys.net/22/2775/2004/angeo-22-2775-2004.pdf |
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