Ionospheric Plasma Convection in the Midnight Sector for Northward Interplanetary Magnetic Field.
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- Taguchi S.
- Laboratory for Extraterrestrial Physics, NASA/GSFC
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- Hoffman R. A.
- Laboratory for Extraterrestrial Physics, NASA/GSFC
書誌事項
- タイトル別名
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- Ionospheric Plasma Convection in the Mi
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The ionospheric plasma convection in the midnight sector for stably northward interplanetary magnetic field (IMF) has been examined using the Dynamics Explorer 2 fields and plasma data. From the 12-months of noon-midnight passes, 67 passes were selected. With the electric field data from these passes, we have focused on the convection occurring in the “boundary plasma region.” The boundary plasma region is defined as a region between the equatorward boundary of the polar cap and the poleward boundary of a central/inner plasma sheet. The convection pattern in the boundary plasma region is controlled by the sign of IMF BY, the magnitude of (BY2 + BZ2)1/2 and the IMF clock angle. For a large IMF (BY2 +BZ2)1/2 and relatively large IMF clock angles (i.e., larger than 30°), the convection tends to show a By-dependent flow pattern which consists of two or three flow regions having an eastward or westward component. As the clock angle becomes smaller, the convection tends to be an irregular pattern which has multiple flow regions. Large potential difference can occur in the boundary plasma region. When the potential is more than 15 kV, the convection, in most cases, is the BY-controlled pattern. This means that for this convection pattern a significant amount of energy can be deposited in the midnight sector from the tail even if IMF BZ is stably positive.
収録刊行物
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- Journal of geomagnetism and geoelectricity
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Journal of geomagnetism and geoelectricity 48 (5/6), 925-933, 1996
地球電磁気・地球惑星圏学会
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詳細情報 詳細情報について
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- CRID
- 1390001206510519552
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- NII論文ID
- 130003559436
- 10002403994
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- NII書誌ID
- AA00698879
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- ISSN
- 21855765
- 00221392
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- NDL書誌ID
- 4060383
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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