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- T. P. O'Brien
- Institute of Geophysics and Planetary Physics University of California Los Angeles California USA
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- R. L. McPherron
- Institute of Geophysics and Planetary Physics University of California Los Angeles California USA
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- M. W. Liemohn
- Space Physics Research Laboratory University of Michigan Ann Arbor Michigan USA
書誌事項
- 公開日
- 2002-12
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2002gl015556
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>We test the hypothesis that abrupt cessation of solar wind driving results in a different recovery profile for <jats:italic>Dst</jats:italic> than does a slow cessation. The difference arises when abrupt cessation of convection causes a large portion of the asymmetric ring current to be trapped, whereas continued, weakened convection permits a rapid initial loss of ring current particles through the dayside magnetopause. Specifically, we compare the initial recovery of the hourly <jats:italic>Dst</jats:italic> index for storms with gradual versus abrupt northward turning of the interplanetary magnetic field (IMF). We consider only storms with minimum <jats:italic>Dst</jats:italic> between −150 nT and −300 nT. We show that storms with abrupt northward turnings show the same recovery in the first 6 hours or slightly more recovery than do the storms with gradual northward turnings. Our results contradict the hypothesis that the rate of northward turning (i.e., shutoff of convection) largely determines the initial rate of recovery in <jats:italic>Dst</jats:italic>.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 29 (23), 2143-, 2002-12
American Geophysical Union (AGU)
