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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국우주과학회 Journal of Astronomy and Space Sciences Journal of Astronomy and Space Sciences 제36권 제3호
- 발행연도
- 2019.1
- 수록면
- 133 - 147 (15page)
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Challenging Minisatellite Payload (CHAMP) satellite magnetic data are used to investigate the latitudinal variation of the storm-time meso-scale field-aligned currents by defining a new metric called the FAC range. Three major geomagnetic storm events are considered. Alongside SymH, the possible contributions from solar wind dynamic pressure and interplanetary magnetic field (IMF) BZ are also investigated. The results show that the new metric predicts the latitudinal variation of FACs better than previous studies. As expected, the equatorward expansion and poleward retreat are observed during the storm main phase and recovery phase respectively. The equatorward shift is prominent on the northern duskside, at ~58° coinciding with the minimum SymH and dayside at ~59° compared to dawnside and nightside respectively. The latitudinal shift of FAC range is better correlated to IMF BZ in northern hemisphere dusk-dawn magnetic local time (MLT) sectors than in southern hemisphere. The FAC range latitudinal shifts responds better to dynamic pressure in the duskside northern hemisphere and dawnside southern hemisphere than in southern hemisphere dusk sector and northern hemisphere dawn sector respectively. FAC range exhibits a good correlation with dynamic pressure in the dayside (nightside) southern (northern) hemispheres depicting possible electrodynamic similarity at day-night MLT sectors in the opposite hemispheres.
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참고문헌 (36)
참고문헌 신청
B. J. Anderson / 2005 / Storm time dawn-dusk asymmetry of the large-scale Birkeland currents / Journal of Geophysical Research 110(A12)
B. J. Anderson / 2002 / Birkeland current system key parameters derived from Iridium observations: Method and initial validation results / Journal of Geophysical Research 107(A6)
L. Benkevich / 2000 / Field-aligned currents between conjugate hemispheres / Journal of Geophysical Research: Space Physics 105(A12):27727~27737
A. Boudouridis / 2003 / Effect of solar wind pressure pulses on the size and strength of the auroral oval / Journal of Geophysical Research 108(A4)
J. L. Burch / 1985 / IMF B y -dependent plasma flow and Birkeland currents in the dayside magnetosphere: 1. Dynamics Explorer observations / Journal of Geophysical Research 90(A2):1577
B. J. Anderson / 2002 / Birkeland current system key parameters derived from Iridium observations: Method and initial validation results / Journal of Geophysical Research 107(A6)
L. Benkevich / 2000 / Field-aligned currents between conjugate hemispheres / Journal of Geophysical Research: Space Physics 105(A12):27727~27737
A. Boudouridis / 2003 / Effect of solar wind pressure pulses on the size and strength of the auroral oval / Journal of Geophysical Research 108(A4)
J. L. Burch / 1985 / IMF B y -dependent plasma flow and Birkeland currents in the dayside magnetosphere: 1. Dynamics Explorer observations / Journal of Geophysical Research 90(A2):1577
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