On the Driver of Daytime Pc3 Auroral Pulsations
On the Driver of Daytime Pc3 Auroral Pulsations
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论白天 Pc3 极光脉动的驱动因素
DOI:
10.1029/2018gl080842
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发表时间:
2019
影响因子:
5.2
通讯作者:
Weatherwax, A. T.
中科院分区:
文献类型:
--
作者:
Motoba, T.;Ebihara, Y.;Ogawa, Y.;Kadokura, A.;Engebretson, M. J.;Angelopoulos, V.;Gerrard, A. J.;Weatherwax, A. T.
Pc3 range frequency (22–100 mHz) auroral pulsations often occur at daytime high latitudes, equatorward of the cusp/cleft and typically map to the dayside outer magnetosphere. In this paper we present simultaneous observations of compressional Pc3 magnetic pulsations in the dayside outer magnetosphere that occurred in direct association with daytime Pc3 auroral pulsations at South Pole Station (−74.4° magnetic latitude). The pulsations were almost identical at the two locations, and their correlation was clearest when the magnetospheric pulsations were highly monochromatic. Lower‐band chorus waves and keV electron fluxes were also modulated in the Pc3 range, likely by the compressional magnetic pulsations. The common Pc3 frequency in the magnetosphere and aurora matched well with the predicted frequency of upstream ultralow frequency waves. These results provide the first compelling evidence for the direct dayside outer magnetosphere‐ionosphere linkage between upstream‐generated compressional Pc3 waves, Pc3 range modulations of chorus waves and keV electrons, and Pc3 auroral pulsations.
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DOI:
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发表时间:
1999
期刊:
影响因子:
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作者:
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1992
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1980
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1990
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发表时间:
1990
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通讯作者:
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