DOI: 10.1029/2018JA025226
Scopus记录号: 2-s2.0-85050284290
论文题名: Global Model of Plasmaspheric Hiss From Multiple Satellite Observations
作者: Meredith N.P. ; Horne R.B. ; Kersten T. ; Li W. ; Bortnik J. ; Sicard A. ; Yearby K.H.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 6 起始页码: 4526
结束页码: 4541
语种: 英语
英文关键词: Plasmasphere
; Plasmaspheric Hiss
; Radiation Belts
英文摘要: We present a global model of plasmaspheric hiss, using data from eight satellites, extending the coverage and improving the statistics of existing models. We use geomagnetic activity dependent templates to separate plasmaspheric hiss from chorus. In the region 22–14 magnetic local time (MLT) the boundary between plasmaspheric hiss and chorus moves to lower values with increasing geomagnetic activity. The average wave intensity of plasmaspheric hiss is largest on the dayside and increases with increasing geomagnetic activity from midnight through dawn to dusk. Plasmaspheric hiss is most intense and spatially extended in the 200 to 500 Hz frequency band during active conditions, 400 750 nT, with an average intensity of 1,128 pT in the region 05–17 MLT from 1.5. In the prenoon sector, waves in the 100 to 200 Hz frequency band peak near the magnetic equator and decrease in intensity with increasing magnetic latitude, inconsistent with a source from chorus outside the plasmapause, but more consistent with local amplification by substorm-injected electrons. At higher frequencies the average wave intensities in this sector exhibit two peaks, one near the magnetic equator and one at high latitudes, 45° °, with a minimum at intermediate latitudes, 30° °, consistent with a source from chorus outside the plasmapause. In the premidnight sector, the intensity of plasmaspheric hiss in the frequency range 50 < f < 1,000 Hz decreases with increasing geomagnetic activity. The source of this weak premidnight plasmaspheric hiss is likely to be chorus at larger in the postnoon sector that enters that plasmasphere in the postnoon sector and subsequently propagates eastward in MLT. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113819
Appears in Collections: 气候减缓与适应
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作者单位: British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom; Center for Space Physics, Boston University, Boston, MA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Office National d'Etudes et Recherches Aérospatiales, Toulouse, France; Department of ACSE, University of Sheffield, United Kingdom
Recommended Citation:
Meredith N.P.,Horne R.B.,Kersten T.,et al. Global Model of Plasmaspheric Hiss From Multiple Satellite Observations[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)