DOI: 10.1002/grl.50593
论文题名: Global statistical evidence for chorus as the embryonic source of plasmaspheric hiss
作者: Meredith N.P. ; Horne R.B. ; Bortnik J. ; Thorne R.M. ; Chen L. ; Li W. ; Sicard-Piet A.
刊名: Geophysical Research Letters
ISSN: 0094-8835
EISSN: 1944-8566
出版年: 2013
卷: 40, 期: 12 起始页码: 2891
结束页码: 2896
语种: 英语
英文关键词: chorus
; plasmaspheric hiss
Scopus关键词: chorus
; Earth's magnetic field
; Electromagnetic emissions
; Equatorial regions
; Frequency ranges
; Outer radiation belt
; plasmaspheric hiss
; Statistical evidence
; Earth sciences
; Geophysics
; Radiation belts
; atmospheric electricity
; decadal variation
; latitude
; magnetic field
; plasma
; radiation budget
; satellite data
英文摘要: The origin of plasmaspheric hiss, the electromagnetic emission responsible for the gap between the inner and outer radiation belts, has been debated for over four decades. Recently, a new theory proposed that chorus, which is excited in the equatorial region outside the plasmapause, can propagate to low altitudes on the dayside and evolve into plasmaspheric hiss. Here we combine data from six satellites and show that chorus extends along the Earth's magnetic field to high latitudes in the prenoon sector, and, in the equatorial region, there is a clear gap of the order of 1-2 Earth radii between plasmaspheric hiss at L-<4 and chorus further out, consistent with ray tracing modeling from a chorus source. Our observations confirm two of the key predictions of the new theory and provide the first statistical evidence for chorus as the embryonic source of plasmaspheric hiss. Key Points Intense chorus extends to high latitudes in the pre-noon sector. There is a gap between equatorial hiss at L<4 and equatorial chorus further out. Source of hiss is chorus in the frequency range 0.1-0.3fce. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880553234&doi=10.1002%2fgrl.50593&partnerID=40&md5=faffda8a65b4557dfbbb8ea9d13742ac
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6099
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, Madingley Road, Cambridge CB3 0ET, United Kingdom
Recommended Citation:
Meredith N.P.,Horne R.B.,Bortnik J.,et al. Global statistical evidence for chorus as the embryonic source of plasmaspheric hiss[J]. Geophysical Research Letters,2013-01-01,40(12).