DOI: 10.1029/2017JA024912
Scopus记录号: 2-s2.0-85046739655
论文题名: ELF Whistler Dependence on a Sunlit Ionosphere
作者: Fritz B.A. ; Heavisides J. ; Young M.A. ; Kim H. ; Lessard M.R.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 5 起始页码: 3955
结束页码: 3964
语种: 英语
英文关键词: ELF whistler
; ionosphere
英文摘要: Narrow bandwidth, whistler-like spectral features in the extremely low frequency (ELF) range were recorded at South Pole Station over the duration of 2004. A full year of observation shows a distinct lack of activity over the Antarctic winter season. A calculation of solar zenith angle at the time of detection illustrates a connection between the occurrence of ELF whistlers and a sunlit ionosphere. ELF whistlers detected at low latitude follow a similar general trend between ELF whistler occurrence rate and changing solar zenith angle, but with an additional persistence of detections after local sunset. Temporal profiles from the International Reference Ionosphere 2016 show that the peaks in ELF whistler occurrence align with times of changing ionospheric composition. Correlation with solar activity per the F10.7 index shows no connection to daily variations in activity, and the consistency of solar flux levels throughout 2004 appears insufficient to explain the absence of events during the winter blackout. These observations place new physical constraints on the conditions necessary for detecting ELF whistlers and suggest the potential for localized generating mechanisms due to plasma instabilities in the ionosphere. ©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/113914
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, University of New Hampshire, Durham, NH, United States; Center for Space Physics, Boston University, Boston, MA, United States; Center for Solar-Terrestrial Research, New Jersey Institute of Technology, Newark, NJ, United States
Recommended Citation:
Fritz B.A.,Heavisides J.,Young M.A.,et al. ELF Whistler Dependence on a Sunlit Ionosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(5)