DOI: 10.1029/2017JA025137
Scopus记录号: 2-s2.0-85050892143
论文题名: Whistler Influence on the Overall Very Low Frequency Wave Intensity in the Upper Ionosphere
作者: Záhlava J. ; Němec F. ; Pincon J.L. ; Santolík O. ; Kolmašová I. ; Parrot M.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 7 起始页码: 5648
结束页码: 5660
语种: 英语
英文关键词: DEMETER
; lightning activity
; whistler mode
英文摘要: We investigate the influence of lightning-generated whistlers on the overall intensity of electromagnetic waves measured by the Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions spacecraft (2004–2010, quasi Sun-synchronous polar orbit with an altitude of about 700 km) at frequencies below 18 kHz. Whistler occurrence rate evaluated using an onboard neural network designed for automated whistler detection is used to distinguish periods of high and low whistler occurrence rates. It is shown that especially during the night and particularly in the frequency-geomagnetic latitude intervals with a low average wave intensity, contribution of lightning-generated whistlers to the overall wave intensity is significant. At frequencies below 1 kHz, where all six electromagnetic wave components were measured during specific intervals, the study is accompanied by analysis of wave propagation directions. When we limit the analysis only to fractional-hop whistlers, which propagate away from the Earth, we find a reasonable agreement with results obtained from the whole data set. This also confirms the validity of the whistler occurrence rate analysis at higher frequencies. ©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/113639
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic; LPC2E/CNRS, Orléans, France; Department of Space Physics, Institute of Atmospheric Physics, The Czech Academy of Sciences, Prague, Czech Republic
Recommended Citation:
Záhlava J.,Němec F.,Pincon J.L.,et al. Whistler Influence on the Overall Very Low Frequency Wave Intensity in the Upper Ionosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)