DOI: 10.1002/2017JA025036
Scopus记录号: 2-s2.0-85042135080
论文题名: Hindcasting of Equatorial Spread F Using Seasonal Empirical Models
作者: Aswathy R.P. ; Manju G.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 2 起始页码: 1515
结束页码: 1524
语种: 英语
英文关键词: empirical model
; equatorial spread F
; gravity wave
; ionosphere
; seed perturbation
英文摘要: The role of gravity waves in modulating equatorial spread F (ESF) day-to-day variability is investigated using ionosonde data at Trivandrum (geographic coordinates, 8.5°N, 77°E; mean geomagnetic latitude −0.3°N) a magnetic equatorial location. A novel empirical model that incorporates the combined effects of electrodynamics and gravity waves in modulating ESF occurrence during autumnal equinox season was presented by Aswathy and Manju (2017). In the present study, the height variations of the requisite gravity wave seed perturbations for ESF are examined for the vernal equinoxes, summer solstices, and winter solstices of different years. Subsequently, the empirical model, incorporating the electrodynamical effects and the gravity wave modulation, valid for each of the seasons is developed. Accordingly, for each season, the threshold curve may be demarcated provided the solar flux index (F10.7) is known. The empirical models are validated using the data for high, moderate, and low solar activity years corresponding to each season. In the next stage, this model is to be fine tuned to facilitate the prediction of ESF well before its onset. ©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/114557
Appears in Collections: 气候减缓与适应
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作者单位: Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, India
Recommended Citation:
Aswathy R.P.,Manju G.. Hindcasting of Equatorial Spread F Using Seasonal Empirical Models[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(2)