DOI: 10.1029/2017JA025164
Scopus记录号: 2-s2.0-85050265730
论文题名: Seasonal Variability of the Midlatitude Traveling Ionospheric Disturbances From Wallops Island, VA, Dynasonde Data: Evidence of a Semiannual Variation
作者: Negrea C. ; Zabotin N. ; Bullett T.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 6 起始页码: 5047
结束页码: 5054
语种: 英语
英文关键词: Dynasonde technique
; seasonal variability of TIDs
; semiannual variation
英文摘要: We investigate the ionospheric variability due to traveling ionospheric disturbances (TIDs) over Wallops Island, VA, using Dynasonde-derived measurements of ionospheric tilts and vertical Doppler speed between May 2013 and August 2016, covering the bottomside ionospheric F layer. The mean power spectral density is determined separately for each month for both ionospheric tilts and for the Doppler speed, with a 2 km resolution in a broad altitude range. This is accomplished using a spectral analysis technique based on the Lomb-Scargle and Welch methods, with an added filtering criterion. The analysis is performed separately for the daytime and nighttime data. By investigating the seasonal variability of the power spectral density integral, a semiannual variation is highlighted in the overall level of daytime TID activity, with increased activity during summer and winter seasons in the northern hemisphere. This result provides a more complete picture than other recent publications that only highlighted a winter peak in the same geographical sector. Finally, the relative amplitude of the two peaks in TID activity is shown to vary significantly during the three years investigated and also as a function of the altitude. ©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/113811
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Space Science, Măgurele, Romania; Department of Electrical and Computer Engineering, University of Colorado Boulder, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; NOAA NCEI, Boulder, CO, United States
Recommended Citation:
Negrea C.,Zabotin N.,Bullett T.. Seasonal Variability of the Midlatitude Traveling Ionospheric Disturbances From Wallops Island, VA, Dynasonde Data: Evidence of a Semiannual Variation[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)