Articles | Volume 16, issue 5
Research article
14 Mar 2016
Research article |  | 14 Mar 2016

Semi-annual oscillation (SAO) of the nighttime ionospheric D region as detected through ground-based VLF receivers

Israel Silber, Colin Price, and Craig J. Rodger


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Israel Silber on behalf of the Authors (17 Jan 2016)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (18 Jan 2016) by Franz-Josef Lübken
RR by Anonymous Referee #1 (31 Jan 2016)
RR by Anonymous Referee #2 (17 Feb 2016)
ED: Publish subject to technical corrections (01 Mar 2016) by Franz-Josef Lübken
AR by Israel Silber on behalf of the Authors (01 Mar 2016)  Author's response    Manuscript
Short summary
We report for the first time that the semi-annual oscillation (SAO) is one of the dominant oscillations in the nighttime lower ionosphere, using ground-based measurements of VLF signals reflected off the lower part of the ionosphere. We conclude that the origins of this oscillation are oscillatory changes of the D region's electrical characteristics, driven by NOx transport from the lower thermosphere. This oscillation should be considered in lower ionospheric and VLF wave propagation models.
Final-revised paper