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Discussion papers | Copyright
https://doi.org/10.5194/angeo-2018-35
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 03 May 2018

Regular paper | 03 May 2018

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This discussion paper is a preprint. A revision of the manuscript is under review for the journal Annales Geophysicae (ANGEO).

Solar eclipse induced perturbations at mid-latitude during the 21 August 2017 event

Bolarinwa J. Adekoya1, Babatunde O. Adebesin2, Timothy W. David1, Stephen O. Ikubanni2, and Shola J. Adebiyi2 Bolarinwa J. Adekoya et al.
  • 1Department of Physics, Olabisi Onabanjo University, P.M.B. 2002, Ago Iwoye, Nigeria
  • 2Space Weather Group, Department of Physical Sciences, Landmark University, P.M.B 1001, Omu-Aran, Kwara State, Nigeria

Abstract. A study of the response of some ionospheric parameters and their relationship in predicting one another during the solar eclipse of 21 August 2017 is presented. Mid-latitude stations located along the eclipse path and with data availability on the GIRO database were selected. The percentage obscuration at these stations ranges between 63–100%. The decrease in electron density during the eclipse is attributed to reduction in solar radiation and natural gas heating. The maximum magnitude of the eclipse coincided with hmF2 increase and with a lagged maximum decrease in NmF2 consistently at the stations investigated. The results revealed that the horizontal neutral wind flow is as a consequence of the changes in the thermospheric and diffusion processes. The unusual increase/decrease in the shape/thickness parameters during the eclipse period relative to the control days points to the perturbation caused by the solar eclipse. Need for IRI model to capture eclipse caused perturbation

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Short summary
We present the dynamics of perturbations during a solar eclipse using rare parameters for eclipse study. Reduction in solar radiation and natural gas heating are the causal of the observed changes. The use of the bottomside F-layer parameters to probe the topside ionosphere established their interrelationship. Implication is that eclipse-caused perturbation could be better explained using some ionosonde parameters. Need for higher time resolution in IRI model to capture eclipse perturbations.
We present the dynamics of perturbations during a solar eclipse using rare parameters for...
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