Preprints
https://doi.org/10.5194/angeo-2020-68
https://doi.org/10.5194/angeo-2020-68

  17 Feb 2021

17 Feb 2021

Review status: this preprint is currently under review for the journal ANGEO.

Simulation of Gravity Wave D-region disturbance and its effect on the LWPC simulated VLF signal

Abdellatif Benchafaa1, Samir Nait Amor2, and Ghazali Mebarki3 Abdellatif Benchafaa et al.
  • 1Department of physic, Faculty of science, University of Batna1, Algeria
  • 2Center for Research in Astronomy Astrophysics and Geophysics, Algeria
  • 3LESEI Laboratory, Department of Mechanical engineering, Faculty of Technology, University of Batna 2, Algeria

Abstract. In this work we show the result of the numerical simulation of the gravity waves (GWs) D region disturbance. Effectively, using the Glukhov-Pasko-Inan (GPI) model of the electron density in the D region we were figured out the response of the electron density due to gravity wave neutral atmosphere oscillation. As a consequence to the D region disturbance, the electron density sometimes increases when the neutral atmosphere density decreases and vice versa. This behavior was interpreted by the decreases or increases of ionization rate by chemical loss process. In a second simulation work, we used the Long Wave Propagation Capability (LWPC) code to simulate the Very Low Frequency (VLF) signal when the gravity wave disturbance crossed the VLF path. The effect of the disturbance is to decrease the VLF signal reflection height below the ambient altitude (87 km) when the electron density increases. On the other hand and when the electron density drops, the VLF reflection altitude increased higher than 87 km.

Abdellatif Benchafaa et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2020-68', Anonymous Referee #1, 24 Mar 2021
    • AC1: 'Reply on RC1', Abdellatif Benchafaa, 05 Apr 2021
  • RC2: 'Comment on angeo-2020-68', Anonymous Referee #2, 04 May 2021

Abdellatif Benchafaa et al.

Abdellatif Benchafaa et al.

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Short summary
The gravity waves reach and effect the ionosphere. These waves start in the lower layers of the atmosphere and rise until the ionosphere and their effect increases due to the decrease in density. The ionosphere is the responsible for the reflection of the electromagnetic signals. Among them Very Low Frequency signals which provide us with information about the weather. This study enables us to determine the variation in the (VLF) signals, and we also adopted the simulations to accomplish it.