Impact of typhoon Vongfong 2014 on the ionosphere and geomagnetic field according to Swarm satellite data: 1. Wave disturbances of ionospheric plasma

Abstract

The article considers the influence of large atmospheric processes on the ionosphere by the example of tropical typhoon Vongfong 2014. We use data obtained from three SWARM satellite missions (450-500 km altitude). We discuss two possible mechanisms of transfer of atmospheric disturbances to ionospheric heights. The first mechanism is the generation of acoustic-gravity waves (AGWs); the second mechanism considers the excitation of electric fields in the atmosphere. We propose new techniques for detecting the ionospheric response to AGW, which rely on loworbit satellite data. The first technique is based on determination of relative electron density variations in the frequency band from 15 to 150-180 s, corresponding to certain scales of AGW. The second technique estimates space-time derivatives of the electron density, measured by two nearby SWARM satellites. We present and estimate the characteristic magnitudes of ionospheric response effects, their localization and spatial-temporal characteristics for the large tropical cyclone under study.

Statistical Relationship of Ionospheric Disturbances Caused by Typhoon Extinction on the Sea

“…This lead to a significant difference between ground‐based observations and satellites observations, and the satellites cannot observe the frequencies of AGWs and magnetohydrodynamics (MHD) waves. In addition, some scholars' research on typhoons through SWARM show that typhoon can cause Ne's amplitude changes about 5%–8%, magnetic amplitude changes about 0.5–1.5 nT, and magnetic disturbance frequency is about 0.1–0.5 Hz (Martines‐Bedenko et al., 2019; Zakharov & Sigachev, 2022; Zakharov et al., 2019).…”

“…Its frequency gradually transitions from high frequency to low frequency in the ionosphere. However, Zakharov et al (2019) point out that satellites is much faster than the propagation speed of AGWs, it is impossible for the satellite to observe the changes of AGWs wavelength and other parameters with time in the ionosphere. In addition, since the typhoons studied in this paper are all located on sea and ground-based observation data are few, the wavelength and other physical quantity are not discussed in this paper.…”

Disturbances in the Ionosphere and Distortion of Radio Wave Characteristics That Accompanied the Super Typhoon Lekima Event of 4–12 August 2019

“…Zakharov et al. (2019) used Swarm satellite data to study the impact of typhoon 201419 Vongfong on the geomagnetic field and the ionosphere; they showed that the Δ N/N values attained 10% and ∼10‐s period variations in the geomagnetic field reached 0.5–1.5 nT. Yiğit et al.…”

“…Isaev et al (2002Isaev et al ( , 2010 and Sorokin et al (2005) estimated the amplitude of the electric fields to be ∼25 mV/m. Zakharov et al (2019) used Swarm satellite data to study the impact of typhoon 201419 Vongfong on the geomagnetic field and the ionosphere; they showed that the ΔN/N values attained 10% and ∼10-s period variations in the geomagnetic field reached 0.5-1.5 nT. Yiğit et al (2016) presented a review of the effects of atmospheric-ionospheric coupling appearing due to various physical causes.…”