An investigation into the impact of the typhoon on the ionosphere over the point with maximum wind speed during a tropical cyclone


Freeshah M., Zhang X., Şentürk E. , Ren X., Chen J., Adil M. A. , ...More

International Graduate Workshop on GeoInformatics (IGWG) 2020, Wuhan, China, 16 - 18 December 2020, pp.1

  • Publication Type: Conference Paper / Summary Text
  • City: Wuhan
  • Country: China
  • Page Numbers: pp.1

Abstract

North West Pacific Ocean is one of the most regions heavily affected by tropical cyclones. Mangkhut Typhoon took place in September 2017, causing extensive damage in Guam, the Philippines, and South China. In this paper, we analyze the ionospheric perturbations and sea level pressure anomalies during an extremely typhoon. First, we created regional ionospheric maps (RIMs) through Hong Kong CORS and IGS data around the Typhoon. Then, the ionospheric response over the maximum wind speed points (maximum spots) before, during, and after the typhoon was checked. To distinguish whether the ionosphere response to the typhoon Mangkhut, the solar-terrestrial environment and geomagnetic storm indices were taken into consideration. The total electron content (TEC) time sequences over the point of the maximum wind speed are detected by Ten days average (TDA) method during super typhoon Mangkhut. The research findings indicating that significant ionospheric variations are detected over the points of maximum wind speed during powerful tropical cyclones within a few hours before the extreme wind speed. All the ionospheric variations are positive values. The highest ionospheric TEC disturbance amplitude can be observed when the low-pressure cell covers the largest area. Furthermore, the maximum ionospheric perturbations do not coincide with the center of the storm but are detected in the area close to the typhoon edges.