Publication Date:
2017-01-27
Description:
Concentric traveling ionosphere disturbances (CTIDs) in total electron content (TEC) triggered by Super Typhoon Meranti on 13 September 2016 are detected using the ground-based Global Navigation Satellite System (GNSS) network in Taiwan. The CTIDs emanated outwards before the typhoon landfall and lasted for more than 10 hours. The characteristics of CTIDs agree with the gravity wave theory and exhibit spatial and temporal scales in wave periods of ~8–30 minutes, horizontal wavelengths of ~160–200 km, and horizontal phase velocities of ~106–220 m/s. We also observe the CTIDs showing the stationary wave character. Broad spectra of CTIDs are excited after the rainbands of typhoon impinged on Central Mountain Range (CMR) of Taiwan. The ray-tracing technique confirms that the CTIDs were excited by convective clouds, spiral rainbands and the eyewall of Typhoon Meranti. This study provides new evidence of typhoon-induced concentric gravity waves in the ionosphere.
Print ISSN:
0094-8276
Electronic ISSN:
1944-8007
Topics:
Geosciences
,
Physics
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