Ionospheric 14.5 Day Periodic Oscillation during the 2019 Antarctic SSW Event

The International Global Navigation Satellite Systems Service (IGS) ionospheric total electron content (TEC) data are used to study the periodic perturbation in the ionosphere during the 2019 Antarctic sudden stratospheric warming (SSW) event, a rare Southern Hemisphere minor SSW event in the last 4...

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Bibliographic Details
Published in:Atmosphere
Main Authors: Jinze Li, Qiong Tang, Yiyun Wu, Chen Zhou, Yi Liu
Format: Text
Language:English
Published: Multidisciplinary Digital Publishing Institute 2023
Subjects:
sudden stratospheric warming
IGS ionospheric total electron content
14.5 day periodic oscillation
Antarctic
Eia
Antarc*
Online Access:https://doi.org/10.3390/atmos14050796
Description
Summary:The International Global Navigation Satellite Systems Service (IGS) ionospheric total electron content (TEC) data are used to study the periodic perturbation in the ionosphere during the 2019 Antarctic sudden stratospheric warming (SSW) event, a rare Southern Hemisphere minor SSW event in the last 40 years. A 14.5 day periodic signal with a zonal wavenumber of 0 is observed in the mesosphere and the lower thermosphere (MLT) region and the ionosphere during this SSW period, which could be related to the lunar tide. The 14.5 day periodic disturbance in the IGS TEC exhibits local time dependence and latitudinal variation, with the maximum amplitude appearing between 1000 and 1600 LT in the equatorial ionization anomaly (EIA) crest regions. Additionally, the 14.5 day periodic oscillation shows an obvious longitudinal variability, with the weakest amplitude appearing in the longitudinal region of 30° W–60° E.

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