Day-to-Day Variability of the Semidiurnal Tide in the F-Region Ionosphere During the January 2021 SSW From COSMIC-2 and ICON
© 2022. The Authors.
| Veröffentlicht in: | Geophysical research letters. - 1984. - 49(2022), 17 vom: 16. Sept., Seite e2022GL100369 |
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| 1. Verfasser: | |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2022
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| Zugriff auf das übergeordnete Werk: | Geophysical research letters |
| Schlagworte: | Journal Article COSMIC‐2 F‐region tides Northern Annual Mode polar vortex sudden stratospheric warmings tidal weather |
| Zusammenfassung: | © 2022. The Authors. The semidiurnal tidal spectrum in the F-region ionosphere obtained from hourly COSMIC-2 Global Ionospheric Specification (GIS) data assimilation is greatly (>50%) enhanced during the January 2021 Sudden Stratospheric Warming (SSW). Moreover, the semidiurnal migrating tidal response in topside electron densities closely follows the day-to-day changes of the 10 hPa, 60°N zonal wind from MERRA-2 during the SSW. The response is similar in the northern and southern crests of the Equatorial Ionization Anomaly (EIA) but persists toward higher magnetic latitudes and the EIA trough. A slight phase shift toward earlier local times is consistent with theoretical expectations of an E-region dynamo driving and agrees with semidiurnal tidal diagnostics of MIGHTI/ICON zonal winds at 105 km. COSMIC-2 GIS are the first data set to resolve the tidal weather of the ionosphere on a day-to-day basis and, therefore, provide a new perspective on space weather variability driven by lower and middle atmosphere dynamics |
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| Beschreibung: | Date Revised 05.09.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 0094-8276 |
| DOI: | 10.1029/2022GL100369 |