Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming
Abstract Sudden stratospheric warmings (SSWs) are large‐scale phenomena characterized by dramatic dynamic disruptions in the stratospheric winter polar regions. Previous studies, especially those employing whole atmosphere models, indicate that SSWs have strong impacts on the circulation of the meso...
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| Format: | Article |
| Language: | English |
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Wiley
2023-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL102579 |
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| author | Federico Gasperini McArthur Jones Jr Brian J. Harding Thomas J. Immel |
| author_facet | Federico Gasperini McArthur Jones Jr Brian J. Harding Thomas J. Immel |
| author_sort | Federico Gasperini |
| collection | DOAJ |
| description | Abstract Sudden stratospheric warmings (SSWs) are large‐scale phenomena characterized by dramatic dynamic disruptions in the stratospheric winter polar regions. Previous studies, especially those employing whole atmosphere models, indicate that SSWs have strong impacts on the circulation of the mesosphere lower thermosphere (MLT) and drive a reversal in the mean meridional circulation (MMC) near 90–125 km altitude. However, the robustness of these effects and the roles of SSW‐induced changes in global‐scale wave activity to drive the reversal have been difficult to observe simultaneously. This work employs horizontal lower thermospheric (∼93–106 km altitude) winds near 10°S‐40°N latitude from the Michelson Interferometer for Global High‐resolution Thermospheric Imaging instrument onboard the Ionospheric Connection Explorer (ICON) to present observational evidence of a prominent MLT MMC reversal associated with the January 2021 major SSW event and to demonstrate connections to semidiurnal tidal activity and possible associations with a ∼3‐day ultra‐fast Kevin wave. |
| format | Article |
| id | doaj-art-dc3e2a079df4467d9322f8a271fca20d |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2023-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-dc3e2a079df4467d9322f8a271fca20d2025-08-20T02:04:21ZengWileyGeophysical Research Letters0094-82761944-80072023-04-01507n/an/a10.1029/2022GL102579Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric WarmingFederico Gasperini0McArthur Jones Jr1Brian J. Harding2Thomas J. Immel3Orion Space Solutions Louisville CO USASpace Science Division U.S. Naval Research Laboratory Washington DC USASpace Sciences Laboratory University of California Berkeley CA USASpace Sciences Laboratory University of California Berkeley CA USAAbstract Sudden stratospheric warmings (SSWs) are large‐scale phenomena characterized by dramatic dynamic disruptions in the stratospheric winter polar regions. Previous studies, especially those employing whole atmosphere models, indicate that SSWs have strong impacts on the circulation of the mesosphere lower thermosphere (MLT) and drive a reversal in the mean meridional circulation (MMC) near 90–125 km altitude. However, the robustness of these effects and the roles of SSW‐induced changes in global‐scale wave activity to drive the reversal have been difficult to observe simultaneously. This work employs horizontal lower thermospheric (∼93–106 km altitude) winds near 10°S‐40°N latitude from the Michelson Interferometer for Global High‐resolution Thermospheric Imaging instrument onboard the Ionospheric Connection Explorer (ICON) to present observational evidence of a prominent MLT MMC reversal associated with the January 2021 major SSW event and to demonstrate connections to semidiurnal tidal activity and possible associations with a ∼3‐day ultra‐fast Kevin wave.https://doi.org/10.1029/2022GL102579sudden stratospheric warmingsthermosphereICONMIGHTImean circulationmesosphere‐lower‐thermosphere |
| spellingShingle | Federico Gasperini McArthur Jones Jr Brian J. Harding Thomas J. Immel Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming Geophysical Research Letters sudden stratospheric warmings thermosphere ICON MIGHTI mean circulation mesosphere‐lower‐thermosphere |
| title | Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming |
| title_full | Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming |
| title_fullStr | Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming |
| title_full_unstemmed | Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming |
| title_short | Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming |
| title_sort | direct observational evidence of altered mesosphere lower thermosphere mean circulation from a major sudden stratospheric warming |
| topic | sudden stratospheric warmings thermosphere ICON MIGHTI mean circulation mesosphere‐lower‐thermosphere |
| url | https://doi.org/10.1029/2022GL102579 |
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