Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm
This study explores the meteorological source and vertical propagation of gravity waves (GWs) that drive daytime traveling ionospheric disturbances (TIDs), using the specified dynamics version of the SD-WACCM-X (Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension) and the...
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EDP Sciences
2024-01-01
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| Series: | Journal of Space Weather and Space Climate |
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| Online Access: | https://www.swsc-journal.org/articles/swsc/full_html/2024/01/swsc230074/swsc230074.html |
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| author | Kogure Masaru Chou Min-Yang Yue Jia Otsuka Yuichi Liu Huixin Sassi Fabrizio Pedatella Nicholas Randall Cora E. Harvey V. Lynn |
| author_facet | Kogure Masaru Chou Min-Yang Yue Jia Otsuka Yuichi Liu Huixin Sassi Fabrizio Pedatella Nicholas Randall Cora E. Harvey V. Lynn |
| author_sort | Kogure Masaru |
| collection | DOAJ |
| description | This study explores the meteorological source and vertical propagation of gravity waves (GWs) that drive daytime traveling ionospheric disturbances (TIDs), using the specified dynamics version of the SD-WACCM-X (Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension) and the SAMI3 (Sami3 is Also a Model of the Ionosphere) simulations driven by SD-WACCM-X neutral wind and composition. A cold weather front moved over the northern-central USA (90–100°W, 35–45°N) during the daytime of 20 October 2020, with strong upward airflow. GWs with ~500–700 km horizontal wavelengths propagated southward and northward in the thermosphere over the north-central USA. Also, the perturbations were coherent from the surface to the thermosphere; therefore, the GWs were likely generated by vertical acceleration associated with the cold front over Minnesota and South Dakota. The convectively generated GWs had almost infinite vertical wavelength below ~100 km due to being evanescent. This implies that the GWs tunneled through their evanescent region in the middle atmosphere (where a squared vertical wavenumber is equal to or smaller than 0) and became freely propagating in the thermosphere and ionosphere. Medium-scale TIDs (MSTIDs) also propagated southward with the GWs, suggesting that the convectively generated GWs created MSTIDs. |
| format | Article |
| id | doaj-art-2736742af09947628b2ada634c3a5232 |
| institution | Kabale University |
| issn | 2115-7251 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of Space Weather and Space Climate |
| spelling | doaj-art-2736742af09947628b2ada634c3a52322025-01-08T11:24:12ZengEDP SciencesJournal of Space Weather and Space Climate2115-72512024-01-01143810.1051/swsc/2024036swsc230074Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter stormKogure Masaru0https://orcid.org/0000-0003-0774-8647Chou Min-Yang1Yue Jia2Otsuka Yuichi3Liu Huixin4Sassi Fabrizio5https://orcid.org/0000-0002-9492-7434Pedatella Nicholas6https://orcid.org/0000-0002-8878-5126Randall Cora E.7Harvey V. Lynn8Department of Earth and Planetary Science, Kyushu UniversityNASA Goddard Space Flight CenterNASA Goddard Space Flight CenterInstitute for Space-Earth Environmental Research, Nagoya UniversityDepartment of Earth and Planetary Science, Kyushu UniversityNASA Goddard Space Flight CenterHigh Altitude Observatory, NSF National Center for Atmospheric ResearchLaboratory for Atmospheric and Space Physics, University of ColoradoLaboratory for Atmospheric and Space Physics, University of ColoradoThis study explores the meteorological source and vertical propagation of gravity waves (GWs) that drive daytime traveling ionospheric disturbances (TIDs), using the specified dynamics version of the SD-WACCM-X (Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension) and the SAMI3 (Sami3 is Also a Model of the Ionosphere) simulations driven by SD-WACCM-X neutral wind and composition. A cold weather front moved over the northern-central USA (90–100°W, 35–45°N) during the daytime of 20 October 2020, with strong upward airflow. GWs with ~500–700 km horizontal wavelengths propagated southward and northward in the thermosphere over the north-central USA. Also, the perturbations were coherent from the surface to the thermosphere; therefore, the GWs were likely generated by vertical acceleration associated with the cold front over Minnesota and South Dakota. The convectively generated GWs had almost infinite vertical wavelength below ~100 km due to being evanescent. This implies that the GWs tunneled through their evanescent region in the middle atmosphere (where a squared vertical wavenumber is equal to or smaller than 0) and became freely propagating in the thermosphere and ionosphere. Medium-scale TIDs (MSTIDs) also propagated southward with the GWs, suggesting that the convectively generated GWs created MSTIDs.https://www.swsc-journal.org/articles/swsc/full_html/2024/01/swsc230074/swsc230074.htmlgravity wavemedium-scale traveling ionospheric disturbancetraveling ionospheric disturbance modeling |
| spellingShingle | Kogure Masaru Chou Min-Yang Yue Jia Otsuka Yuichi Liu Huixin Sassi Fabrizio Pedatella Nicholas Randall Cora E. Harvey V. Lynn Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm Journal of Space Weather and Space Climate gravity wave medium-scale traveling ionospheric disturbance traveling ionospheric disturbance modeling |
| title | Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm |
| title_full | Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm |
| title_fullStr | Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm |
| title_full_unstemmed | Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm |
| title_short | Medium-scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm |
| title_sort | medium scale traveling ionospheric disturbances created by primary gravity waves generated by a winter storm |
| topic | gravity wave medium-scale traveling ionospheric disturbance traveling ionospheric disturbance modeling |
| url | https://www.swsc-journal.org/articles/swsc/full_html/2024/01/swsc230074/swsc230074.html |
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