First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over Arecibo
Abstract We present an investigation of a prominent 4.8‐hr tidal wave observed at altitudes between 260 and 500 km, using data collected by the Arecibo incoherent scatter radar during March 17–20, 2015. Within this altitude range, the 4.8‐hr tide exhibits amplitudes of approximately 25 m/s, surpassi...
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| Format: | Article |
| Language: | English |
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Wiley
2025-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL115315 |
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| author | Yun Gong Shaodong Zhang Qihou Zhou Xinkun Chen Zheng Ma Yanlin Li |
| author_facet | Yun Gong Shaodong Zhang Qihou Zhou Xinkun Chen Zheng Ma Yanlin Li |
| author_sort | Yun Gong |
| collection | DOAJ |
| description | Abstract We present an investigation of a prominent 4.8‐hr tidal wave observed at altitudes between 260 and 500 km, using data collected by the Arecibo incoherent scatter radar during March 17–20, 2015. Within this altitude range, the 4.8‐hr tide exhibits amplitudes of approximately 25 m/s, surpassing the semidiurnal tide and being twice as large as the diurnal tide. To our knowledge, this is the first report of such a strong 4.8‐hr tide. Notably, two consecutive midnight ionospheric collapses occurred on the night of March 17–18. Our analysis reveals that both the 4.8‐hr tide in the meridional wind and the zonal electric field are crucial to the generation the first collapse, while the former playing a more important role in the formation of the second collapse. The generation of the 4.8‐hr tide and the variability of the zonal electric field are likely associated with the effects of a major geomagnetic storm. |
| format | Article |
| id | doaj-art-85d56415a3e344e08a367753a98f9fa6 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-85d56415a3e344e08a367753a98f9fa62025-08-20T03:40:44ZengWileyGeophysical Research Letters0094-82761944-80072025-08-015215n/an/a10.1029/2025GL115315First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over AreciboYun Gong0Shaodong Zhang1Qihou Zhou2Xinkun Chen3Zheng Ma4Yanlin Li5School of Earth and Space Science and Technology Wuhan University Wuhan ChinaSchool of Earth and Space Science and Technology Wuhan University Wuhan ChinaElectrical and Computer Engineering Department Miami University Oxford OH USASchool of Earth and Space Science and Technology Wuhan University Wuhan ChinaSchool of Earth and Space Science and Technology Wuhan University Wuhan ChinaElectrical and Computer Engineering Department Miami University Oxford OH USAAbstract We present an investigation of a prominent 4.8‐hr tidal wave observed at altitudes between 260 and 500 km, using data collected by the Arecibo incoherent scatter radar during March 17–20, 2015. Within this altitude range, the 4.8‐hr tide exhibits amplitudes of approximately 25 m/s, surpassing the semidiurnal tide and being twice as large as the diurnal tide. To our knowledge, this is the first report of such a strong 4.8‐hr tide. Notably, two consecutive midnight ionospheric collapses occurred on the night of March 17–18. Our analysis reveals that both the 4.8‐hr tide in the meridional wind and the zonal electric field are crucial to the generation the first collapse, while the former playing a more important role in the formation of the second collapse. The generation of the 4.8‐hr tide and the variability of the zonal electric field are likely associated with the effects of a major geomagnetic storm.https://doi.org/10.1029/2025GL115315tidal wavesthermosphereincoherent scatter radar |
| spellingShingle | Yun Gong Shaodong Zhang Qihou Zhou Xinkun Chen Zheng Ma Yanlin Li First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over Arecibo Geophysical Research Letters tidal waves thermosphere incoherent scatter radar |
| title | First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over Arecibo |
| title_full | First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over Arecibo |
| title_fullStr | First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over Arecibo |
| title_full_unstemmed | First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over Arecibo |
| title_short | First Observation of a Strong Thermospheric 4.8‐Hour Tide and Its Impact on the Ionosphere Over Arecibo |
| title_sort | first observation of a strong thermospheric 4 8 hour tide and its impact on the ionosphere over arecibo |
| topic | tidal waves thermosphere incoherent scatter radar |
| url | https://doi.org/10.1029/2025GL115315 |
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