Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato
Abstract The ionosphere exhibits complex variations due to the influences from above and below. To distinguish the source of ionospheric disturbances is important for understanding the variation process and the coupling mechanism among different regions. Using the ionospheric total electron content...
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Wiley
2024-05-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2023SW003694 |
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| author | Ke Li Donghe Zhang Yi Zeng Yaoyu Tian Guofeng Dai Zhizhao Liu Guanglin Yang Shuji Sun Guozhu Li Yongqiang Hao Zuo Xiao |
| author_facet | Ke Li Donghe Zhang Yi Zeng Yaoyu Tian Guofeng Dai Zhizhao Liu Guanglin Yang Shuji Sun Guozhu Li Yongqiang Hao Zuo Xiao |
| author_sort | Ke Li |
| collection | DOAJ |
| description | Abstract The ionosphere exhibits complex variations due to the influences from above and below. To distinguish the source of ionospheric disturbances is important for understanding the variation process and the coupling mechanism among different regions. Using the ionospheric total electron content (TEC) derived from Global Navigation Satellite System observations, the ionospheric disturbances during the super typhoon Hato in 2017 that was accompanied by a weak geomagnetic storm are revisited, including the ionospheric deviation and traveling ionospheric disturbances (TIDs). It is found that the ionospheric TEC in the low‐latitude region of China experienced a significant enhancement (200% compared to the quiet geomagnetic day) on Hato landing day. This enhancement covers the northern and southern equatorial ionization anomaly (EIA) region from 80°E to 180°E. Considering the geomagnetic condition, the hmF2 and the O/N2 ratio in thermosphere, it is concluded that this enhancement is not related to the typhoon, but to the coinciding weak geomagnetic storm. Additionally, several medium‐scale TIDs are verified from differential TEC data in China low latitude region during Hato period. Most of them occur after sunset and their propagating direction is southwest that often occur in East‐Asian sector in summer months, which are not related to the typhoon. While a few TIDs with concentric wavefront (Concentric TIDs) are also observed on the day before Hato landfall that should be excited in the deep convective region of the typhoon. Because the ionosphere is affected by disturbances both from above and below, it should be careful to determine the source of the ionospheric disturbances. |
| format | Article |
| id | doaj-art-75f3b929cb95409881b92c89577dd9cc |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-75f3b929cb95409881b92c89577dd9cc2025-01-14T16:27:30ZengWileySpace Weather1542-73902024-05-01225n/an/a10.1029/2023SW003694Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon HatoKe Li0Donghe Zhang1Yi Zeng2Yaoyu Tian3Guofeng Dai4Zhizhao Liu5Guanglin Yang6Shuji Sun7Guozhu Li8Yongqiang Hao9Zuo Xiao10School of Earth and Space Sciences Peking University Beijing ChinaSchool of Earth and Space Sciences Peking University Beijing ChinaSchool of Earth and Space Sciences Peking University Beijing ChinaSchool of Earth and Space Sciences Peking University Beijing ChinaBeijing National Observatory of Space Environment Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaDepartment of Land Surveying and Geo‐Informatics The Hong Kong Polytechnic University Hong Kong ChinaKey Laboratory of Space Weather National Satellite Meteorological Center (National Center for Space Weather) China Meteorological Administration Beijing ChinaChina Research Institute of Radio‐Wave Propagation Qingdao ChinaBeijing National Observatory of Space Environment Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaSchool of Atmospheric Sciences Sun Yat‐sen University Zhuhai ChinaSchool of Earth and Space Sciences Peking University Beijing ChinaAbstract The ionosphere exhibits complex variations due to the influences from above and below. To distinguish the source of ionospheric disturbances is important for understanding the variation process and the coupling mechanism among different regions. Using the ionospheric total electron content (TEC) derived from Global Navigation Satellite System observations, the ionospheric disturbances during the super typhoon Hato in 2017 that was accompanied by a weak geomagnetic storm are revisited, including the ionospheric deviation and traveling ionospheric disturbances (TIDs). It is found that the ionospheric TEC in the low‐latitude region of China experienced a significant enhancement (200% compared to the quiet geomagnetic day) on Hato landing day. This enhancement covers the northern and southern equatorial ionization anomaly (EIA) region from 80°E to 180°E. Considering the geomagnetic condition, the hmF2 and the O/N2 ratio in thermosphere, it is concluded that this enhancement is not related to the typhoon, but to the coinciding weak geomagnetic storm. Additionally, several medium‐scale TIDs are verified from differential TEC data in China low latitude region during Hato period. Most of them occur after sunset and their propagating direction is southwest that often occur in East‐Asian sector in summer months, which are not related to the typhoon. While a few TIDs with concentric wavefront (Concentric TIDs) are also observed on the day before Hato landfall that should be excited in the deep convective region of the typhoon. Because the ionosphere is affected by disturbances both from above and below, it should be careful to determine the source of the ionospheric disturbances.https://doi.org/10.1029/2023SW003694ionospheric variationtraveling ionospheric disturbancetyphoontropical cyclonegeomagnetic storm |
| spellingShingle | Ke Li Donghe Zhang Yi Zeng Yaoyu Tian Guofeng Dai Zhizhao Liu Guanglin Yang Shuji Sun Guozhu Li Yongqiang Hao Zuo Xiao Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato Space Weather ionospheric variation traveling ionospheric disturbance typhoon tropical cyclone geomagnetic storm |
| title | Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato |
| title_full | Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato |
| title_fullStr | Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato |
| title_full_unstemmed | Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato |
| title_short | Revisiting the Ionospheric Disturbances Over Low Latitude Region of China During Super Typhoon Hato |
| title_sort | revisiting the ionospheric disturbances over low latitude region of china during super typhoon hato |
| topic | ionospheric variation traveling ionospheric disturbance typhoon tropical cyclone geomagnetic storm |
| url | https://doi.org/10.1029/2023SW003694 |
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