Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours
Abstract In this study, an unusual daytime range spread F event recorded by the ionosonde installed at Zhangye (ZHY, 39.4°N, 100.13°E, dip latitude 29.65°N) station during the afternoon of December 23, 2016 was presented. Daytime spread F during the afternoon hours have seldom been reported at midla...
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| Language: | English |
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Wiley
2021-11-01
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| Series: | Space Weather |
| Online Access: | https://doi.org/10.1029/2021SW002870 |
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| author | Lehui Wei Chunhua Jiang Ting Lan Wenxuan Wang Hua Shen Ercha Aa Wengeng Huang Jing Liu Guobin Yang Yaogai Hu Zhengyu Zhao |
| author_facet | Lehui Wei Chunhua Jiang Ting Lan Wenxuan Wang Hua Shen Ercha Aa Wengeng Huang Jing Liu Guobin Yang Yaogai Hu Zhengyu Zhao |
| author_sort | Lehui Wei |
| collection | DOAJ |
| description | Abstract In this study, an unusual daytime range spread F event recorded by the ionosonde installed at Zhangye (ZHY, 39.4°N, 100.13°E, dip latitude 29.65°N) station during the afternoon of December 23, 2016 was presented. Daytime spread F during the afternoon hours have seldom been reported at midlatitude regions. In addition, observations of daytime spread F are mostly the frequency spread F. In this case, daytime range spread F and spread Es in the midlatitude region were simultaneously observed during the afternoon hours (15:15‐16:00 LT). Moreover, some distorted traces of the main traces occurred on ionograms during the morning. The result of these observations seems to indicate that these extra traces and daytime diffused echoes on ionograms might be attributed to the same ionospheric disturbances phenomenon. Analysis of the iso‐frequency of ionospheric virtual height from ZHY ionosonde data during this event revealed the presence of wave‐like disturbances consistent with traveling ionosphere disturbances (TIDs)/atmospheric gravity waves (AGWs). The periods of TIDs on this day are in a range of 20–70 min that can be roughly classified into MSTIDs. We found that the daytime range spread F might be induced by the passage of ionospheric wave‐like structures caused by TIDs/AGWs. In addition, the seeding of TIDs/AGWs might be attributed to the stratosphere gravity waves over the Qinghai‐Tibetan Plateau, which causes the coupled of the atmosphere‐ionosphere‐thermosphere to significantly impact the ionosphere. |
| format | Article |
| id | doaj-art-3108b77b07d24a60b1fc187173d94473 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2021-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-3108b77b07d24a60b1fc187173d944732025-01-14T16:27:04ZengWileySpace Weather1542-73902021-11-011911n/an/a10.1029/2021SW002870Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon HoursLehui Wei0Chunhua Jiang1Ting Lan2Wenxuan Wang3Hua Shen4Ercha Aa5Wengeng Huang6Jing Liu7Guobin Yang8Yaogai Hu9Zhengyu Zhao10School of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaSchool of Computer Huanggang Normal University Huanggang ChinaSchool of Electronic Information Wuhan University Wuhan ChinaNational Space Science Center Chinese Academy of Sciences Beijing ChinaHaystack Observatory Massachusetts Institute of Technology Westford MA USANational Space Science Center Chinese Academy of Sciences Beijing ChinaInstitute of Earthquake Forecasting China Earthquake Administration Beijing ChinaSchool of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaSchool of Electronic Information Wuhan University Wuhan ChinaAbstract In this study, an unusual daytime range spread F event recorded by the ionosonde installed at Zhangye (ZHY, 39.4°N, 100.13°E, dip latitude 29.65°N) station during the afternoon of December 23, 2016 was presented. Daytime spread F during the afternoon hours have seldom been reported at midlatitude regions. In addition, observations of daytime spread F are mostly the frequency spread F. In this case, daytime range spread F and spread Es in the midlatitude region were simultaneously observed during the afternoon hours (15:15‐16:00 LT). Moreover, some distorted traces of the main traces occurred on ionograms during the morning. The result of these observations seems to indicate that these extra traces and daytime diffused echoes on ionograms might be attributed to the same ionospheric disturbances phenomenon. Analysis of the iso‐frequency of ionospheric virtual height from ZHY ionosonde data during this event revealed the presence of wave‐like disturbances consistent with traveling ionosphere disturbances (TIDs)/atmospheric gravity waves (AGWs). The periods of TIDs on this day are in a range of 20–70 min that can be roughly classified into MSTIDs. We found that the daytime range spread F might be induced by the passage of ionospheric wave‐like structures caused by TIDs/AGWs. In addition, the seeding of TIDs/AGWs might be attributed to the stratosphere gravity waves over the Qinghai‐Tibetan Plateau, which causes the coupled of the atmosphere‐ionosphere‐thermosphere to significantly impact the ionosphere.https://doi.org/10.1029/2021SW002870 |
| spellingShingle | Lehui Wei Chunhua Jiang Ting Lan Wenxuan Wang Hua Shen Ercha Aa Wengeng Huang Jing Liu Guobin Yang Yaogai Hu Zhengyu Zhao Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours Space Weather |
| title | Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours |
| title_full | Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours |
| title_fullStr | Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours |
| title_full_unstemmed | Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours |
| title_short | Observations of Unusual Daytime Range Spread F at Middle Latitude During the Afternoon Hours |
| title_sort | observations of unusual daytime range spread f at middle latitude during the afternoon hours |
| url | https://doi.org/10.1029/2021SW002870 |
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