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Coordinated Ground-Based and Space-Borne Observations of Ionospheric Response to the Annular Solar Eclipse on 26 December 2019
Alternative TitleWOS:000595859400033
Aa, Ercha1; Zhang, Shun-Rong; Erickson, Philip J.; Goncharenko, Larisa P.; Coster, Anthea J.; Jonah, Olusegun F.; Lei, Jiuhou2,3,4; Huang, Fuqing2,3,4; Dang, Tong2,3,4; Liu, Lei5
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2020
Volume125Issue:11Pages:e2020JA028296
DOI10.1029/2020JA028296
ISSN2169-9380
Language英语
Keywordannular solar eclipse ionospheric response GNSS TEC DMSP Swarm in situ data EIA enhancement counter electrojet TOTAL ELECTRON-CONTENT LOW-LATITUDE IONOSPHERE GRAVITY-WAVES F-REGION PREREVERSAL ENHANCEMENT PLASMA DRIFT EQUATORIAL THERMOSPHERE LAYER TEMPERATURES
AbstractThis paper studies the ionosphere's response to the annular solar eclipse on 26 December 2019, utilizing the following ground-based and space-borne measurements: Global Navigation Satellite System (GNSS) total electron content (TEC) data, spectral radiance data from the Sentinel-5P satellite, in situ electron density and/or temperature measurements from DMSP and Swarm satellites, and local magnetometer data. Analysis concentrated on ionospheric effects over low-latitude regions with respect to obscuration, local time, latitude, and altitude. The main results are as follows: (1) a local TEC reduction of similar to 4-6 TECU (30-50%) was identified along the annular eclipse path, with larger depletion and longer recovery periods in the morning eclipse compared to midday. (2) The equatorial electrojet current was significantly weakened when the eclipse trajectory crossed the magnetic equator in the morning (India) sector, which contributed to large and prolonged TEC depletion therein. (3) At midday, equatorial ionization anomaly exhibited enhancements of 20-40% as well as poleward shifting of 3-4 degrees, likely triggered by modified neutral wind and electrodynamics patterns. (4) The behavior of equatorial ionospheric electron density showed considerable altitudinal differences in the topside, exhibiting similar to 30% reduction around 500 km and similar to 30% enhancement with 300-500 K Te reduction around 850 km, before the arrival of maximum eclipse. This may have been caused by the enhanced eastward electric field and equatorward neutral wind, and other possible factors are also discussed.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7527
Collection中国科学院国家空间科学中心
Affiliation1.[Aa, Ercha; Zhang, Shun-Rong; Erickson, Philip J.; Goncharenko, Larisa P.; Coster, Anthea J.; Jonah, Olusegun F.] MIT, Haystack Observ, Westford, MA 01886 USA
2.Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China
3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei, Peoples R China
4.Univ Sci & Technol China, Mengcheng Natl Geophys Observ, Hefei, Peoples R China
5.Univ Sci & Technol China, Ctr Excellence Comparat Planetol, Chinese Acad Sci, Hefei, Peoples R China
6.Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Peoples R China
Recommended Citation
GB/T 7714
Aa, Ercha,Zhang, Shun-Rong,Erickson, Philip J.,et al. Coordinated Ground-Based and Space-Borne Observations of Ionospheric Response to the Annular Solar Eclipse on 26 December 2019[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2020,125(11):e2020JA028296.
APA Aa, Ercha.,Zhang, Shun-Rong.,Erickson, Philip J..,Goncharenko, Larisa P..,Coster, Anthea J..,...&Liu, Lei.(2020).Coordinated Ground-Based and Space-Borne Observations of Ionospheric Response to the Annular Solar Eclipse on 26 December 2019.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,125(11),e2020JA028296.
MLA Aa, Ercha,et al."Coordinated Ground-Based and Space-Borne Observations of Ionospheric Response to the Annular Solar Eclipse on 26 December 2019".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 125.11(2020):e2020JA028296.
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