Equatorial ionospheric electric fields during magnetospheric disturbances: local time/longitude dependences from recent EITS campaigns |
| |
| Affiliation: | 1. Charles University, Faculty of Mathematics and Physics, V Holesovickach 2, 180 00 Prague, Czech Republic;2. University of Texas at Arlington, Texas, TX 76019, USA;3. Institute of Atmospheric Physics, Czech Academy of Sciences, Bocni II 1401, 141 31 Praha 4, Czech Republic;4. National Central University, Institute of Space Science, 300 Jhongda Road, Jhongli, Taoyuan 32001, Taiwan;1. Instituto Tecnológico de Aeronáutica (ITA), Divisão de Ciências Fundamentais, São José dos Campos, SP, Brazil;2. Universidade do Vale do Paraíba (UNIVAP), Laboratório de Física e Astronomia, São José dos Campos, SP, Brazil;3. Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, SP, Brazil;4. Haystack Observatory, Massachusetts Institute of Technology (MIT), Westford, MA, USA;5. Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata (UNLP), La Plata, Argentina;6. Science and Technology Facilities Council, Rutherford Appleton Laboratory, United Kingdom;1. Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, China;2. Zhejiang Provincial Key Lab of Part Rolling Technology, Ningbo, China;3. Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, China;4. China Electric Power Research Institute, Beijing, China;1. Radio Cosmology Laboratory, Department of Physics, Faculty of Science, University of Malaya, Malaysia;2. Applied Electromagnetic Research Group (AERG), Faculty of Electrical Engineering, Universiti Teknologi MARA, Malaysia;3. Department of Physics, Kebbi State University of Science and Technology, Aliero, Nigeria;4. Department of Physics, University of Lagos, Nigeria;5. Department of Physics, University of Tasmania, Australia;6. International Center for Space Weather Science and Education (ICSWSE), Kyushu University, Japan;1. Institute of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211100, China;2. State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China |
| |
| Abstract: | Data sets collected during a few coordinated Equatorial Ionosphere-Thermosphere System (EITS) observational campaign periods, mainly from the Brazilian and Asian longitude sectors are analysed in this paper. Ionosonde magnetometer and Ionospheric Electron Content (IEC) data from the EITS-1 and -2 campaigns (during March and December 1991) are complemented by interplanetary magnetic field and some ground based data sets from other campaigns. The analysis focuses on the response of the equatorial ionospheric heights and ionization anomaly to disturbance electric fields, identified as a direct penetration electric field associated with IMF Bz changes and development of the ring current (especially the asymmetric component), and that produced by a disturbance zonal neutral wind. New evidence on the local time and longitudinal dependences of these electric fields constitute the main results of this paper. Especially, a large eastward electric field (associated with the asymmetric ring current) in the dusk-dawn sector causes significant expansion of the EIA in this sector, and amplification of the evening prereversal uplift of the F-layer over Brazil. Significant inhibition of the evening prereversal electric field enhancement seems to be produced by the disturbance zonal wind associated with the magnetic disturbances prevailing several hours earlier. Some tentative evidence on the Brazilian dusk sector disturbance field being larger than that of the Asian dusk sector support the existence of a longitude asymmetry in the intensity of the disturbance electric field. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
