Applicability of the two-layer model for simulation of non-linear evolution of a large scale plasma cloud in the ionospheric F-region |
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| Affiliation: | 1. Institute of Space Sciences, Shandong University, Weihai 264209, China;2. Indian Institute of Geomagnetism, Navi Mumbai, 410218, India;3. Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan;1. National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, 15236 Penteli, Greece;2. Space Environment and Radio Engineering Group (SERENE), University of Birmingham, B15 2TT Birmingham, UK;3. Department of Physics, University of New Brunswick, PO Box 4440, Fredericton NB E3B 5A3, Canada;4. German Aerospace Center, 17235 Neustrelitz, Germany;5. University of Colorado, Boulder, CO 80302, USA;6. Institute of Meteorology and Water Management - National Research Institute, 01-673 Warsaw, Poland;7. Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, Poland;8. Department of Physics, University of Oslo, PO Box 1048 Blindern, 0316 Oslo, Norway;9. Instituto de Astrofísica e Ciências do Espaço, Physics Department, University of Coimbra, 3040-004 Coimbra, Portugal;10. Instituto de Astrofísica e Ciências do Espaço, Department of Earth Sciences, University of Coimbra, 3040-004 Coimbra, Portugal;11. Center for Advanced Public Safety, University of Alabama, Tuscaloosa, AL 35487, USA;12. Yonsei University, Department of Atmospheric Sciences, Seoul 03722, South Korea;1. National Institute for Space Research (INPE), Brazil;2. Aeronautics Institute of Technology (ITA), Brazil;3. German Aerospace Center (DLR), Germany |
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| Abstract: | The adequacy of the two-layer model of Lloyd and Haerendel for describing the behaviour of an ionospheric irregularity is verified by numerical simulation of large plasma cloud dynamics. The background ionosphere is approximated by a set of conductive layers with ion mobilities and concentrations corresponding to the real ionospheric conditions. Polarization electric field produces positive and negative image clouds, i.e. plasma density enhancements and depletions in each layer. Their intensity, form and orientation turn out to change with height depending on the local conditions. However, the drift and deformation of the released cloud slightly differ from the case when the ionosphere is characterized by constant, height averaged parameters, at least if altitude dependent neutral wind and photochemical processes are ignored. |
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