Interaction of two long-wavelength modes in the nonlinear numerical simulation model of equatorial spreadF
作者： R. Sekar , E. A. Kherani , P. B. Rao , A. K. Patra
DOI: 10.1029/2000JA000361
关键词: Plasma 、 Nonlinear system 、 Perturbation (astronomy) 、 Physics 、 Streak 、 Computational physics 、 Amplitude 、 Wavelength 、 Superposition principle 、 Plume 、 Optics 、 Earth-Surface Processes 、 Ecology (disciplines) 、 Earth and Planetary Sciences (miscellaneous) 、 Space and Planetary Science 、 Palaeontology 、 Forestry 、 Aquatic science 、 Atmospheric Science 、 Soil science 、 Geochemistry and Petrology 、 Geophysics 、 Oceanography 、 Water Science and Technology
摘要: In order to understand the evolution of equatorial spread F structures and their dynamics an investigation was carried out with perturbation consisting a single wavelength mode superposition two modes. The revealed that depleted region always moves upward mode, while modes gives rise low-level plasma depletion which downward even when ambient motion is upward, in addition well-developed moving bubbles downdrafting enhancements varying degrees development. Further, scale size corresponding shorter-wavelength possible very small (0.5%) amplitude it rides over long-wavelength large (5%) perturbation. longer-wavelength develops form lower envelope multiple plumes degree depletions ride, separation between decided by short-wavelength subject former being larger comparison latter. rising descending structure along streak as observed Indian Mesosphere-Stratosphere-Troposphere (VHF) radar can qualitatively be understood on basis interaction growth rates rapidly enhancement followed weakly depending upon wave parameters
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