Three‐dimensional numerical simulation of equatorial <i>F</i> region plasma irregularities with bottomside shear flow
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- H. C. Aveiro
- Department of Earth and Atmospheric Sciences Cornell University Ithaca New York USA
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- D. L. Hysell
- Department of Earth and Atmospheric Sciences Cornell University Ithaca New York USA
書誌事項
- 公開日
- 2010-11
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2010ja015602
- 公開者
- American Geophysical Union (AGU)
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説明
<jats:p>A three‐dimensional numerical simulation of plasma density irregularities in the postsunset equatorial <jats:italic>F</jats:italic> region ionosphere leading to equatorial spread <jats:italic>F</jats:italic> (ESF) is described. The simulation advances the plasma number density and electrostatic potential forward in time by enforcing the constraints of quasi‐neutrality and momentum conservation. The magnetic field lines are not modeled as equipotentials. Simulations are performed for cases with no background winds, with no background electric field or gravity, and with winds, a background electric field, and gravity all working in concert. The first run produced generalized Rayleigh Taylor (GRT) instability, and the second produced collisional shear instability (CSI). The combined run produced an instability which developed into an intense ESF event more quickly and with more realistic characteristics than the other two. Simulation results are compared with incoherent and coherent scatter radar data from the magnetic equator. A number of signature ESF characteristics are shown to be reproduced by the simulation.</jats:p>
収録刊行物
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- Journal of Geophysical Research: Space Physics
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Journal of Geophysical Research: Space Physics 115 (A11), 2010-11
American Geophysical Union (AGU)
