A Dynamic Fluid-Kinetic (DyFK) Model for Ionosphere-Magnetosphere Plasma Transport: Effects of Ionization and Thermal Electron Heating by Soft Electron Precipitation

流體、粒子動力模型對電離層、磁層電漿交換之研究：低能電子下墜加熱離子與熱電子效應

Garry M. Estep ； James L. Horwitz ； Yi-Jiun Su ； Phil G. Richards ； Gordon R. Wilson ； David G. Brown

《Terrestrial, Atmospheric and Oceanic Sciences》 10卷3期 (1999/09) Pp. 491-510

並列摘要

In order to efficiently and self-consistently describe the transport of high-latitude ionospheric plasma into the magnetosphere, we have developed a Dynamic coupled Fluid-Kinetic (DyFK) model for describing plasma flow along a magnetic flux tube. The collision-dominated ionospheric plasma is treated with a low-speed fluid approach for altitudes between 120-1100 km, while a generalized semikinetic approach is used for the topside and higher altitudes, starting at 800 km. This paper presents a description of the new DyFK model, along with illustrative results obtained from modeling the effects of soft (100 eV) auroral electron precipitation using the new model. The results demonstrate the accuracy and efficiency of the new DyFK model and illustrate how soft electron precipitation provides a mechanism to drive observed upflows of high-latitude ionospheric plasma along geomagnetic field lines.

並列關鍵字

Soft electron precipitation ； Coupled model ； Plasma outflow