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題名 | 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 |
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作者 | Estep,Garry M.; Horwitz,James L.; Su,Yi-jiun; Richards,Phil G.; Wilson,Gordon R.; Brown,David G.; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷期 | 10:3 1999.09[民88.09] |
頁次 | 頁491-510 |
分類號 | 337.9 |
關鍵詞 | 流體-粒子動力模型; 電離層; 磁層電漿交換; 熱電子; Soft electron precipitation; Coupled model; Plasma outflow; |
語文 | 英文(English) |
英文摘要 | In order to efficiently and self-consistently describe the transport ofhigh-latitude ionospheric plasma into the magnetosphere, we have developed a Dynamic coupled Fluid-Kinetic (DyFK) model for describing plasmaflow along a magnetic flux tube. The collision-dominated ionospheric plasmais treated with a low-speed fluid approach for altitudes between 120-1100km, while a generalized semikinetic approach is used for the topside andhigher altitudes, starting at 800 km. This paper presents a description ofthe new DyFK model, along with illustrative results obtained from modeling the effects of soft (100 eV) auroral electron precipitation using the newmodel. The results demonstrate the accuracy and efficiency of the newDyFK model and illustrate how soft electron precipitation provides a mechanism to drive observed upflows of high-latitude ionospheric plasma alonggeomagnetic field lines. |
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