| 项目编号: | 1702134
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| 项目名称: | GEM: Simulation Studies of Plasma Redistribution in the Ionosphere and Plasma Supply to the Magnetosphere in Geomagnetic Active Periods |
| 作者: | Jiannan Tu
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| 承担单位: | University of Massachusetts Lowell
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| 批准年: | 2017
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| 开始日期: | 2017-09-01
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| 结束日期: | 2020-08-31
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| 资助金额: | 279038
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | plasma redistribution
; plasma
; outflow plasma
; global plasma transport
; possible counterpart plasmaspheric plume
; geomagnetic active time
; proposed study
; simulation study
; ionospheric plasma supply
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| 英文摘要: | This project is focused on investigating how changes in the structure of the upper levels of the atmosphere can lead to changes in the plasma flowing out into the outer space. During periods of significant space weather the circulation of plasma in the upper atmosphere can be dramatically changed, resulting in high density regions flowing over the polar cap that can lead to enhanced outflow of plasma flowing out along magnetic field lines into outer space. These changes can impact radio communications through the ionosphere and may cause significant errors in positions derived from satellite based navigation systems. The investigators will address this important topic through the development of a numerical model. This model will be able to address how the outflow plasma relates to these density enhancements. Success in modeling these interactions could potentially lead to improved numerical models for forecasting space weather. In addition, this investigation will support training of a graduate student in computer programming and data analysis techniques.
A major focus of this investigation will be simulation studies of plasma redistribution associated with the storm enhanced density (SED) and its possible counterpart plasmaspheric plume, polar cap tongues and patches, and enhanced ion outflow associated with such plasma redistribution during geomagnetic active times. The objective of the proposed studies is to expand the Dynamic Fluid Kinetic (DyFK) model to simultaneously follow multiple drifting individual flux tubes for simulating global plasma transport; to quantitatively understand physical processes that cause plasma redistribution and ion outflow; to provide quantitative measure of global ion outflow fluxes of multiple species necessary to understand effects of ionospheric plasma supply on the magnetospheric dynamics. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89107
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Jiannan Tu. GEM: Simulation Studies of Plasma Redistribution in the Ionosphere and Plasma Supply to the Magnetosphere in Geomagnetic Active Periods. 2017-01-01.
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