| 项目编号: | 1452191
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| 项目名称: | CEDAR: Characterizing the Polar Cap Topside Ionosphere |
| 作者: | Roger Varney
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| 承担单位: | SRI International
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| 批准年: | 2014
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| 开始日期: | 2015-07-15
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| 结束日期: | 2018-06-30
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| 资助金额: | USD358992
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| 资助来源: | US-NSF
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| 项目类别: | Continuing 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: | polar cap topside ionosphere
; polar cap
; ionosphere/polar wind model
; polar outflow probe
; polar wind
; topside scale height
; region
; polar cap topside observation
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| 英文摘要: | This project addresses the polar cap topside ionosphere, a heretofore poorly characterized region of geospace, using novel experiments with the Resolute Bay Incoherent Scatter Radars (RISR-N and RISR-C) together with observations from the Enhanced Polar Outflow Probe (ePOP), observations from the three Swarm spacecraft, and numerical experiments using the Ionosphere/Polar Wind Model (IPWM). Although this project focuses on one region of geospace, it also relates to the connections between this region and other parts of the high-latitude geospace system. The polar cap topside ionosphere is a transition region with the magnetosphere through which ion upflows and outflows are transported. The polar cap is also a transition region between the dayside and the nightside, across which a significant amount of plasma is transported.
A new pulse sequence will be developed for the incoherent scatter radars to enhance the sensitivity to the topside. The following specific questions will be addressed: (1) What are the typical properties of the polar cap topside ionosphere? (2) Which physical processes control the day-to-day, intraday, and patch-to-patch variability of the topside scale height and related quantities such as plasma temperature and ion upflow/downflow flux? (3) What do the polar cap topside observations imply about conditions upstream, e.g. in the cusp/cleft, and above in the polar wind? |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93939
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Roger Varney. CEDAR: Characterizing the Polar Cap Topside Ionosphere. 2014-01-01.
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