| 项目编号: | 1342968
|
| 项目名称: | CEDAR: Dynamics of SAPS (SubAuroral Polarization Streams) during Geomagnetic Disturbances and Their Effects on the Coupled Ionosphere-Thermosphere System |
| 作者: | Shasha Zou
|
| 承担单位: | University of Michigan Ann Arbor
|
| 批准年: | 2013
|
| 开始日期: | 2014-05-01
|
| 结束日期: | 2018-04-30
|
| 资助金额: | USD346941
|
| 资助来源: | US-NSF
|
| 项目类别: | Continuing grant
|
| 国家: | US
|
| 语种: | 英语
|
| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
|
| 英文关键词: | sap
; effect
; dynamics
; saps intensification
; system
; global ionosphere thermosphere model
; geomagnetic disturbance
; outstanding magnetosphere-ionosphere coupling problem
; subauroral polarization streams
; saps evolution
; it system
|
| 英文摘要: | This project aims to comprehensively investigate the dynamics of SubAuroral Polarization Streams (SAPS) during geomagnetic disturbances and their effects on the ionosphere and thermosphere (IT). The dynamics of SAPS is an outstanding magnetosphere-ionosphere coupling problem associated with the electrodynamics at the interface between the hot and cold particle populations in the inner magnetosphere. The generation mechanisms of SAPS during geomagnetic active times, in particular substorms, are still not well understood, nor are the wave-like oscillations embedded within SAPS, or the effects of SAPS on the global IT system.
Ground-based observations (Super Dual Auroral Radar Network (SuperDARN), Poker Flat Incoherent Scatter Radar (PFISR) and all-sky imager arrays) and space-based measurements (Time History of Events and Macroscale Interactions during Substorms (THEMIS) and the Van Allen probes), as well as the Global Ionosphere Thermosphere Model (GITM), will be used to carry out an integrated study of the dynamics of SAPS and their effects on the coupled IT system. Specific objectives are (1) to statistically construct the distribution of response times of SAPS intensifications relative to substorm onset and the distribution of intensification durations, and investigate the underlying mechanisms responsible for the SAPS intensification and for variable time delays, (2) to characterize the wave activity within the SAPS and their magnetospheric counterparts and identify the nature of the wave activity, and (3) to quantitatively evaluate the role of ion precipitation in affecting the SAPS evolution and the effect of the SAPS intensification after substorm onset and the wavy-structures of SAPS on the IT system using GITM.
This project will support the professional development of two young researchers, including one female. It will also involve participation of a graduate student and summer REU students. Project results will be disseminated broadly. The project is interdisciplinary and will be valuable to the GEM (Geospace Environment Modeling) community, and contribute to an improved understanding of space-weather events. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96952
|
| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Shasha Zou. CEDAR: Dynamics of SAPS (SubAuroral Polarization Streams) during Geomagnetic Disturbances and Their Effects on the Coupled Ionosphere-Thermosphere System. 2013-01-01.
|
|
|