| 项目编号: | 1524667
|
| 项目名称: | AGS-PRF: The Role of Electric Fields in Plasma Structuring and Transport in the Mid- to High-Latitude Ionosphere |
| 作者: | Evan Thomas
|
| 承担单位: | Thomas Evan G
|
| 批准年: | 2016
|
| 开始日期: | 2016-04-01
|
| 结束日期: | 2018-03-31
|
| 资助金额: | 172000
|
| 资助来源: | US-NSF
|
| 项目类别: | Fellowship
|
| 国家: | US
|
| 语种: | 英语
|
| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
|
| 英文关键词: | convection pattern
; solar wind
; ionospheric plasma
; earth
; mid-latitude
; high-latitude
; plasma
; project
; ionosphere equatorward
; mid-latitude region
; electric field
; solar plasma
; convection
; mid-latitude radar
; high latitudes
|
| 英文摘要: | The solar wind, a continuous stream of solar plasma and magnetic fields blowing past the Earth, generates an electric field and causes a large-scale circulation of plasma within the magnetosphere. Earth's magnetic field lines are "frozen" into the plasma and thus are entrained in this convection. Of particular interest, the feet of these convecting magnetic field lines thread the ionosphere (a layer of charged particles in the Earth's upper atmosphere) at high latitudes and set the ionospheric plasma into motion as well, forming patterns of convection that change as the solar wind changes. At lower latitudes the ionospheric plasma co-rotates with the Earth. Disturbances in the solar wind associated with stormy space weather strengthen the convection in the magnetosphere, which has the effect of expanding the convection pattern in the ionosphere equatorward into regions where previously the ionospheric plasma was co-rotating. This project aims at improving knowledge of the portion of the expanded convection pattern in the mid-latitude region, where observations have previously been sparse, using a set of newly built radars. This is crucial to understanding space storms and their effects at Earth. The improved convection patterns from this project will enable a broad spectrum of new research. This geoscience postdoctoral fellowship will support the further training of an early-career scientist. It will also ultimately result in more accurate space weather models of value to society.
To accomplish its goals, this project will use the Super Dual Auroral Radar Network (SuperDARN), which is a primary tool for constructing the high-latitude convection pattern and its variability. Recently SuperDARN expanded its coverage in the northern hemisphere by adding nine mid-latitude radars and three polar cap radars to better resolve these sections of the convection pattern. The work will use seven years of SuperDARN data from 2008 through 2014 in combination with solar wind observations from the OMNI 2 database to produce an expanded and improved model of the high-latitude convection pattern as it responds to solar wind drivers. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92540
|
| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Evan Thomas. AGS-PRF: The Role of Electric Fields in Plasma Structuring and Transport in the Mid- to High-Latitude Ionosphere. 2016-01-01.
|
|
|