| DOI: | 10.1002/grl.50197
|
| 论文题名: | Thermospheric damping response to sheath-enhanced geospace storms |
| 作者: | Knipp D.; Kilcommons L.; Hunt L.; Mlynczak M.; Pilipenko V.; Bowman B.; Deng Y.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9191
|
| EISSN: | 1944-8922
|
| 出版年: | 2013
|
| 卷: | 40, 期:7 | | 起始页码: | 1263
|
| 结束页码: | 1267
|
| 语种: | 英语
|
| 英文关键词: | auroral particles
; damping
; M-I-T coupling
; thermosphere
|
| Scopus关键词: | Auroral particles
; Forecasting algorithm
; Low-energy particles
; Nitric oxide emissions
; Solar wind density
; Solar wind dynamic pressure
; thermosphere
; Thermospheric density
; Algorithms
; Damping
; Deposition
; Nitric oxide
; Solar energy
; Solar wind
; Upper atmosphere
; Storms
; algorithm
; aurora
; damping
; hydrodynamics
; nitric oxide
; solar cycle
; solar wind
; storm
; thermosphere
; upper atmosphere
|
| 英文摘要: | We show evidence that solar wind density enhancements and pressure pulses can lead to intense low-energy particle precipitation and an associated, but unexpected, damping of thermospheric density response. Ground-based indices, used as proxies for thermospheric energy deposition, fail to capture these interactions in forecasting algorithms. Superposed epoch comparison of a group of poorly specified neutral density storms suggests an event-chain of (1) multi-hour, pre-storm solar wind density enhancement, followed by solar wind dynamic pressure pulses that trigger excess low-energy particle flux to the upper atmosphere; (2) enhanced production of thermospheric Nitric Oxide (NO) by precipitating particles and storm heating; (3) NO infrared cooling and damping of the thermosphere; and (4) mis-forecast of neutral density. In the control storms, these features are absent or muted. We discuss the roles of solar wind pre-conditioning and solar cycle dependency in the problem storms. These problem neutral-density storms reveal an element of "geo-effectiveness" that highlights competition between hydrodynamic aspects of the solar wind and other interplanetary drivers. Key Points Some sheath-driven storms induce rapid production of thermospheric nitric oxide Infrared nitric oxide emission competes with storm-driven energy deposition Resulting thermospheric ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876924779&doi=10.1002%2fgrl.50197&partnerID=40&md5=d1c40642bbf9130d4541ff2b3e224c81
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6455
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Aerospace Engineering Sciences, University of Colorado, Boulder, CO, United States
|
| Recommended Citation: | |
Knipp D.,Kilcommons L.,Hunt L.,et al. Thermospheric damping response to sheath-enhanced geospace storms[J]. Geophysical Research Letters,2013-01-01,40(7).
|
|
|