NSSC OpenIR  > 空间科学部
Thermosphere and ionosphere response to subauroral polarization streams (SAPS): Model simulations
Wang, Wenbin; Talaat, Elsayed R.; Burns, Alan G.; Emery, Barbary; Hsieh, Syau-yun; Lei, Jiuhou; Xu, Jiyao; Wang, WB (reprint author), Natl Ctr Atmospher Res, High Altitude Observ, POB 3000, Boulder, CO 80307 USA.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2012
Volume117Pages:A07301
ISSN0148-0227
Language英语
AbstractAn empirical model of subauroral polarization streams (SAPS) has been incorporated into the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM). This SAPS driven TIEGCM is used to simulate the effect of SAPS on the global thermosphere and ionosphere during a moderate geomagnetically active period between day of year (DOY) 329 and 333 in 2008. Model results show: (1) SAPS caused an increase in global thermospheric temperature which became stronger with time. This neutral temperature increase was more significant in subauroral and auroral regions. Joule heating by the SAPS and the redistribution of this heat by dynamic processes were the primary mechanisms for the simulated global neutral temperature changes. (2) In the SAPS driven TIEGCM, the strong ion drag effect in the subauroral SAPS channel drove large changes in thermospheric winds. Zonal neutral winds had either an extra, separate channel of westward flow in the subauroral region in the afternoon-midnight sector or a broad westward wind jet that merged with the regular duskside auroral westward zonal neutral wind driven by the high latitude convection pattern. The exact latitudinal profile of the zonal winds depended on local time. (3) The response of neutral temperature and wind to SAPS was more significant at higher altitudes and exhibited seasonal/hemispheric asymmetry. (4) The heating to the thermosphere by SAPS also resulted in changes in thermospheric composition with upwelling of molecular rich air in subauroral and auroral regions and downwelling of atomic oxygen rich air at other latitudes. These changes in thermospheric composition contributed to the deeper and more extended ionospheric electron density depletions in subauroral middle latitude regions, as well as electron density increases along the equatorward edge of the SAPS channel in the afternoon sector.; An empirical model of subauroral polarization streams (SAPS) has been incorporated into the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM). This SAPS driven TIEGCM is used to simulate the effect of SAPS on the global thermosphere and ionosphere during a moderate geomagnetically active period between day of year (DOY) 329 and 333 in 2008. Model results show: (1) SAPS caused an increase in global thermospheric temperature which became stronger with time. This neutral temperature increase was more significant in subauroral and auroral regions. Joule heating by the SAPS and the redistribution of this heat by dynamic processes were the primary mechanisms for the simulated global neutral temperature changes. (2) In the SAPS driven TIEGCM, the strong ion drag effect in the subauroral SAPS channel drove large changes in thermospheric winds. Zonal neutral winds had either an extra, separate channel of westward flow in the subauroral region in the afternoon-midnight sector or a broad westward wind jet that merged with the regular duskside auroral westward zonal neutral wind driven by the high latitude convection pattern. The exact latitudinal profile of the zonal winds depended on local time. (3) The response of neutral temperature and wind to SAPS was more significant at higher altitudes and exhibited seasonal/hemispheric asymmetry. (4) The heating to the thermosphere by SAPS also resulted in changes in thermospheric composition with upwelling of molecular rich air in subauroral and auroral regions and downwelling of atomic oxygen rich air at other latitudes. These changes in thermospheric composition contributed to the deeper and more extended ionospheric electron density depletions in subauroral middle latitude regions, as well as electron density increases along the equatorward edge of the SAPS channel in the afternoon sector.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3133
Collection空间科学部
Corresponding AuthorWang, WB (reprint author), Natl Ctr Atmospher Res, High Altitude Observ, POB 3000, Boulder, CO 80307 USA.
Recommended Citation
GB/T 7714
Wang, Wenbin,Talaat, Elsayed R.,Burns, Alan G.,et al. Thermosphere and ionosphere response to subauroral polarization streams (SAPS): Model simulations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2012,117:A07301.
APA Wang, Wenbin.,Talaat, Elsayed R..,Burns, Alan G..,Emery, Barbary.,Hsieh, Syau-yun.,...&Wang, WB .(2012).Thermosphere and ionosphere response to subauroral polarization streams (SAPS): Model simulations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,117,A07301.
MLA Wang, Wenbin,et al."Thermosphere and ionosphere response to subauroral polarization streams (SAPS): Model simulations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 117(2012):A07301.
Files in This Item: Download All
File Name/Size DocType Version Access License
2012117A07301.pdf(5126KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Wenbin]'s Articles
[Talaat, Elsayed R.]'s Articles
[Burns, Alan G.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Wenbin]'s Articles
[Talaat, Elsayed R.]'s Articles
[Burns, Alan G.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Wenbin]'s Articles
[Talaat, Elsayed R.]'s Articles
[Burns, Alan G.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2012117A07301.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.