DOI: 10.1002/2016GL070592
论文题名: Impact of the lower atmosphere on the ionosphere response to a geomagnetic superstorm
作者: Pedatella N.M.
刊名: Geophysical Research Letters
ISSN: 0094-8624
EISSN: 1944-8355
出版年: 2016
卷: 43, 期: 18 起始页码: 9383
结束页码: 9389
语种: 英语
英文关键词: geomagnetic storm
; ionosphere
; October 2003 Halloween storm
; sudden stratosphere warming
Scopus关键词: Geomagnetism
; Ionospheric measurement
; Storms
; Equatorial ionosphere
; General circulation model
; Geomagnetic storm
; Halloween storms
; National center for atmospheric researches
; Sudden stratosphere warming
; Thermosphere-ionosphere
; Total electron content
; Ionosphere
英文摘要: Numerical simulations in the National Center for Atmospheric Research (NCAR) thermosphere-ionosphere-electrodynamics general circulation model (TIE-GCM) are performed to elucidate the impacts of lower atmosphere forcing on the ionosphere response to a geomagnetic superstorm. In particular, how the ionosphere variability due to the October 2003 Halloween storm would be different if it occurred in January coincident with a major sudden stratosphere warming (SSW) event is investigated. The TIE-GCM simulations reveal that the E× B vertical drift velocity and total electron content (TEC) respond differently to the geomagnetic forcing when the lower atmosphere forcing is representative of SSW conditions compared to climatological lower atmosphere forcing conditions. Notably, the storm time variations in the E× B vertical drift velocity differ when the SSW-induced zonal mean and tidal variability in the lower thermosphere are considered, and this is in part due to effects of the SSW on the equatorial ionosphere being potentially misinterpreted as being of geomagnetic origin. Differences in the TEC response to the geomagnetic storm can be up to 100% (∼30 TEC unit (TECU: 1 TECU = 1016 el m−2)) of the storm-induced TEC change, and the temporal variability of the TEC during the storm recovery phase is considerably different if SSW effects are considered. The results demonstrate that even during periods of extreme geomagnetic forcing, it is important to consider the effects of lower atmosphere forcing on the ionosphere variability. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988037284&doi=10.1002%2f2016GL070592&partnerID=40&md5=5794e2411526316971a39488e96276a7
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9587
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Pedatella N.M.. Impact of the lower atmosphere on the ionosphere response to a geomagnetic superstorm[J]. Geophysical Research Letters,2016-01-01,43(18).