DOI: 10.1002/2016GL069834
论文题名: Effects of magnetospheric lobe cell convection on dayside upper thermospheric winds at high latitudes
作者: Zhang B. ; Wang W. ; Wu Q. ; Knipp D. ; Kilcommons L. ; Brambles O.J. ; Liu J. ; Wiltberger M. ; Lyon J.G. ; Häggström I.
刊名: Geophysical Research Letters
ISSN: 0094-8761
EISSN: 1944-8492
出版年: 2016
卷: 43, 期: 16 起始页码: 8348
结束页码: 8355
语种: 英语
英文关键词: ion-neutral coupling
; magnetosphere-ionosphere-thermosphere coupling
; magnetospheric lobe cell convection
; thermospheric winds
Scopus关键词: Cells
; Cytology
; Geomagnetism
; Ionosphere
; Ionospheric measurement
; Magnetosphere
; Defense Meteorological Satellite Programs
; Geomagnetic activities
; High Latitudes
; Ion-neutral coupling
; Ionospheric plasmas
; Physical mechanism
; Possible mechanisms
; Thermospheric winds
; Wind
英文摘要: This paper investigates a possible physical mechanism of the observed dayside high-latitude upper thermospheric wind using numerical simulations from the coupled magnetosphere-ionosphere-thermosphere (CMIT) model. Results show that the CMIT model is capable of reproducing the unexpected afternoon equatorward winds in the upper thermosphere observed by the High altitude Interferometer WIND observation (HIWIND) balloon. Models that lack adequate coupling produce poleward winds. The modeling study suggests that ion drag driven by magnetospheric lobe cell convection is another possible mechanism for turning the climatologically expected dayside poleward winds to the observed equatorward direction. The simulation results are validated by HIWIND, European Incoherent Scatter, and Defense Meteorological Satellite Program. The results suggest a strong momentum coupling between high-latitude ionospheric plasma circulation and thermospheric neutral winds in the summer hemisphere during positive IMF Bz periods, through the formation of magnetospheric lobe cell convection driven by persistent positive IMF By. The CMIT simulation adds important insight into the role of dayside coupling during intervals of otherwise quiet geomagnetic activity. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983449464&doi=10.1002%2f2016GL069834&partnerID=40&md5=6a1f6c421e5b5118956f7297e9341e8c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9724
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Zhang B.,Wang W.,Wu Q.,et al. Effects of magnetospheric lobe cell convection on dayside upper thermospheric winds at high latitudes[J]. Geophysical Research Letters,2016-01-01,43(16).