| DOI: | 10.1002/grl.50292
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| 论文题名: | Impact of meridional winds on equatorial spread F: Revisited |
| 作者: | Huba J.D.; Krall J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9196
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| EISSN: | 1944-8927
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| 出版年: | 2013
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| 卷: | 40, 期:7 | | 起始页码: | 1268
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| 结束页码: | 1272
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| 语种: | 英语
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| 英文关键词: | equatorial ionosphere
; equatorial spread F
; ionospheric irregularities
; meridional wind
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| Scopus关键词: | Day-to-day variability
; Destabilizing influences
; Equatorial ionosphere
; Equatorial spread F
; Ionospheric irregularities
; Meridional winds
; Rayleigh-Taylor instabilities
; Stabilizing effects
; Boundary layer flow
; Ionosphere
; Ionospheric measurement
; atmospheric modeling
; diurnal variation
; F region
; meridional circulation
; numerical model
; wind profile
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| 英文摘要: | The impact of meridional winds on the onset and evolution of equatorial spread F (ESF) is studied using the NRL ionosphere model SAMI3/ESF. The prevailing belief is that meridional winds have a stabilizing effect on the onset of ESF. In this letter, it is shown that this is not necessarily the case and that meridional winds can be destabilizing. We find that a wind profile with a positive gradient as a function of latitude (∂V m ∂θ ≥ 0) is a stabilizing influence on the generalized Rayleigh-Taylor instability; a wind profile with a negative gradient (∂V m ∂θ < 0) is a destabilizing influence. Here, a northward wind is positive, and θ increases in the northward direction. It is suggested that meridional wind profiles may account for, in part, the longitudinal and day-to-day variability of ESF. Key Points Meridional winds have latitude gradients Positive wind gradients are stabilizing Negative wind gradients are destabilizing ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876907842&doi=10.1002%2fgrl.50292&partnerID=40&md5=1aaed6bda7510884a8f413539a668e71
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6460
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Plasma Physics Division, Naval Research Laboratory, Washington, DC, United States
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| Recommended Citation: | |
Huba J.D.,Krall J.. Impact of meridional winds on equatorial spread F: Revisited[J]. Geophysical Research Letters,2013-01-01,40(7).
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