DOI: 10.1002/2014GL059922
论文题名: Nonspecular meteor trails from non-field-aligned irregularities: Can they be explained by presence of charged meteor dust?
作者: Chau J.L. ; Strelnikova I. ; Schult C. ; Oppenheim M.M. ; Kelley M.C. ; Stober G. ; Singer W.
刊名: Geophysical Research Letters
ISSN: 0094-10055
EISSN: 1944-9786
出版年: 2014
卷: 41, 期: 10 起始页码: 3336
结束页码: 3343
语种: 英语
英文关键词: high Schmidt numbers
; long-duration meteor trails
; meteor dust
; nonspecular meteors
; PMSE
Scopus关键词: Ionization of gases
; Magnetohydrodynamics
; Meteor impacts
; Plasma theory
; Field-aligned irregularities
; High Schmidt numbers
; Mesospheric summer echoes
; Meteor trails
; Meteoric materials
; nonspecular meteors
; PMSE
; Temperature estimation
; Dust
; dimensionless number
; dust
; interferometry
; meteor
; turbulent flow
英文摘要: Nonspecular meteor echoes have been associated with field-aligned irregularities and have been observed at low-latitude and midlatitude sites. We present observations obtained at high latitudes with range-time features that resemble those at lower latitudes. However, these echoes cannot come from field-aligned irregularities, since the radar-pointing angles are almost parallel to the magnetic field. Using interferometry, we have been able to discriminate space and time features. Our echoes could be qualitatively explained by the presence of charged dust forming from the meteoric material immersed in a turbulent flow. This can lead to a high Schmidt number plasma that can sustain meter-scale turbulence just as it does for the polar mesospheric summer echoes. These rare events require relatively large meteoroids. The result emphasizes the importance of charged dust in understanding all long-duration nonspecular meteor echoes. This dust will extend their diffusion times and will affect temperature estimations from specular echoes. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902293284&doi=10.1002%2f2014GL059922&partnerID=40&md5=93859500ec935860a305e38ad9c135df
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7319
Appears in Collections: 气候减缓与适应
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作者单位: Leibniz Institute of Atmospheric Physics, University of Rostock, Kühlungsborn, Germany
Recommended Citation:
Chau J.L.,Strelnikova I.,Schult C.,et al. Nonspecular meteor trails from non-field-aligned irregularities: Can they be explained by presence of charged meteor dust?[J]. Geophysical Research Letters,2014-01-01,41(10).