| DOI: | 10.1002/2014GL062411
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| 论文题名: | First 3-D simulations of meteor plasma dynamics and turbulence |
| 作者: | Oppenheim M.M.; Dimant Y.S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8972
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| EISSN: | 1944-8703
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| 出版年: | 2015
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| 卷: | 42, 期:3 | | 起始页码: | 681
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| 结束页码: | 687
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| 语种: | 英语
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| 英文关键词: | ionosphere
; meteor
; plasma
; simulation
; turbulence
; waves
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| Scopus关键词: | Dynamics
; Earth atmosphere
; Electric fields
; Ionosphere
; Ionospheric measurement
; Meteor impacts
; Plasma diagnostics
; Plasma turbulence
; Plasmas
; Radar
; Turbulence
; Upper atmosphere
; Waves
; Complex Processes
; Earth's magnetic field
; Meteor
; Plasma dynamics
; Plasma evolution
; Radar observations
; Simulation
; Strong electric fields
; Radar measurement
; atmospheric electricity
; electric field
; ionosphere
; meteor
; plasma
; three-dimensional modeling
; turbulence
; wind shear
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| 英文摘要: | Millions of small but detectable meteors hit the Earth's atmosphere every second, creating trails of hot plasma that turbulently diffuse into the background atmosphere. For over 60 years, radars have detected meteor plasmas and used these signals to infer characteristics of the meteoroid population and upper atmosphere, but, despite the importance of meteor radar measurements, the complex processes by which these plasmas evolve have never been thoroughly explained or modeled. In this paper, we present the first fully 3-D simulations of meteor evolution, showing meteor plasmas developing instabilities, becoming turbulent, and inhomogeneously diffusing into the background ionosphere. These instabilities explain the characteristics and strength of many radar observations, in particular the high-resolution nonspecular echoes made by large radars. The simulations reveal how meteors create strong electric fields that dig out deep plasma channels along the Earth's magnetic fields. They also allow researchers to explore the impacts of the intense winds and wind shears, commonly found at these altitudes, on meteor plasma evolution. This study will allow the development of more sophisticated models of meteor radar signals, enabling the extraction of detailed information about the properties of meteoroid particles and the atmosphere. © 2015 The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925153822&doi=10.1002%2f2014GL062411&partnerID=40&md5=a37759aed83614573e6d430c10343d97
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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/8588
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| 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: | Center for Space Physics, Boston University, Boston, MA, United States
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| Recommended Citation: | |
Oppenheim M.M.,Dimant Y.S.. First 3-D simulations of meteor plasma dynamics and turbulence[J]. Geophysical Research Letters,2015-01-01,42(3).
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