globalchange  > 科学计划与规划
DOI: 10.1002/2015GL065149
论文题名:
On the size and velocity distribution of cosmic dust particles entering the atmosphere
作者: Carrillo-Sánchez J.D.; Plane J.M.C.; Feng W.; Nesvorný D.; Janches D.
刊名: Geophysical Research Letters
ISSN: 0094-8609
EISSN: 1944-8340
出版年: 2015
卷: 42, 期:15
起始页码: 6518
结束页码: 6525
语种: 英语
英文关键词: comets ; cosmic dust ; cosmic spherules ; mesospheric metals ; meteor radar ; meteoric ablation
Scopus关键词: Ablation ; Dust ; Earth atmosphere ; Ionosphere ; Magnesium ; Monte Carlo methods ; Radar ; Radar measurement ; Velocity distribution ; Comets ; Cosmic dust particles ; Cosmic dusts ; Cosmic spherules ; Infrared observations ; Meteor radars ; Monte Carlo sampling ; Relative concentration ; Cosmology ; ablation ; atmospheric modeling ; atmospheric pollution ; comet ; concentration (composition) ; cosmic ray ; dust ; mesosphere ; metal ; meteorite ; particulate matter ; radar ; size distribution ; velocity
英文摘要: The size and velocity distribution of cosmic dust particles entering the Earth's atmosphere is uncertain. Here we show that the relative concentrations of metal atoms in the upper mesosphere, and the surface accretion rate of cosmic spherules, provide sensitive probes of this distribution. Three cosmic dust models are selected as case studies: two are astronomical models, the first constrained by infrared observations of the Zodiacal Dust Cloud and the second by radar observations of meteor head echoes; the third model is based on measurements made with a spaceborne dust detector. For each model, a Monte Carlo sampling method combined with a chemical ablation model is used to predict the ablation rates of Na, K, Fe, Mg, and Ca above 60 km and cosmic spherule production rate. It appears that a significant fraction of the cosmic dust consists of small (<5 μg) and slow (<15 km s-1) particles. ©2015. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940453795&doi=10.1002%2f2015GL065149&partnerID=40&md5=d7443f5fc48d8bb980401faaddb1ad01
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8225
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: School of Chemistry, University of Leeds, Leeds, United Kingdom

Recommended Citation:
Carrillo-Sánchez J.D.,Plane J.M.C.,Feng W.,et al. On the size and velocity distribution of cosmic dust particles entering the atmosphere[J]. Geophysical Research Letters,2015-01-01,42(15).
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