DOI: 10.1002/2014GL062390
论文题名: Measurements of the vertical fluxes of atomic Fe and Na at the mesopause: Implications for the velocity of cosmic dust entering the atmosphere
作者: Huang W. ; Chu X. ; Gardner C.S. ; Carrillo-Sánchez J.D. ; Feng W. ; Plane J.M.C. ; Nesvorný D.
刊名: Geophysical Research Letters
ISSN: 0094-9070
EISSN: 1944-8801
出版年: 2015
卷: 42, 期: 1 起始页码: 169
结束页码: 175
语种: 英语
英文关键词: chemical ablation model
; cosmic dust
; Fe and Na lidars
; global meteor influx
; velocity distribution of meteoroids
; vertical flux of constituent
Scopus关键词: Ablation
; Atoms
; Cosmology
; Earth atmosphere
; Optical radar
; Sodium
; Upper atmosphere
; Velocity
; Velocity distribution
; Ablated materials
; Ablation model
; Cosmic dusts
; global meteor influx
; Measurements of
; University of Colorado
; University of Leeds
; Vertical fluxes
; Dust
; comet
; global perspective
; interplanetary dust
; lidar
; mass transport
; mesopause
; meteorite
; vertical profile
英文摘要: The downward fluxes of Fe and Na, measured near the mesopause with the University of Colorado lidars near Boulder, and a chemical ablation model developed at the University of Leeds, are used to constrain the velocity/mass distribution of the meteoroids entering the atmosphere and to derive an improved estimate for the global influx of cosmic dust. We find that the particles responsible for injecting a large fraction of the ablated material into the Earth's upper atmosphere enter at relatively slow speeds and originate primarily from the Jupiter Family of Comets. The global mean Na influx is 17,200 ± 2800 atoms/cm2/s, which equals 298 ± 47 kg/d for the global input of Na vapor and 150 ± 38 t/d for the global influx of cosmic dust. The global mean Fe influx is 102,000 ± 18,000 atoms/cm2/s, which equals 4.29 ± 0.75 t/d for the global input of Fe vapor. Key Points Small Fe/Na flux ratio indicates cosmic dust enters atmosphere at slow velocity The majority of the mass influx originates from the Jupiter Family of Comets The total cosmic dust influx is estimated to be 150 ± 38 t/d ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921814218&doi=10.1002%2f2014GL062390&partnerID=40&md5=59be8accaa2e4529ae199b8a225b2aa6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8686
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: Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Huang W.,Chu X.,Gardner C.S.,et al. Measurements of the vertical fluxes of atomic Fe and Na at the mesopause: Implications for the velocity of cosmic dust entering the atmosphere[J]. Geophysical Research Letters,2015-01-01,42(1).