DOI: 10.1002/2014GL060213
论文题名: Laboratory chambermeasurements of the longwave extinction spectra and complex refractive indices of African and Asian mineral dusts
作者: Di Biagio C. ; Formenti P. ; Styler S.A. ; Pangui E. ; Doussin J.-F.
刊名: Geophysical Research Letters
ISSN: 0094-9823
EISSN: 1944-9554
出版年: 2014
卷: 41, 期: 17 起始页码: 6289
结束页码: 6297
语种: 英语
Scopus关键词: Minerals
; Particle size
; Particle size analysis
; Refractive index
; Size distribution
; Chamber experiments
; Coarse particles
; Complex refractive index
; Dust extinctions
; Extinction spectra
; Long range transport
; Radiative effects
; Spectral dependences
; Dust
; aerosol
; dust
; laboratory method
; long range transport
; longwave radiation
; measurement method
; mineral
; mineralogy
; numerical model
; optical property
; particle size
; refraction
; size distribution
; Gobi Desert
; Niger [Nigeria]
; Nigeria
; Tunisia
英文摘要: In this study we present the first results from laboratory chamber experiments newly designed to investigate the longwave optical properties of mineral dust. Extinction spectra in the 2-16 μm range have been measured in situ (T = 293 K, RH<2%) for polydispersed pure dust aerosols generated from natural parent soils from Tunisia, Niger, and the Gobi desert. Data are used in combination with particle size distributions to estimate the complex refractive index of each dust sample. Our results show that the magnitude and spectral dependence of the dust extinction and refractive indices differ according to particle mineralogy, suggesting the necessity for regionally resolved optical properties for modeling dust radiative effects in the longwave. The magnitude of extinction is controlled by the particle size distribution and remains significant down to low coarse particle concentrations, indicating that the longwave effect of mineral dust persists throughout long-range transport and is thus relevant at the global scale. © 2014. American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906802547&doi=10.1002%2f2014GL060213&partnerID=40&md5=34f31f1ffef418fd40aba0bc0fa58e2c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7087
Appears in Collections: 气候减缓与适应
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作者单位: LISA, Université Paris Est Créteil et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
Recommended Citation:
Di Biagio C.,Formenti P.,Styler S.A.,et al. Laboratory chambermeasurements of the longwave extinction spectra and complex refractive indices of African and Asian mineral dusts[J]. Geophysical Research Letters,2014-01-01,41(17).