DOI: 10.1002/jgrd.50324
论文题名: Characterization of fresh and aged biomass burning events using multiwavelength Raman lidar and mass spectrometry
作者: Nicolae D. ; Nemuc A. ; Müller D. ; Talianu C. ; Vasilescu J. ; Belegante L. ; Kolgotin A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 7 起始页码: 2956
结束页码: 2965
语种: 英语
Scopus关键词: Atmospheric aerosols
; Mass spectrometry
; Particle size analysis
; Refractive index
; Smoke
; Aerosol mass spectrometers
; Aerosol properties
; Atmospheric evolution
; Meteorological condition
; Microphysical parameters
; Microphysical property
; Optical parameter
; Single-scattering albedo
; Optical radar
; aerosol composition
; aging
; albedo
; biomass burning
; data set
; lidar
; long range transport
; mass spectrometry
; particle size
; refractive index
; size distribution
; smoke
英文摘要: This paper focuses on optical and microphysical properties of long-range transported biomass burning (BB) aerosols and their variation with atmospheric evolution (ageing), as observed by a multiwavelength Raman lidar, part of EARLINET (European Aerosol LIdar NETwork). Chemical analysis of the atmospheric aerosol was done using a colocated aerosol mass spectrometer (AMS). One relevant optical parameter for the ageing process is the Ångström exponent. In our study, we find that it decreases from 2 for fresh to 1.4-0.5 for aged smoke particles. The ratio of lidar (extinction-to-backscatter) ratios (LR 532 /LR355 ) changes rapidly from values <1 for fresh to >1 for aged particles. The imaginary part of the refractive index is the most sensitive microphysical parameter. It decreases sharply from 0.05 to less than 0.01 for fresh and aged smoke particles, respectively. Singlescattering albedo (SSA) varies from 0.74 to 0.98 depending on aerosol age and source. The AMS was used to measure the marker ions of wood-burning particles during 2 days of measurements when the meteorological conditions favored the downward mixing of aerosols from lofted layers. Particle size distribution and particle effective radius from both AMS and lidar are similar, i.e., particle effective radii were approximately 0.27 μm for fresh BB aerosol particles. Microphysical aerosol properties from inversion of the lidar data agree with similar studies carried out in different regions on the globe. Our study shows that the Ångström exponent LR532 /LR355 and the imaginary part of the refractive index can be used to clearly distinguish between fresh and aged smoke particles. © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63847
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: National Institute of Research and Development for Optoelectronics, 409 Atomistilor Street, Magurele, Ilfov RO77125, Romania; Leibniz Institute for Tropospheric Research (IfT), Leipzig, Germany; Gwangju Institute of Science and Technology (GIST), Buk-Gu, Gwangju, South Korea; University of Hertfordshire College, Hatfield, Herts, United Kingdom; Science Systems and Applications, NASA Langley Research Center, Hampton, VA, United States; Physics Instrumentation Center, Troitsk, Moscow, Russian Federation
Recommended Citation:
Nicolae D.,Nemuc A.,Müller D.,et al. Characterization of fresh and aged biomass burning events using multiwavelength Raman lidar and mass spectrometry[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(7)