DOI: 10.1016/j.atmosenv.2014.06.028
Scopus记录号: 2-s2.0-84903489092
论文题名: Single-scattering albedo profiling of mixed asian dust plumes with multiwavelength raman lidar
作者: Noh Y ; M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 95 起始页码: 305
结束页码: 317
语种: 英语
英文关键词: Asian dust
; Depolarization ratios
; Raman lidar
; Single-scattering albedo
Scopus关键词: Backscattering
; Dust
; Optical radar
; Radiometers
; Solar radiation
; Aerosol robotic networks
; Asian dust
; Backscatter coefficients
; Depolarization ratio
; Extinction coefficients
; Particle properties
; Raman LIDAR
; Single-scattering albedo
; Air pollution
; albedo
; atmospheric plume
; dust
; industrial emission
; lidar
; optical property
; radiometer
; smoke
; urban pollution
; aerosol
; albedo
; algorithm
; article
; Asian
; bioseparation
; burn
; comparative study
; depolarization
; dust
; light scattering
; optical depth
; plume
; priority journal
; radiation detector
; smoke
; South Korea
; urban area
; Kwangju [South Korea]
; South Korea
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: This study presents results of vertically-resolved single-scattering albedo of mixed Asian dust plumes, i.e. the total single-scattering albedo. The mixed Asian dust plumes are comprised of a mixture of pure dust particles and the non-dust part, e.g. urban/industrial pollution and smoke from biomass burning. The mixed Asian dust plumes were observed with multiwavelength Raman lidar which provides vertical profiles of particle backscatter coefficients at 355, 532, and 1064nm and extinction coefficients at 355 and 532nm. The optical data serve as input for an inversion algorithm that provides profiles of microphysical particle properties which subsequently are used for computing single-scattering albedo. This study presents results of dust plumes observed on 24 February 2004, 9 and 18 March 2004, 2 April 2004, and 24 February and 4 May 2005. The lidar measurements were carried out at Gwangju (35.10° N, 126.53° E), South Korea. The optical data of the mixed-dust plumes were separated into the pure dust content and the non-dust part. We used the linear particle depolarization ratio measured at 532nm for this separation. The backscatter and extinction coefficients then were used to derive single-scattering albedo of the non-dust part of the mixed-dust plumes. The value 0.96±0.02 at 532nm for the single-scattering albedo of pure dust part was used. This value was obtained from single-scattering albedo of dust observed in various dust source regions. In another step the "total" single-scattering albedo of these mixed-dust plumes was calculated by using the optical depth of the dust and the non-dust part as weighting function. The single-scattering albedo of the non-dust particles of the mixed-dust plume varied from 0.63 to 0.93 for all observations presented in this study. The single-scattering albedo of the mixed-dust plumes was 0.71-0.95, and it was always higher than the single-scattering albedo of the non-dust part of the mixed-dust plumes. Single-scattering albedo varied with height on each measurement day. These differences seem to be quantitatively related to the degree of mixing of dust with urban pollution and the light-absorption properties of the pollution (non-dust) particles in these plumes which traveled along different transport pathways to the lidar site. The layer-mean lidar-derived single-scattering albedos of the examples shown in this study were compared to single-scattering albedo derived from AERONET (Aerosol Robotic Network) Sun/sky radiometer observations. This radiometer is located next to the lidar. The total layer-mean lidar-derived single-scattering albedos (at 532nm) on 18 March and 2 April 2004, and on 24 February and 4 May 2005 were 0.91±0.02, 0.90±0.03, 0.91±0.02, and 0.92±0.02, respectively. The lidar-derived single-scattering albedos are similar to those based on the Sun/sky radiometer data if the different measurement wavelengths of the lidar and Sun/sky radiometer are taken account of. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81217
Appears in Collections: 气候变化事实与影响
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作者单位: The International Environmental Analysis and Education Center(IEAEC), Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu Gwangju 500-712, South Korea
Recommended Citation:
Noh Y,M. Single-scattering albedo profiling of mixed asian dust plumes with multiwavelength raman lidar[J]. Atmospheric Environment,2014-01-01,95