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DOI	10.5194/acp-22-355-2022
	First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dust
	Haarig, Moritz; Ansmann, Albert; Engelmann, Ronny; Baars, Holger; Toledano, Carlos; Torres, Benjamin; Althausen, Dietrich; Radenz, Martin; Wandinger, Ulla
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	355
结束页码	369
卷号	22 期号:1 页码:15
英文摘要	Two layers of Saharan dust observed over Leipzig, Germany, in February and March 2021 were used to provide the first-ever lidar measurements of the dust lidar ratio (extinction-to-backscatter ratio) and linear depolarization ratio at all three classical lidar wavelengths (355, 532 and 1064 nm). The pure-dust conditions during the first event exhibit lidar ratios of 47 +/- 8, 50 +/- 5 and 69 +/- 14 sr and particle linear depolarization ratios of 0.242 +/- 0.024, 0.299 +/- 0.018 and 0.206 +/- 0.010 at wavelengths of 355, 532 and 1064 nm, respectively. The second, slightly polluted-dust case shows a similar spectral behavior of the lidar and depolarization ratio with values of the lidar ratio of 49 +/- 4, 46 +/- 5 and 57 +/- 9 sr and the depolarization ratio of 0.174 +/- 0.041, 0.298 +/- 0.016 and 0.242 +/- 0.007 at 355, 532 and 1064 nm, respectively. The results were compared with Aerosol Robotic Network (AERONET) version 3 (v3) inversion solutions and the Generalized Retrieval of Aerosol and Surface Properties (GRASP) at six and seven wavelengths. Both retrieval schemes make use of a spheroid shape model for mineral dust. The spectral slope of the lidar ratio from 532 to 1064 nm could be well reproduced by the AERONET and GRASP retrieval schemes. Higher lidar ratios in the UV were retrieved by AERONET and GRASP. The enhancement was probably caused by the influence of fine-mode pollution particles in the boundary layer which are included in the columnar photometer measurements. Significant differences between the measured and retrieved wavelength dependence of the particle linear depolarization ratio were found. The potential sources for these uncertainties are discussed.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000743985700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273756
作者单位	Leibniz Institut fur Tropospharenforschung (TROPOS); Universidad de Valladolid; Universite de Lille - ISITE; Universite de Lille
推荐引用方式 GB/T 7714	Haarig, Moritz,Ansmann, Albert,Engelmann, Ronny,et al. First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dust[J],2022,22(1):15.
APA	Haarig, Moritz.,Ansmann, Albert.,Engelmann, Ronny.,Baars, Holger.,Toledano, Carlos.,...&Wandinger, Ulla.(2022).First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dust.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(1),15.
MLA	Haarig, Moritz,et al."First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dust".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.1(2022):15.