Arid
DOI10.1029/2010JD014139
Application of randomly oriented spheroids for retrieval of dust particle parameters from multiwavelength lidar measurements
Veselovskii, I.1; Dubovik, O.2; Kolgotin, A.1; Lapyonok, T.2; Di Girolamo, P.3; Summa, D.3; Whiteman, D. N.4; Mishchenko, M.5; Tanre, D.2
通讯作者Veselovskii, I.
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2010
卷号115
英文摘要

Multiwavelength (MW) Raman lidars have demonstrated their potential to profile particle parameters; however, until now, the physical models used in retrieval algorithms for processing MW lidar data have been predominantly based on the Mie theory. This approach is applicable to the modeling of light scattering by spherically symmetric particles only and does not adequately reproduce the scattering by generally nonspherical desert dust particles. Here we present an algorithm based on a model of randomly oriented spheroids for the inversion of multiwavelength lidar data. The aerosols are modeled as a mixture of two aerosol components: one composed only of spherical and the second composed of nonspherical particles. The nonspherical component is an ensemble of randomly oriented spheroids with size-independent shape distribution. This approach has been integrated into an algorithm retrieving aerosol properties from the observations with a Raman lidar based on a tripled Nd:YAG laser. Such a lidar provides three backscattering coefficients, two extinction coefficients, and the particle depolarization ratio at a single or multiple wavelengths. Simulations were performed for a bimodal particle size distribution typical of desert dust particles. The uncertainty of the retrieved particle surface, volume concentration, and effective radius for 10% measurement errors is estimated to be below 30%. We show that if the effect of particle nonsphericity is not accounted for, the errors in the retrieved aerosol parameters increase notably. The algorithm was tested with experimental data from a Saharan dust outbreak episode, measured with the BASIL multiwavelength Raman lidar in August 2007. The vertical profiles of particle parameters as well as the particle size distributions at different heights were retrieved. It was shown that the algorithm developed provided substantially reasonable results consistent with the available independent information about the observed aerosol event.


类型Article
语种英语
国家Russia ; France ; Italy ; USA
收录类别SCI-E
WOS记录号WOS:000283945500007
WOS关键词AEROSOL OPTICAL-PROPERTIES ; SPECTRAL-RESOLUTION LIDAR ; SKY RADIANCE MEASUREMENTS ; TO-BACKSCATTER RATIO ; SAHARAN DUST ; RAMAN LIDAR ; LIGHT-SCATTERING ; RADIATIVE PROPERTIES ; SOUTHERN MOROCCO ; RELATIVE-HUMIDITY
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/165234
作者单位1.Phys Instrumentat Ctr, Troitsk 142190, Moscow Region, Russia;
2.Univ Lille 1, CNRS, Opt Atmospher Lab, F-59655 Villeneuve Dascq, France;
3.Univ Basilicata, DIFA, I-85100 Potenza, Italy;
4.NASA, Goddard Space Flight Ctr, Mesoscale Atmospher Proc Branch, Greenbelt, MD 20771 USA;
5.NASA, Goddard Inst Space Studies, New York, NY 10025 USA
推荐引用方式
GB/T 7714
Veselovskii, I.,Dubovik, O.,Kolgotin, A.,et al. Application of randomly oriented spheroids for retrieval of dust particle parameters from multiwavelength lidar measurements[J],2010,115.
APA Veselovskii, I..,Dubovik, O..,Kolgotin, A..,Lapyonok, T..,Di Girolamo, P..,...&Tanre, D..(2010).Application of randomly oriented spheroids for retrieval of dust particle parameters from multiwavelength lidar measurements.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,115.
MLA Veselovskii, I.,et al."Application of randomly oriented spheroids for retrieval of dust particle parameters from multiwavelength lidar measurements".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 115(2010).
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