Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2010JD014139 |
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
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ISSN | 2169-897X |
EISSN | 2169-8996 |
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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