Arid
DOI10.1002/qj.2557
Role of spheroidal particles in closure studies for aerosol microphysical-optical properties
Sorribas, M.1,2; Olmo, F. J.1,2; Quirantes, A.1,2; Lyamani, H.1,2; Gil-Ojeda, M.3; Alados-Arboledas, L.1,2; Horvath, H.4
通讯作者Sorribas, M.
来源期刊QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
ISSN0035-9009
EISSN1477-870X
出版年2015
卷号141期号:692页码:2700-2707
英文摘要

A study has been carried out to assess the discrepancies between computed and observed aerosol scattering and backscattering properties in the atmosphere. The goals were: (i) to analyse the uncertainty associated with computed optical properties when spherical and spheroidal approximations are used, and (ii) to estimate nephelometry errors due to angular truncation and non-Lambertian illumination of the light source in terms of size range, particle shape and aerosol chemical compounds. Mie and T-matrix theories were used for computing light optical properties for spherical and spheroidal particles, respectively, from observed particle size distributions. The scattering coefficient of the fine mode was not much influenced by the particle shape. However, computed backscattering values underestimated the observed values by approximate to 15%. For the coarse mode, the spheroidal approximation yielded better results than that for spherical particles, especially for backscattering properties. Even after applying the spheroidal approximation, computed scattering and backscattering values within the coarse mode underestimated the observed values by approximate to 49% and approximate to 11%, respectively. The angular correction most widely used to correct the nephelometer data was discussed to explore its uncertainty. In the case of the scattering properties within the coarse mode, the change of the computed optical parameter is approximate to+8% and for the scattering and backscattering values within the fine mode it is lower than approximate to +/- 4% for spherical and spheroidal particles. Additionally, if the spheroidal particles are used to evaluate the aerosol optical properties, the correction must be reconsidered with the aim of reducing the uncertainty found for scattering within the coarse mode. This is recommended for sites with desert dust influence; then the deviation of the computed scattering can be up to 13%.


英文关键词atmospheric aerosol spheroidal particles spherical particles aerosol microphysical properties aerosol optical properties
类型Article
语种英语
国家Spain ; Austria
收录类别SCI-E
WOS记录号WOS:000363865700019
WOS关键词DESERT DUST EVENTS ; LIGHT-SCATTERING ; RADIATIVE PROPERTIES ; INTEGRATING NEPHELOMETER ; SIZE DISTRIBUTION ; LONG-TERM ; CAMPAIGN ; DISTRIBUTIONS ; 3-WAVELENGTH ; SIMULATIONS
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/2XILL650/189963
作者单位1.Univ Granada, Dept Appl Sci, E-18071 Granada, Spain;
2.Univ Granada, Andalusian Inst Earth Syst Res IISTA, E-18071 Granada, Spain;
3.INTA, Atmospher Res & Instrumentat Branch, Madrid, Spain;
4.Univ Vienna, Fac Phys, A-1010 Vienna, Austria
推荐引用方式
GB/T 7714
Sorribas, M.,Olmo, F. J.,Quirantes, A.,et al. Role of spheroidal particles in closure studies for aerosol microphysical-optical properties[J],2015,141(692):2700-2707.
APA Sorribas, M..,Olmo, F. J..,Quirantes, A..,Lyamani, H..,Gil-Ojeda, M..,...&Horvath, H..(2015).Role of spheroidal particles in closure studies for aerosol microphysical-optical properties.QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,141(692),2700-2707.
MLA Sorribas, M.,et al."Role of spheroidal particles in closure studies for aerosol microphysical-optical properties".QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 141.692(2015):2700-2707.
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