Arid
DOI10.1016/j.atmosres.2014.10.015
Aerosol scattering and absorption Angstrom exponents as indicators of dust and dust-free days over Granada (Spain)
Valenzuela, A.1,2; Olmo, F. J.1,2; Lyamani, H.1,2; Anton, M.3; Titos, G.1,2; Cazorla, A.1,2; Alados-Arboledas, L.1,2
通讯作者Valenzuela, A.
来源期刊ATMOSPHERIC RESEARCH
ISSN0169-8095
EISSN1873-2895
出版年2015
卷号154页码:1-13
英文摘要

This paper focuses on the assessment of atmospheric aerosol optical properties at the surface and in atmospheric column during both desert dust and dust-free conditions over Granada, South-eastern Iberian Peninsula. Indeed, the spectral dependence of aerosol absorption and scattering properties is analyzed in detail. The analyzed period ranges from June 2008 to December 2010. On dusty days, the mean scattering Angstrom exponent value obtained in the atmospheric column (SAE(col)) (0.5 +/- 0.3) was lower than the observed at the surface level (SAE(is)) (1.3 +/- 0.6), indicating higher contribution of coarse particles at high atmospheric level than at ground level during the analyzed dust events. In addition, it is noticed that the absorption Angstrom exponent in the atmospheric column (AAE(col)) with mean value of 1.5 +/- 0.2 and at the surface (AAE(is)) with mean value of 1.3 +/- 0.2 obtained during dusty situations are indicative of mixture of desert dust and black carbon particles as dominant absorbers both in the atmospheric column and at the surface during dust intrusions over Granada. On the other hand, a non-parametric test (KolmogorovSmirnov) revealed that no significant statistical difference was found for AAE(is) between desert dust and free-dust conditions. This result may be due to the important contribution of urban absorbing aerosol (e.g. Black carbon) at ground level in the study location. Therefore, these parameters (AAE(col) and AAE(is)) are not very useful to detect desert dust events without the use of other information (e.g., aerosol size) over urban area like Granada. A dust extreme event was analyzed in order to retrieve optical parameters during situation dominated by desert dust. The values of SAE(col) and SAE(is) obtained during this extreme event were in agreement with the values showed above for the period 2008-2010, although the differences between dust-free and dust conditions are more noticeable in this special event. (C) 2014 Elsevier B.V. All rights reserved.


英文关键词Desert dust events Anthropogenic aerosol Passive remote sensing In situ instruments Aerosol scattering Absorption Angstrom exponents
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000348625500001
WOS关键词FILTER-BASED MEASUREMENTS ; VISIBLE-LIGHT ABSORPTION ; OPTICAL-PROPERTIES ; SAHARAN DUST ; RADIATIVE PROPERTIES ; SOUTHEASTERN SPAIN ; ATMOSPHERIC AEROSOLS ; SPECTRAL DEPENDENCE ; COLUMNAR PROPERTIES ; IBERIAN PENINSULA
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/2XILL650/186130
作者单位1.Univ Granada, Dept Fis Aplicada, Granada 18006, Spain;
2.Univ Granada, IISTA, Grp Fis Atmosfera, Granada 18006, Spain;
3.Univ Extremadura, Dept Fis, E-06071 Badajoz, Spain
推荐引用方式
GB/T 7714
Valenzuela, A.,Olmo, F. J.,Lyamani, H.,et al. Aerosol scattering and absorption Angstrom exponents as indicators of dust and dust-free days over Granada (Spain)[J],2015,154:1-13.
APA Valenzuela, A..,Olmo, F. J..,Lyamani, H..,Anton, M..,Titos, G..,...&Alados-Arboledas, L..(2015).Aerosol scattering and absorption Angstrom exponents as indicators of dust and dust-free days over Granada (Spain).ATMOSPHERIC RESEARCH,154,1-13.
MLA Valenzuela, A.,et al."Aerosol scattering and absorption Angstrom exponents as indicators of dust and dust-free days over Granada (Spain)".ATMOSPHERIC RESEARCH 154(2015):1-13.
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