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dc.contributor.authorValenzuela, A.es_ES
dc.contributor.authorOlmo Reyes, Francisco José es_ES
dc.contributor.authorLyamani, H.es_ES
dc.contributor.authorAntón, Manueles_ES
dc.contributor.authorTitos Vela, Gloriaes_ES
dc.contributor.authorCazorla Cabrera, Albertoes_ES
dc.contributor.authorAlados-Arboledas, Lucases_ES
dc.identifier.citationValenzuela, A.; et al. Aerosol scattering and absorption Angström exponents as indicators of dust and dust-free days over Granada (Spain). Atmospheric Research, 154(1): 1-13 (2015). []es_ES
dc.description.abstractThis 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 are analyzed in detail. The analyzed period ranges from June 2008 to December 2010. On dusty days, the mean scattering Angström exponent value obtained in the atmospheric column (SAEcol) (0.5±0.3) was lower than the observed at the surface level (SAEis) (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 Angström exponent in the atmospheric column (AAEcol) with mean value of 1.5±0.2 and at the surface (AAEis) 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 (Kolmogorov-Smirnov) revealed that no significant statistical difference was found for AAEis 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 (AAEcol and AAEis) 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 SAEcol and SAEis 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 Aerosol scattering and absorption Angström exponent as indicators of dust and dust-free days over Granada (Spain).en_EN
dc.description.sponsorshipThis work was supported by the Andalusia Regional Government through projects P12-RNM-2409 and P10-RNM-6299, by the Spanish Ministry of Science and Technology through projects CGL2010-18782, CSD2007-00067, CGL2011-29921-C02-01 and CGL2011-13580-E/CLI.en_EN
dc.description.sponsorshipManuel Antón thanks the Ministerio de Ciencia e Innovación and Fondo Social Europeo for the award of a postdoctoral grant (Ramón y Cajal).en
dc.description.sponsorshipCIMEL Calibration was performed at the AERONET-EUROPE calibration center, supported by ACTRIS (European Union Seventh Framework Program (FP7/2007-2013) under grant agreement no. 262254.en
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs 3.0 Licenseen_EN
dc.subjectDesert dust eventsen_EN
dc.subjectAnthropogenic aerosolen_EN
dc.subjectPassive remote sensingen_EN
dc.subjectIn situ instrumentsen_EN
dc.subjectAerosol scatteringen_EN
dc.subjectAbsorption Angström exponentsen_EN
dc.titleAerosol scattering and absorption Angström exponents as indicators of dust and dust-free days over Granada (Spain)en_EN

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