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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/48989

Title: Synergic estimation of columnar integrated aerosol properties and their vertical resolved profiles in respect to the scenarios of dust intrusions over Granada
Authors: Mandija, Florian
Guerrero-Rascado, Juan Luis
Lyamani, H.
Granados-Muñoz, María José
Alados-Arboledas, Lucas
Issue Date: Nov-2016
Abstract: In this paper, we present a study of the columnar and vertically resolved aerosol optical properties over Granada (Spain) during dust events detected during July-August in the period 2012e2013. For this purpose, we classified the events according to their origins and pathways. The analyzed aerosol prop- erties include; columnar aerosol optical properties like aerosol optical depth (AOD) and Angstrom exponent (AE), as well as the lidar products, like backscatter-related Angstrom exponent and linear particle depolarization ratio (LDPR). The lidar profiles are used for determination of the geometrical structure of dust layers and the aerosol optical parameters inside dust layers. There are identified 58 dusty days over Granada during the periods July-August, 2012e2013. In 71% of the dust, event analyzed the dust plume over Granada is located between 3000 and 4000 m a.g.l. Mean values of AOD500 according to the Atlantic and Mediterranean pathway were 0.28 ± 0.10 and 0.93 ± 0.17. Meanwhile, the mean values of AE440-870 were 0.57 ± 0.25 and 0.43 ± 0.20. Three region are identified as the main dust sources affecting the dust intrusions over Granada. Two principal pathways of air masses during dust intrusion over Granada were observed: through Atlantic (52.7%) and through Mediterranean (47.3%). Air masses which come through the Mediterranean present larger AOD and lower Angstrom exponent values than those air masses coming through Atlantic. Lidar measurements show different vertical distributions on particle backscatter coefficient, during different scenarios of dust intrusions. The lidar profiles indicate that average base and top heights of all dust during the investigation period were 2.1 ± 0.7 and 4.8 ± 0.9 km, and their center of mass and thickness were 3.3 ± 0.7 and 2.8 ± 1.0 km a.g.l. The AE355/532 profiles for the dust intrusions present some differences depending on the source regions and path followed by the dust. On the other hand, the profiles of LPDRat 532 nm were more similar for all scenarios.
Sponsorship: This work was supported by the Andalusia Regional Government through project P12-RNM-2409, by the Spanish Ministry of Economy and Competitiveness through project CGL2013-45410-R and by the European Union's Horizon 2020 Research and Innovation Programme through project ACTRIS-2 (grant agreement No. 654109).
Publisher: Elsevier
Description: This is a preprint version of a paper accepted to be published in "Mandija, F.; et al. Synergic estimation of columnar integrated aerosol properties and their vertical resolved profiles in respect to the scenarios of dust intrusions over Granada. Atmospheric Environment, 145: 439-454 (2016)", doi: https://doi.org/10.1016/j.atmosenv.2016.09.045
Keywords: Dust intrusion scenarios
Aerosol optical properties
Sunphotometer and lidar measurements
URI: http://hdl.handle.net/10481/48989
ISSN: 1352-2310
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Mandija, F.; et al. Synergic estimation of columnar integrated aerosol properties and their vertical resolved profiles in respect to the scenarios of dust intrusions over Granada. Atmospheric Environment, 145: 439-454 (2016). [http://hdl.handle.net/10481/48989]
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