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dc.contributor.authorBasart, S.
dc.contributor.authorPérez García-Pando, Carlos
dc.contributor.authorCuevas, Emilio
dc.contributor.authorBaldasano Recio, José María
dc.contributor.authorGobbi, P.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Projectes d'Enginyeria
dc.date.accessioned2010-08-02T12:07:55Z
dc.date.available2010-08-02T12:07:55Z
dc.date.created2009-11-03
dc.date.issued2009-11-03
dc.identifier.citationBasart, S. [et al.]. Aerosol characterization in Northern Africa, Northeastern Atlantic, Mediterranean Basin and Middle East from direct-sun AERONET observations. "Atmospheric chemistry and physics", 03 Novembre 2009, vol. 9, núm. 21, p. 8265-8282.
dc.identifier.issn1680-7316
dc.identifier.urihttp://hdl.handle.net/2117/8554
dc.description.abstractWe proviede an atmospheric aerosol characterization for North Africa, Northeastern Atlantic, Mediterranean and Middle East based on the analysis of quality-assured direct-sun observations of 39 stations of the AErosol RObotic NETwork (AERONET) which include at least an annual cycle within the 1994–2007 period. We extensively test and apply the recently introduced graphical method of Gobbi and co-authors to track and discriminate different aerosol types and quantify the contribution of mineral dust. The method relies on the combined analysis of the Ångström exponent (α) and its spectral curvature δα. Plotting data in these coordinates allows to infer aerosol fine mode radius (Rf) and fractional contribution (η) to total Aerosol Optical Depth (AOD) and separate AOD growth due to fine-mode aerosol humidification and/or coagulation from AOD growth due to the increase in coarse particles or cloud contamination. Our results confirm the robustness of this graphical method. Large mineral dust is found to be the most important constituent in Northern Africa and Middle East. Under specific meteorological conditions, its transport to Southern Europe is observed from spring to autumn and decreasing with latitude. We observe "pure Saharan dust" conditions to show AOD>0.7 (ranging up to 5), α<0.3 and δα<0 corresponding to η<40% and (Rf)~0.13 μm. Small pollution particles are abundant in sites close to urban and industrial areas of Continental and Eastern Europe and Middle East, as well as, important contributions of biomass burning are observed in the sub-Sahel region in winter. These small aerosols are associated to AOD<1, α>1.5 and δα~−0.2 corresponding to η>70% and Rf~0.13 μm. Here, dust mixed with fine pollution aerosols shifts the observations to the region α<0.75, in which the fine mode contribution is less than 40%.
dc.format.extent18 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Física::Física de fluids::Física de gasos
dc.subject.lcshAtmospheric aerosols -- North Africa
dc.subject.lcshAtmospheric aerosols -- Northeastern Atlantic
dc.subject.lcshAtmospheric aerosols -- Mediterranean
dc.subject.lcshAtmospheric aerosols -- Middle East
dc.subject.lcshAERONET ( AErosol RObotic NETwork)
dc.titleAerosol characterization in Northern Africa, Northeastern Atlantic, Mediterranean Basin and Middle East from direct-sun AERONET observations
dc.typeArticle
dc.subject.lemacAerosols -- Mesurament
dc.contributor.groupUniversitat Politècnica de Catalunya. MTA - Modelització i Tecnologia Ambiental
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.atmos-chem-phys.net/9/8265/2009/
dc.rights.accessOpen Access
local.identifier.drac2630826
dc.description.versionPostprint (published version)
local.citation.authorBasart, S.; Pérez, C.; Cuevas, E.; Baldasano, J.; Gobbi, P.
local.citation.publicationNameAtmospheric chemistry and physics
local.citation.volume9
local.citation.number21
local.citation.startingPage8265
local.citation.endingPage8282


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