Multi-wavelength Raman lidar, sun photometric and aircraft measurements in combination with inversion models for the estimation of the aerosol optical and physico-chemical properties over Athens, Greece

Mamouri, RE; Papayannis, A; Amiridis, V; Muller, D; Kokkalis, P; Rapsomanikis, S; Karageorgos, ET; Tsaknakis, G; Nenes, A; Kazadzis, S; Remoundaki, E

dc.contributor.author	Mamouri, RE	en
dc.contributor.author	Papayannis, A	en
dc.contributor.author	Amiridis, V	en
dc.contributor.author	Muller, D	en
dc.contributor.author	Kokkalis, P	en
dc.contributor.author	Rapsomanikis, S	en
dc.contributor.author	Karageorgos, ET	en
dc.contributor.author	Tsaknakis, G	en
dc.contributor.author	Nenes, A	en
dc.contributor.author	Kazadzis, S	en
dc.contributor.author	Remoundaki, E	en
dc.date.accessioned	2014-03-01T02:11:30Z
dc.date.available	2014-03-01T02:11:30Z
dc.date.issued	2012	en
dc.identifier.issn	18671381	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29920
dc.subject.other	aerosol composition	en
dc.subject.other	aerosol property	en
dc.subject.other	airborne survey	en
dc.subject.other	albedo	en
dc.subject.other	biomass burning	en
dc.subject.other	haze	en
dc.subject.other	lidar	en
dc.subject.other	mixing ratio	en
dc.subject.other	numerical model	en
dc.subject.other	photometer	en
dc.subject.other	physicochemical property	en
dc.subject.other	refractive index	en
dc.subject.other	sulfate	en
dc.subject.other	troposphere	en
dc.subject.other	urban atmosphere	en
dc.subject.other	vertical profile	en
dc.subject.other	water vapor	en
dc.subject.other	Athens [Attica]	en
dc.subject.other	Attica	en
dc.subject.other	Greece	en
dc.title	Multi-wavelength Raman lidar, sun photometric and aircraft measurements in combination with inversion models for the estimation of the aerosol optical and physico-chemical properties over Athens, Greece	en
heal.type	journalArticle	en
heal.identifier.primary	10.5194/amt-5-1793-2012	en
heal.identifier.secondary	http://dx.doi.org/10.5194/amt-5-1793-2012	en
heal.publicationDate	2012	en
heal.abstract	A novel procedure has been developed to retrieve, simultaneously, the optical, microphysical and chemical properties of tropospheric aerosols with a multi-wavelength Raman lidar system in the troposphere over an urban site (Athens, Greece: 37.9° N, 23.6° E, 200 m a.s.l.) using data obtained during the European Space Agency (ESA) THERMOPOLIS project, which took place between 15-31 July 2009 over the Greater Athens Area (GAA). We selected to apply our procedure for a case study of intense aerosol layers that occurred on 20-21 July 2009. The National Technical University of Athens (NTUA) EOLE 6-wavelength Raman lidar system has been used to provide the vertical profiles of the optical properties of aerosols (extinction and backscatter coefficients, lidar ratio) and the water vapor mixing ratio. An inversion algorithm was used to derive the mean aerosol microphysical properties (mean effective radius (reff), single-scattering albedo ω) and mean complex refractive index (m)) at selected heights in the 2-3 km height region. We found that reff was 0.14-0.4 (±0.14) μm, ω; was 0.63-0.88 (±0.08) (at 532 nm) and m ranged from 1.44 (±0.10) + 0.01 (±0.01)i to 1.55 (±0.12) + 0.06 (±0.02)i, in good agreement (only for the reff values) with in situ aircraft measurements. The water vapor and temperature profiles were incorporated into the ISORROPIA II model to propose a possible in situ aerosol composition consistent with the retrieved m and ω values. The retrieved aerosol chemical composition in the 2-3 km height region gave a variable range of sulfate (0-60%) and organic carbon (OC) content (0-50%), although the OC content increased (up to 50%) and the sulfate content dropped (up to 30%) around 3 km height; the retrieved low ω value (0.63), indicates the presence of absorbing biomass burning smoke mixed with urban haze. Finally, the retrieved aerosol microphysical properties were compared with column-integrated sun photometer CIMEL data. © 2012 Author(s). CC Attribution 3.0 License.	en
heal.journalName	Atmospheric Measurement Techniques	en
dc.identifier.doi	10.5194/amt-5-1793-2012	en
dc.identifier.volume	5	en
dc.identifier.issue	7	en
dc.identifier.spage	1793	en
dc.identifier.epage	1808	en