Raman lidar and sunphotometric measurements of aerosol optical properties over Thessaloniki, Greece during a biomass burning episode

Balis, DS; Amiridis, V; Zerefos, C; Gerasopoulos, E; Andreae, M; Zanis, P; Kazantzidis, A; Kazadzis, S; Papayannis, A

dc.contributor.author	Balis, DS	en
dc.contributor.author	Amiridis, V	en
dc.contributor.author	Zerefos, C	en
dc.contributor.author	Gerasopoulos, E	en
dc.contributor.author	Andreae, M	en
dc.contributor.author	Zanis, P	en
dc.contributor.author	Kazantzidis, A	en
dc.contributor.author	Kazadzis, S	en
dc.contributor.author	Papayannis, A	en
dc.date.accessioned	2014-03-01T01:19:28Z
dc.date.available	2014-03-01T01:19:28Z
dc.date.issued	2003	en
dc.identifier.issn	1352-2310	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15514
dc.subject	Aerosol	en
dc.subject	Biomass burning	en
dc.subject	Lidar	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Meteorology & Atmospheric Sciences	en
dc.subject.other	Backscattering	en
dc.subject.other	Biomass	en
dc.subject.other	Combustion	en
dc.subject.other	Data acquisition	en
dc.subject.other	Light extinction	en
dc.subject.other	Nephelometers	en
dc.subject.other	Optical properties	en
dc.subject.other	Optical radar	en
dc.subject.other	Radiometers	en
dc.subject.other	Remote sensing	en
dc.subject.other	Spectrophotometers	en
dc.subject.other	Troposphere	en
dc.subject.other	Sunphotometric measurements	en
dc.subject.other	Atmospheric aerosols	en
dc.subject.other	aerosol	en
dc.subject.other	biomass burning	en
dc.subject.other	lidar	en
dc.subject.other	measurement method	en
dc.subject.other	optical depth	en
dc.subject.other	remote sensing	en
dc.subject.other	trajectory	en
dc.subject.other	troposphere	en
dc.subject.other	aerosol	en
dc.subject.other	article	en
dc.subject.other	biomass	en
dc.subject.other	fire	en
dc.subject.other	Greece	en
dc.subject.other	photometry	en
dc.subject.other	priority journal	en
dc.subject.other	radiation detector	en
dc.subject.other	smoke	en
dc.subject.other	spectrophotometer	en
dc.subject.other	troposphere	en
dc.subject.other	ultraviolet radiation	en
dc.subject.other	Greece	en
dc.subject.other	Thessaloniki	en
dc.title	Raman lidar and sunphotometric measurements of aerosol optical properties over Thessaloniki, Greece during a biomass burning episode	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1352-2310(03)00581-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1352-2310(03)00581-8	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	The influence of biomass burning smoke on the aerosol loading in the free troposphere over Thessaloniki, Greece (40.5degreesN, 22.9degreesE) is discussed in this paper. A selected case during summer 2001 is presented, when very high aerosol optical depth values were observed, benefiting from the synergy of various remote sensing instruments. The data that were collected allow the characterization of the optical properties of the aerosols in this region, where only little information has so far been available. Four-day back trajectories indicated that air masses were advected from Bulgaria and the northern coast of the Black Sea, where strong forest fires occurred in early August 2001. In order to investigate the optical properties of biomass burning aerosols, we used a two-wavelength lidar system that combines Raman and elastic-backscatter observations, in addition to a Brewer spectrophotometer, a nephelometer and a multi-filter rotating shadowband radiometer. The lidar measurements on 9 August 2001 recorded an integrated aerosol optical depth at 355 nm of the order of 1.35 during cloud-free conditions. The estimated mean extinction-to-backscatter ratios from the Raman lidar were 60 sr for 355 nm and 50 sr for 532 run. Estimated values of the single scattering albedo, using spectral UV measurements and modeling were of the order of 0.90, consistent with previous findings, indicating a weak contribution of absorption to the total extinction. The Angstrom exponent, calculated from the multi-filter rotating shadowband radiometer exhibited also high values around 1.78, indicating the presence of rather small particles. (C) 2003 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Atmospheric Environment	en
dc.identifier.doi	10.1016/S1352-2310(03)00581-8	en
dc.identifier.isi	ISI:000185670200006	en
dc.identifier.volume	37	en
dc.identifier.issue	32	en
dc.identifier.spage	4529	en
dc.identifier.epage	4538	en