Systematic lidar observations of Saharan dust layers over Athens, Greece in the frame of EARLINET project (2004-2006)

Papayannis, A; Mamouri, RE; Amiridis, V; Kazadzis, S; Perez, C; Tsaknakis, G; Kokkalis, P; Baldasano, JM

dc.contributor.author	Papayannis, A	en
dc.contributor.author	Mamouri, RE	en
dc.contributor.author	Amiridis, V	en
dc.contributor.author	Kazadzis, S	en
dc.contributor.author	Perez, C	en
dc.contributor.author	Tsaknakis, G	en
dc.contributor.author	Kokkalis, P	en
dc.contributor.author	Baldasano, JM	en
dc.date.accessioned	2014-03-01T01:32:02Z
dc.date.available	2014-03-01T01:32:02Z
dc.date.issued	2009	en
dc.identifier.issn	0992-7689	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20028
dc.subject	Atmospheric composition and structure (Aerosols and particles)	en
dc.subject.classification	Astronomy & Astrophysics	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.classification	Meteorology & Atmospheric Sciences	en
dc.subject.other	aerosol	en
dc.subject.other	dust	en
dc.subject.other	lidar	en
dc.subject.other	MODIS	en
dc.subject.other	observational method	en
dc.subject.other	optical depth	en
dc.subject.other	particle size	en
dc.subject.other	size distribution	en
dc.subject.other	spatial distribution	en
dc.subject.other	wavelength	en
dc.subject.other	Athens [Attica]	en
dc.subject.other	Attica	en
dc.subject.other	Greece	en
dc.title	Systematic lidar observations of Saharan dust layers over Athens, Greece in the frame of EARLINET project (2004-2006)	en
heal.type	journalArticle	en
heal.identifier.primary	10.5194/angeo-27-3611-2009	en
heal.identifier.secondary	http://dx.doi.org/10.5194/angeo-27-3611-2009	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	In this paper we present a statistical analysis on the geometrical and optical properties of Saharan dust layers observed over Athens, Greece, in a three-year period from 1 January 2004 up to 31 December 2006. The observations of the vertical aerosol profile were performed by the multi-wavelength (355-532-1064-387-607 nm) Raman lidar system of the National Technical University of Athens (NTUA) operated in the city of Athens (37 degrees 98' N, 23 degrees 77' E), Greece, in the frame of the European Aerosol Research Lidar Network (EARLINET-ASOS) project. The number of dust events was greatest in late spring, summer, and early autumn periods. This was evident also by aerosol observations during dust outbreaks obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS). In our lidar measurements, multiple aerosol dust layers of variable thickness (680-4800 m) were observed. The center of mass of these layers was located in altitudes between 1600 and 5800 m. However, the mean thickness of the dust layer typically stayed around 2700m and the corresponding mean center of mass was of the order of 2900 m. The top of the dust layer ranged from 2000 to 8000 m, with a mean value of the order of 4700 m. MODIS observations during dust outbreaks showed that the AOD values at 550 nm ranged between 0.3-0.6,while the corresponding Angstrom exponent (AE) values were of the order of 0.5-0.65, indicating the presence of rather large particles.	en
heal.publisher	COPERNICUS PUBLICATIONS	en
heal.journalName	Annales Geophysicae	en
dc.identifier.doi	10.5194/angeo-27-3611-2009	en
dc.identifier.isi	ISI:000270321600022	en
dc.identifier.volume	27	en
dc.identifier.issue	9	en
dc.identifier.spage	3611	en
dc.identifier.epage	3620	en