 |
| Titel |
Systematic lidar observations of Saharan dust layers over Athens, Greece in the frame of EARLINET project (2004-2006) |
| VerfasserIn |
A. Papayannis, R. E. Mamouri, V. Amiridis, S. Kazadzis, C. Pérez, G. Tsaknakis, P. Kokkalis, J. M. Baldasano |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 9 ; Nr. 27, no. 9 (2009-09-29), S.3611-3620 |
| Datensatznummer |
250016655
|
| Publikation (Nr.) |
 copernicus.org/angeo-27-3611-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| 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°98' N, 23°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 2700 m 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 Angström exponent (AE) values were of
the order of 0.5–0.65, indicating the presence of rather large particles. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|