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| Titel |
Optical properties of different aerosol types: seven years of combined Raman-elastic backscatter lidar measurements in Thessaloniki, Greece |
| VerfasserIn |
E. Giannakaki, D. S. Balis, V. Amiridis, C. Zerefos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 3, no. 3 ; Nr. 3, no. 3 (2010-05-10), S.569-578 |
| Datensatznummer |
250001106
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| Publikation (Nr.) |
 copernicus.org/amt-3-569-2010.pdf |
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| Zusammenfassung |
| We present our combined Raman/elastic backscatter lidar observations which
were carried out at the EARLINET station of Thessaloniki, Greece, during the
period 2001–2007. The largest optical depths are observed for Saharan dust
and smoke aerosol particles. For local and continental polluted aerosols the
measurements indicate high aerosol loads. However, measurements associated
with the local path indicate enhanced aerosol load within the Planetary
Boundary Layer. The lowest value of aerosol optical depth is observed for
continental aerosols, from West directions with less free tropospheric
contribution. The largest lidar ratios, of the order of 70 sr, are found for
biomass burning aerosols. A significant and distinct correlation between
lidar ratio and backscatter related Ångström exponent values were
estimated for different aerosol categories. Scatter plot between lidar ratio
values and Ångström exponent values for local and continental
polluted aerosols does not show a significant correlation, with a large
variation in both parameters possibly due to variable absorption
characteristics of these aerosols. Finally for continental aerosols with
west and northwest directions that follow downward movement when arriving at
our site constantly low lidar ratios almost independent of size are found. |
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