We study the spatial (50 km × 50 km) and temporal distribution of aerosol optical depth (AOD) over the broader Greek area on a mean annual, seasonal and monthly basis. Daily visible Level-2 AOD data (AOD550 nm) from the MODIS database are used for the period March 2000–February 2008. The mean annual AOD values for the study region range from 0.13 to 0.37, with a mean annual regional AOD value equal to 0.19. Maximum AOD values are found in spring and late summer (August), and minimum in winter. The highest values occur in Eastern Greece (particularly during spring and summer) and near the Aegean coasts of Turkey (Smyrni) and Istanbul (during autumn and winter). The smallest AOD values are found in Western Greece, at some areas of the neighboring Balkan countries, and in the interior of Turkey (during all seasons) as well as in marine areas south and east of Crete (during summer). A decreasing tendency of regional AOD is found from 2000 to 2008, equal to Δ(AOD) = −0.05, implying decreasing aerosol amounts over the study region.
Aerosol Optical Depth Anthropogenic Aerosol African Dust Aerosol Optical Depth Data MODIS Aerosol Optical Depth
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