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Title: Comparison of aerosol optical thickness with in situ visibility data over Cyprus
Authors: Retalis, Adrianos 
Hadjimitsis, Diofantos G. 
Michaelides, Silas 
Tymvios, Filippos S. 
Chrysoulakis, Nektarios 
Themistocleous, Kyriacos 
Clayton, C. R I 
Major Field of Science: Engineering and Technology
Field Category: Environmental Engineering
Keywords: Atmospheric aerosols;Urban atmosphere
Issue Date: 5-Mar-2010
Source: Natural Hazards and Earth System Sciences, 2010, vol. 10, pp. 421–428
Volume: 10
Start page: 421
End page: 428
Journal: Natural Hazards and Earth System Sciences 
Abstract: The monitoring of aerosol concentrations comprises a high environmental priority, particularly in urban areas. Remote sensing of atmospheric aerosol optical thickness (AOT) could be used to assess particulate matter levels at the ground. However, such measurements often need further validation. In this study, aerosol data retrieved from satellite and sun-photometer, on the one hand, and visibility data at various locations in Cyprus, on the other hand, for the period from January to June 2009 are contrasted. The results obtained by the direct comparison between MODIS and handheld sun-photometer AOT data exhibited a significant correlation (r=0.83); these results are in agreement with those reported by the National Aeronautics and Space Administration (NASA). The correlation between sun-photometer AOT and that estimated from visibility measurements was also significant (r=0.76). A direct and significant relationship between MODIS AOT and AOT estimated from visibility values was also found for all the locations used (the correlation coefficient was found to vary from 0.80 to 0.84). It is concluded that MODIS AOT data provide accurate information on the aerosol content in Cyprus, while in the absence of such data, visibility measurements could be used as a secondary source of aerosol load information, in terms of aerosol optical thickness, and provide useful information on a near-real time basis, whenever data are available.
ISSN: 1684-9981
DOI: 10.5194/nhess-10-421-2010
Rights: © Author(s)
Attribution-NonCommercial-NoDerivs 3.0 United States
Type: Article
Affiliation : National Observatory of Athens 
Cyprus University of Technology 
Meteorological Service of Cyprus 
University of Southampton 
Appears in Collections:Άρθρα/Articles

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