On the origin of seasonal variation of aerosol optical thickness in UV range over Belsk,Poland |
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Authors: | Janusz Jaros?awski Aleksander Pietruczuk |
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Institution: | (1) The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boker Campus, 84990 Sede Boker, Israel;(2) Israel Ministry of the Environment, Tel Aviv, Israel; |
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Abstract: | Aerosol optical thickness (AOT) and seasonal variation of AOT over Belsk, Poland, in the UV wavelength range (310–380 nm)
have been analysed using results of measurements by Brewer spectrophotometer No. 064 and Cimel sunphotometer data for the
2002–2007 period. The comparison of AOT derived from direct Sun measurements by Brewer spectrophotometer in the 310–320 nm
range and retrieved from Cimel measurements at longer wavelengths shows good correlation (R = 0.96), with overestimation of retrieved values compared to the measured ones by about 6%. Basing on aerosol microphysical
properties taken from almucantar retrievals and Mie theory, optical properties of aerosol in the UV range has been calculated.
Analysis of seasonal variation of AOT at Belsk reveals two maxima: in April and July–August. Analysis of back-trajectories
in conjunction with analysis of fire maps from Fire Information For Resource Management System shows that these seasonal maxima
are connected with seasonal biomass burning in Eastern and Southern Europe. |
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