Improving aerosol optical depth estimations including temperature correction

1. Obregón, M.A.
2. Cancillo, M.L.
3. Serrano, A.
4. Cachorro, V.E.
5. Toledano, C.

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Abstract

This study is aimed at investigating and correcting the dependence with temperature of the aerosol optical depth at 870 nm of the CIMEL #341 sunphotometer. This instrument is installed in the station of Cáceres (Spain) and belongs to the AErosol RObotic NETwork (AERONET). The aerosol optical depths at this channel, as derived by AERONET algorithm, have been compared with those estimated using a new algorithm proposed and validated by our group. A temperature correction was applied to the original voltage signal in order to quantify the magnitude of the mentioned dependence. For this goal, different coefficients were tested, obtaining the value 0.25%/ºC as the most appropriate to correct the influence of the sensor temperature on the aerosol optical depth values at 870 nm.

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