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Validation of OMI Ground UV-Products

Erich Putz(1), Siegfried Gonzi(1) and Bernhard Hubinger(1)

(1) University of Graz, Universitaetsplatz 5, A-8010 Graz, Austria


At the moment there is much work going on in the quantification of aerosols and its role in climate. Aerosols are strongly dependent on time and space and their exact specification is still an unsolved problem. Typically aerosols are accounted for in climate and atmospheric chemistry models by some kind of off-line aerosol data bases. The OPAC (Optical Properties of Aerosols and Clouds) plays a prime role in such off-line considerations. The OPAC is the result of aerosol science studies conducted in the last 20 years. However, the static OPAC tries its best to gather a lot of aerosol optical properties information but there has been no exact validation taken place which compares OPAC results with in-situ measurements on a global scale. The AERONET (AERosol RObotic NETwork) is a very successful worldwide network with the aiming of measuring and retrieving aerosol optical properties all over the world. We show in this poster a method for linking the OPAC data base with AERONET retrievals. We developed a Monte Carlo search algorithm which is capable of searching for solutions in the OPAC data base which best match AERONET retrievals (over Greece). The AERONET delivers only column integrated retrievals whereas OPAC delivers aerosol optical properties based on a combination of aerosol models of different nature. Eventually the results will be used for validation of satellite ground UV-products e.g. OMI data.


Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry