Assessment of MERIS primary products from coastal regions exhibiting different atmospheric and marine optical properties: the Adriatic and the Baltic Seas.
Giuseppe Zibordi(1), Jean-Francois Berthon(1), Frederic Melin(1), Davide D'Alimonte(2), Seppo Kaitala(3) and Jukka Seppälä(3)
(1) Joint Research Centre, Ispra, 21027 Ispra, Italy
(2) Universitade Nova de Lisbõa, Caparica, Caparica, Portugal
(3) Finnish Institute of Marine Research, Helsinki, 00561 Helsinki, Finland
MERIS primary products from the Adriatic and Baltic Sea waters are assessed using in situ data collected with autonomous above-water systems operated on offshore fixed platforms and included in the AERONET-Ocean Color network. In combination with a general introduction to measuring and calibration methods, processing and quality assurance schemes, and uncertainty estimates for the in situ data, the work presents match-ups of normalized water leaving radiance and aerosol optical thickness for the two selected regions. Results are discussed emphasizing the different atmospheric and marine optical features of the measurement sites: i. the Acqua Alta Oceanographic Tower (AAOT) site in northern Adriatic Sea characterized by relatively high loads of continental aerosols and representing coastal waters exhibiting a large scale variability with a relatively low absorption by yellow substance and a moderate concentration of particles; and ii. the Gustaf Dalen Lighthouse Tower (GDLT) and the Helsinki Lighthouse Tower (HLT) sites in the Baltic Sea characterized by a low load of continental aerosol and representing coastal waters exhibiting low variability with an extremely high absorption by yellow substance.
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,