Baltic+ Sea-Land Biogeochemical linkages (SeaLaBio)

    The ESA funded project Baltic+ SeaLaBio will demonstrate the added value of Earth Observation for achieving the Baltic Earth “Grand Challenge 2” goals, and particularly, if combined with biogeochemical modeling. Colored dissolved organic matter (CDOM) is in the focus of this study. CDOM is part of the marine carbon cycle and the vast amount in the Baltic Sea is of terrestrial origin due to high CDOM concentrations in the northern rivers.

    CDOM concentrations in the Baltic are high compared to open ocean waters. Therefore, standard algorithms do not work properly. In SeaLaBio, we will adapt remote sensing algorithms reflecting Baltic Sea conditions.

    With the aid of a 3-dimensional ecosystem model of the Baltic Sea, we will show how modeling can benefit from Earth Observation data in particular with regard to calibration and validation, and providing flux data from land to coast.

    For this project, we need to address scientific and technical issues along a processing and analysis chain:

    • improved atmospheric correction of Sentinel 2 and Sentinel 3 data
    • retrieval of water optical properties and water constituent concentrations
    • exploiting synergistic and complementary use of Sentinel 3 and Sentinel 2
    • retrieval of higher level products: eutrophication and sediment transport
    • improve biogeochemical model calibration and validation