POSTER Session 4

APPLICATION OF HIGH-RESOLUTION SATELLITE IMAGERY TO MONITORING OF FLOODING AND IMPACT ON SEDIMENT FLUXES AND WATER CLARITY IN LONG ISLAND SOUND

Advanced satellite measurements of ocean color can be used to obtain key water quality and ecological parameters in inland and coastal aquatic systems that, in turn, can inform decision making and local-to-global responses to coastal hazards. One of the main challenges for accurate remote sensing of ocean color, especially in coastal urban environments, is correcting for the influence of the atmosphere (i.e., aerosols and trace gases) on the top-of-atmosphere signal measured by a satellite sensor. In this study, we integrated a rich in-situ bio-optical dataset – collected over nearly six years across the heavily urbanized Long Island Sound – with high-resolution atmospheric aerosol and trace gas measurements from a network of land stations as well as shipboard, airborne and satellite sensors to evaluate the effect of urban air pollution on coastal ocean color algorithms. Results were used to validate application of various atmospheric correction approaches, including OC-SMART, POLYMER, L2gen and ACOLITE, to satellite imagery from the Operational Land Imager (OLI), MultiSpectral Instrument (MSI) and the Ocean and Land Colour Instrument (OLCI). The atmospherically corrected satellite datasets were used to develop and evaluate optimized remote-sensing algorithms for high resolution retrievals of turbidity (i.e., a measure of water clarity), chlorophyll a (Chla) concentrations, and algal blooms in this highly dynamic – and particularly vulnerable to hazards – coastal environment.

*Tong Lin, City University of New York, USA, [email protected], https://orcid.org/0000-0002-8418-7444

Maria Tzortziou, City University of New York, USA, [email protected], https://orcid.org/0000-0002-4510-7827

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