The integration of remotely sensed, seatruth and modelled data in the investigation of mesoscale features in the Baltic coastal phytoplankton field

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Abstract. Specific features observed in the Baltic coastal phytoplankton field are investigated in this work. The features are initially described by the means of Coastal Zone Color Scanner (CZCS) level-3 imagery processed within the Ocean Colour European Archive Network (OCEAN) Project and indexed for the Baltic region. The observations made are further supported by other remotely sensed data, namely Advanced Very High Resolution Radiometer (AVHRR) data where channel 1 is used as an indicator of turbidity and channel 4 is used as an indicator of thermal structure. Furthermore, to describe the three-dimensional ecosystem structure of the features, modelling and a database of in situ hydrological, hydrooptical and acoustical observations are included in the investigation. A full dynamic ecosystem description can be achieved from remotely sensed and sea truth data assimilation by integrating them with a coupled ecodynamics-hydrodynamics model. Here a simple three-component phytoplankton-zooplanktonnutrients population dynamics model with a high resolution bio-optical block is coupled with the model of vertical mixing and a model of wind-driven currents. The model is used for experiments with CZCS and seatruth chlorophyll data assimilation. The resulting models of the effects of mesoscale features (a local upwelling and a river front) on local ecodynamics were constructed along sections of the study area.

Document Type: Research Article


Publication date: May 15, 1999

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