Evaluation of water-quality in the Gulf of Finland by NOAA/AVHRR image data

A multi-temporal study of chlorophyll-a concentration and temperature variation has been made by means of three sequential NOAA/AVHRR image data in the Gulf of Finland. The relationship between these parameters and satellite data was set up from sea-truth measurements and concurrent satellite data obtained on 25, 26 and 27 June 1991. This relation has been applied to images by applying channel calibration procedures. At the end of this study, color-coded maps of chlorophyll-a concentration and temperature variation have also been given. -Author