Trends in average summer chlorophyll-a concentrations in Europe's Seas

Baltic Sea: Denmark, Finland, Lithuania, Sweden North Sea: Belgium, Denmark, Netherlands, Norway, Sweden Mediterranean Sea: Greece Results of trend analyses applied to time series for the period 1985-2000 (stations with at least 3 years data in the period 1995-2000 and at least 5 years in total) are shown with a bar chart for each sea region.