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Environmental information systems
Trends in average summer chlorophyll-a concentrations in Europe's Seas
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Number of stations in brackets
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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.