Chlorophyll-a concentrations in transitional, coastal and marine waters
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Assessment made on 01 May 2004
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Classification
Topics:DPSIR: State
Identification
- WEU 013
Policy issue: Is the condition regarding eutrophication of Europe's seas improving?
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Key assessment
No general trend is observed in summer surface chlorophyll-a concentrations either in the Baltic Sea area, Greater North Sea or coastal waters of Greece. The majority of stations show no trend. A few stations in Danish estuaries and Danish North Sea show a decreasing trend, whilst a few stations in Belgian, Finnish, Lithuanian and Swedish coastal waters show an increasing trend. No trend is observed in the Dutch coastal waters which receive high nutrient inputs from the Rhine river basin, nor in Norwegian and Greek coastal waters. Finland reports that the increasing trend of chlorophyll-a in the eastern Gulf of Finland and in the Archipelago Sea is due to increase in phosphorus released from hypoxic/anoxic sediments (Kauppila & Bäck, 2001; Hänninen et al. 2000). Due to the information available for this indicator the efforts in the reduction of nutrient loads didn't face success yet.
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For references, please go to https://www.eea.europa.eu/data-and-maps/indicators/chlorophyll-a-concentrations-in-transitional or scan the QR code.
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