Chlorophyll-a in transitional, coastal and marine waters

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Topics: Coasts and seas ,

Assessment made on 01 Aug 2003

Note: new version is available!

Mar 26, 2013 - Chlorophyll in transitional, coastal and marine waters (CSI 023) - Assessment published Mar 2013
Jul 06, 2011 - Chlorophyll in transitional, coastal and marine waters (CSI 023) - Assessment published Jul 2011
Jan 29, 2009 - Chlorophyll in transitional, coastal and marine waters (CSI 023) - Assessment published Jan 2009
Nov 29, 2005 - Chlorophyll in transitional, coastal and marine waters (CSI 023) - Assessment published Nov 2005
Jul 27, 2004 - Classification of coastal waters
Jul 27, 2004 - Chlorophyll-a concentrations in transitional, coastal and marine waters
Jul 27, 2004 - Phytoplankton algae in transitional and coastal waters
Jan 06, 2004 - Classification of coastal waters

Generic metadata

Classification

Coasts and seas (Primary theme)

DPSIR: Driving force

Identification

Indicator codes

WEU 013

Geographical coverage:

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Contents

Policy issue: Effects of nutrient load reductions on coastal concentrations of phytoplankton

Key messages

Generally, no trend is observed in summer surface chlorophyll-a concentrations in the Baltic Sea, Greater North Sea or Greek coastal waters.

Figures

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

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 locations show no trend. A few locations in Danish estuaries and the Danish North Sea show a decreasing trend, whilst a few locations 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 and Bäck, 2001; Hänninen et al., 2000).