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Figure Reference Waterbase - Monitoring stations for rivers and lakes
Water quality monitoring stations in rivers and lakes
Located in Data and maps Maps and graphs
Figure Reference Waterbase - Monitoring stations for rivers and lakes
Water quality monitoring stations in rivers and lakes
Located in Data and maps Maps and graphs
Figure Reference Waterbase - Monitoring stations for rivers and lakes
Water quality monitoring stations in rivers and lakes
Located in Data and maps Maps and graphs
Figure Chlorophyll-a concentrations in European seas in 2010
The map shows Chlorophyll-a concentrations in European coastal and open seas in 2010. The class boundaries “high”, “moderate” and “low” concentration are determined by the 80/20 percentiles of the data set in each sea (sub)region. The low category refers to values within the lowest 20th percentile and the high category refers to values within the upper 20th percentile of concentrations.
Located in Data and maps Maps and graphs
Figure Trend in summer chlorophyll-a concentrations in coastal and open waters of the Baltic, Celtic and Mediterranean Seas and NE Atlantic, 1985-2010
This figure shows stationwise trends in chlorophyll-a concentrations in coastal and open waters of the Baltic, North East Atlantic (Greater North Sea, Celtic Seas, Bay of Biscay), and Mediterranean Sea (Western Mediterranean Sea, Adriatic Sea) (% of stations showing statistically significant change, within the years 1985–2010). Numbers in parentheses indicates number of stations included in the analysis for each country. "Open sea" is the total of all off-shore stations (>20km) within a (sub)region.
Located in Data and maps Maps and graphs
Indicator Assessment Chlorophyll in transitional, coastal and marine waters (CSI 023) - Assessment published Jan 2009
The highest summer chlorophyll-a concentrations were observed in coastal areas and estuaries and are at many locations associated with nutrient inputs from major rivers. Of the 413 stations reported to the EEA in 2005 with more than 5 years of observations, decreasing trends in summer chlorophyll-a concentrations were found at 7% of stations, increasing trends were found at 8% of stations, and the majority of stations (85%) indicate no statistically significant change in concentration. The stations with descreasing trends are located either in the Baltic Sea or along the coast of Italy.
Located in Data and maps Indicators Chlorophyll in transitional, coastal and marine waters
Indicator Assessment Chlorophyll in transitional, coastal and marine waters (CSI 023) - Assessment published Jul 2011
In 2008, the highest summer chlorophyll-a concentrations were observed in coastal areas and estuaries where nutrient concentrations are high, namely in the Gulf of Riga, the Gulf of Finland and along the coast of France and Belgium. Although nutrient concentrations in some European sea areas decreased from 1985 to 2008 (see Core Set Indicator 21), these changes were not clearly reflected in chlorophyll-a concentrations: of the 546 stations reported to the EEA the majority of the stations (89%) indicated no statistically significant change. Changes were detected mainly in Finnish, Dutch, Norwegian, Swedish and Italian coastal waters. At the Finnish and Swedish monitoring stations chlorophyll-a concentrations showed both decreasing and increasing trends, whereas in Italy, Netherlands and Norway concentrations were mainly decreasing. An analysis of changes based on satellite imagery show significantly increasing trends of ocean colour (equivalent to chl-a)along the Mediterranean coast, whereas trends are significantly decreasing in large parts of the central Mediterranean and Black Seas. It also shows significantly increasing trends in the Baltic Sea, but here the analysis is less certain.  
Located in Data and maps Indicators Chlorophyll in transitional, coastal and marine waters
Figure Chlorophyll-a concentrations in European seas, 2008
Chlorophyll-a concentrations in European seas in 2008 based on observations
Located in Data and maps Maps and graphs
Daviz Visualization Trends in chlorophyll-a concentrations in European seas
Located in Data and maps Data visualisation
Figure Chlorophyll-a concentrations in European seas
The map shows summer chlorophyll-a concentrations observed in 2012 in European coastal and open seas. The class boundaries “high”, “moderate” and “low” concentration are determined by the 80/20 percentiles of the data set for the years 2007-2012 in each regional sea.
Located in Data and maps Maps and graphs
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100