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Sound and independent information
on the environment

You are here: Home / Data and maps / Indicators / Frequency of low bottom oxygen concentrations in coastal and marine waters

Frequency of low bottom oxygen concentrations in coastal and marine waters

Topics: , ,

Assessment made on  01 May 2004

Generic metadata

Classification

Water Water (Primary theme)

Coasts and seas Coasts and seas

DPSIR: Impact

Identification

Indicator codes
  • WEU 015
Geographical coverage:

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Contents
 

Policy issue:  Is the condition regarding eutrophication of Europe's seas improving?

Key messages

  • Generally no trend is observed in the frequency of low oxygen concentrations (hypoxia) in the Baltic Sea, the North Sea and the Mediterranean Sea.

Figures

Key assessment

Generally no trend is observed in the frequency of hypoxia in the North Sea or the Mediterranean Sea during the period 1985-2002. Significant trends are observed at a few stations in the Baltic Sea although with no specific pattern. The most drastic change in the frequency of hypoxia in Danish waters occurred from the 1970s to the 1980s (Ærtebjerg et al. 2002). Many stations had too few data to provide sufficient power in the trend analysis.

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