Indicator Fact Sheet

Frequency of low bottom oxygen concentrations in coastal and marine waters

Indicator Fact Sheet

Prod-ID: IND-14-en

Also known as: WEU 015

This is an old version, kept for reference only.

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Topics: Water and marine environment

This page was archived on 03 Mar 2015 with reason: Other (New version data-and-maps/indicators/nutrients-in-transitional-coastal-and-3/assessment was published)

Assessment made on 01 May 2004

Generic metadata

Classification

Topics:

Water and marine environment

DPSIR: Impact

Identification

Indicator codes

WEU 015

Contents

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

Figures

Trends in the frequency of low oxygen concentrations in bottom waters of the Baltic Sea, the Mediterranean and the North Sea.

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.