Figure

Trends in oxygen concentrations in the near-bottom layer and number of trends, by concentration group (1989-2019)

Figure Created 04 Aug 2022 Published 05 Aug 2022 Last modified 28 Mar 2023

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Topics: Water and marine environment

The maps show trends in annual 25-percentile of oxygen concentrations in near-bottom waters at stations with at least 6 years of observations in the period 1989-2019, by three classes of DO concentrations: <4mg/l (including <2mg/l class); 4-6mg/l and >6mg/l. Only trends for time series ending after 2000 are included. The chart shows the number of time series with increasing, decreasing and no trend in the North-East Atlantic Ocean and Baltic Sea for the three classes of DO concentrations during the same period (1989-2019).

https://www.eea.europa.eu/data-and-maps/figures/trends-in-oxygen-concentrations-in/fig02-129857-mar012-v4.eps/image_large

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Metadata

Methodology:: Data retrieved from ICES oceanographic database and from EMODnet Chemistry.
Units:: Oxygen in mg/l
Rights:: Copyrights of the datasets: please take a look at https://www.ices.dk/data/guidelines-and-policy/Pages/ICES-data-policy.aspx and https://www.emodnet-chemistry.eu/data/acknowledgement

Copyrights of the figure: EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged (https://www.eea.europa.eu/legal/copyright).
Copyright holder: European Environment Agency (EEA).
Owners:: European Environment Agency (EEA)
Processors:: Deltares
Figure type:: Map

Additional information

• The number of trends in the Mediterranean Sea and Black Sea are not shown as the number of time series is too low.
• Results reflect data availability, which may vary considerably across regions and over time.

Geographical coverage
Marine Strategy Framework Directive (MSFD) Marine regions: North-East Atlantic Ocean, Baltic Sea, Mediterranean Sea and Black Sea.