Trends in oxygen (O₂) concentrations in the near-bottom layer and number of trends, by concentration group (2000-2023)

The maps show trends in the annual 5-percentile of oxygen concentrations in near-bottom waters at stations with at least 5 years of observations in the period 2000-2023, by three concentration classes: <4mg/l (including <2mg/l class); 4-6mg/l and >6mg/l.
The chart shows the number of time series with increasing trend/no trend/decreasing trend in the North-East Atlantic Ocean and Baltic Sea for grid cells with DO concentrations <4mg/l; 4-6mg/l and >6mg/l, in the near-bottom layer during 2000-2023.