Percentage of stations in each marine (sub)region with significant negative, positive or no trends in summer/autumn oxygen concentrations in the water column near the sea floor, 1990-2017

Note:
The chart shows the percentages of stations with a significant positive trend (green), no significant trend (grey) or a significant negative trend (purple) by sub-region. The number of stations in each analysis is shown in brackets after the sub-region name.
* Negative trend = towards lower concentrations
* Positive trend = towards higher concentrations