The maps could also be useful resources for deciding where to place instruments to monitor ocean oxygen levels in the future to get the best picture of climate change impacts. (sciencedaily.com)
One problem is that researchers haven't been studying ocean oxygen levels that long, so there isn't an extensive history of data collection to draw on. (scientificamerican.com)
Previous research has also suggested that ocean oxygen levels are going down globally. (scientificamerican.com)