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Right?Wrong.Far from being uniform everywhere, ocean water is a patchwork of interlinked layers and masses which mix and split apart thanks to currents, eddies, and changes in temperature or salinity.

Using data from historic ship measurements and Argo floats, researchers introduced a machine learning technique that improves assessment and analysis of the ocean's declining oxygen levels.

The corals are found in shallow, warm-water habitats and form the colourful reefs seen in tropical and sub-tropical ocean areas. Built over tens of ... The global assessment of reef-building corals ...