Ocean Deoxygenation: Global map

January 4, 2018

Map showing distribution of low oxygen zones — Download map_globallowoxygen.jpg

Low-oxygen zones are spreading around the globe. Red dots mark places on the coast where oxygen has plummeted to 2 milligrams per liter or less, and blue areas mark zones with the same low-oxygen levels in the open ocean. (Credit: GO₂NE working group. Data from World Ocean Atlas 2013 and provided by R. J. Diaz)

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The Ocean Is Losing Its Breath. Here’s the Global Scope.

In the past 50 years, the amount of water in the open ocean with zero oxygen has gone up more than fourfold. In coastal water bodies, including estuaries and seas, low-oxygen sites have increased more than 10-fold since 1950. Scientists expect oxygen to continue dropping even outside these zones as Earth warms.
- January 4, 2018
- News Release
- Environmental Research Center

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