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The oceans are losing oxygen

10.12.2019

The International Union for the Conservation of Nature and Natural Resources (IUCN) has published a report according to which the level of oxygen in the world's oceans is declining at an unprecedented rate. Climate change is dangerously exacerbating the situation.

The new study involved 67 scientists from 17 countries. It turned out that since 1950, the level of oxygen in the oceans has decreased by 2%, and the volume of water completely deprived of oxygen has quadrupled since the 1960s.

60 years ago, only 45 regions of the ocean suffered from low oxygen concentrations, in 2011 their number reached 700. According to research, about 50% of oxygen loss in the upper layers of the ocean is caused by global warming.

According to scientists, if the current state of affairs is maintained, an increase in global temperature and an increase in nutrient consumption will lead to the fact that by 2100 the level of oxygen in the ocean will decrease by 3-4%. As a result, giant dead zones will grow, where, under conditions of severe hypoxia, able to survive marine organisms.

The researchers note that deoxygenation threatens large species, including tuna, marlin, swordfish and sharks. Their decline could affect the lives of hundreds of millions of people dependent on fisheries.

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