Wednesday, September 16, 2020

Marine animals live where ocean is most breathable, ranges may shrink with climate change

New research shows that a wide variety of marine animals -- from vertebrates to crustaceans to mollusks -- already inhabit the maximum range of breathable ocean that their physiology will allow. The findings provide a warning about climate change: Since warmer waters will harbor less oxygen, some stretches of ocean that are breathable today for a given species may not be in the future.

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Can pumping up cold water from deep within the ocean halt coral bleaching?

Rising ocean temperatures cause marine heat waves, which place stress on living coral animals, as well as the photosynthetic algae on which they depend for energy. A new study is showing potential for the use of artificial upwelling (AU)-- or the application of cooler, deep water -- as a way to mitigate the thermal stress on corals.

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Ancient volcanoes once boosted ocean carbon, but humans are now far outpacing them

A new study of an ancient period that is considered the closest natural analog to the era of modern human carbon emissions has found that massive volcanism sent great waves of carbon into the oceans over thousands of years -- but that nature did not come close to matching what humans are doing today.

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