Right now, the pH of open waters near Hawaii commonly hovers around 8, and ocean acidification models forecast a pH drop of 0.2 or more over the next 100 years, said Carrington.

In deeper layers of the ocean, the findings are even more severe. At depths of 200 meters, 60% of the ocean had surpassed the acidification threshold.

Acidification makes it more difficult for marine animals to produce skeletons and shells, and puts the essential ocean habitat, coral reefs, at risk of eroding faster than they can be rebuilt.

If a change in ocean pH of 0.25 over a few hundred to a few thousand years following the Chicxulub impact caused such a dramatic die-off of marine life, the projected ocean acidification we could ...

Eye on the Arctic brings you stories and newsmakers from around the North. If left unchecked, acidification levels in the Arctic Ocean will have significant consequences for northern communities ...

“Ocean acidification is happening globally,” said Jim Christian, research scientist with Fisheries and Oceans Canada. “It affects all kinds of organisms,” said Christian, who works at the ...

Ocean acidification is affecting the shells and sensory organs of young Dungeness crabs in West Coast waters, posing a threat to B.C.’s second most valuable seafood export. A study published in ...

The new study found four of the world’s seven ocean basins have crossed the planetary boundary for ocean acidification. Polar regions have been most widely affected: Nearly 87 per cent of the Southern ...

More information: Helen S. Findlay et al, Ocean Acidification: Another Planetary Boundary Crossed, Global Change Biology (2025). DOI: 10.1111/gcb.70238 Journal information: Global Change Biology ...

Researchers propose redefining the ocean acidification boundary to a 10% decline from the pre-industrial saturation state to better protect marine biodiversity. 'Stick to the Paris Agreement targets' ...

If left unchecked, acidification levels in the Arctic Ocean will have significant consequences for northern communities as well as the rest of the globe says a report released this week. The ...