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ocean acidification

Three divers attach a grid of rock samples to a cliff underwater.
Posted inNews

Acidifying Seas Are Wearing Away at Underwater Archaeology

by Syris Valentine 9 March 20269 March 2026

Marble, limestone, and other carbonate rocks used throughout antiquity could start dissolving as oceans soak up more carbon dioxide.

A healthy section of reef that exhibits branching and nonbranching corals of many sizes and colors. Many fish swim near the reef.
Posted inNews

Coral Diversity Drops as Ocean Acidifies

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 2 February 20262 February 2026

As seawater becomes steadily more acidic, complex branching corals die off and are replaced with hard boulder corals and algae.

A wave crashes onto a dark, rocky shore. Green rolling hills are in the distance.
Posted inResearch Spotlights

Our Ocean’s “Natural Antacids” Act Faster Than We Thought

Sarah Stanley, Science Writer by Sarah Stanley 30 January 202630 January 2026

New evidence from New Zealand suggests that calcium carbonate dissolution occurs not just over millennial timescales, but over annual and decadal ones too.

Underwater photo of pink coral.
Posted inEditors' Highlights

Coastal Coralline Algae Naturally Survive Persistent, Extreme Low pH

by Xiaojuan Feng 22 January 202622 January 2026

Time-series monitoring shows that a coastal coralline algae reef is naturally exposed to extreme low pH levels, suggesting potential adaptation of this biodiverse habitat to future ocean acidification.

A satellite view of a portion of Earth shows the planet’s curved horizon at the top of the image. Green and brown landmasses are cut by two large, blue, winding rivers that empty into the ocean in the foreground. Clouds are visible on the edges of the image.
Posted inResearch Spotlights

New River Chemistry Insights May Boost Coastal Ocean Modeling

Sarah Stanley, Science Writer by Sarah Stanley 9 January 20269 January 2026

By more realistically accounting for river inputs, researchers reduced overestimation of the amount of carbon dioxide absorbed by coastal waters.

An underwater reef.
Posted inNews

As Seas Rise, Corals Can’t Keep Up

by Grace van Deelen 14 October 20251 January 2026

Coral reef growth rates in the tropical western Atlantic have slowed to a fraction of what they once were, erasing coastal protection benefits they once offered.

A person stands among crates of shellfish on a dock on a river.
Posted inNews

Warming Gulf of Maine Buffers Ocean Acidification—For Now

by Kimberly Hatfield 3 July 20253 July 2025

Scientists constructed a 100-year history of acidity in the Gulf of Maine. They expected coastal variability but were surprised by what they didn’t find: a strong anthropogenic signal.

Chesapeake Bay, with its tree-lined waterfronts curving along the river toward the ocean, is pictured from above.
Posted inResearch Spotlights

River Alkalinization and Ocean Acidification Face Off in Coastal Waters

by Madeline Reinsel 21 May 202521 May 2025

Factors ranging from rainfall to nutrient runoff to changing mining and agricultural practices drove decades-long pH trends in the Chesapeake Bay.

White bubbles in water next to corals
Posted inNews

Corals Are Simplistic When Conditions Are Acidic

by Anupama Chandrasekaran 16 August 202416 August 2024

Increasing ocean acidity could spell trouble for fish that depend on corals’ many branches for protection.

Viewed from below, three sharks swim beneath a dense school of smaller fish in the ocean, all in shades of blue.
Posted inResearch Spotlights

In Hot Water and Beyond: Marine Extremes Escalate

Sarah Stanley, Science Writer by Sarah Stanley 28 June 202428 June 2024

A new study suggests marine life is increasingly faced with triple-threat events in which extreme water temperature, low oxygen levels, and acidification converge.

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

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Research Spotlights

Global Observations Reveal Rapid Reorganization of Ocean Nutrients

12 March 202612 March 2026
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Robustness Through Diversity: Learning from Heterogeneous Aquifers

12 March 202612 March 2026
Editors' Vox

Introducing the New EIC of Paleoceanography and Paleoclimatology

12 March 202612 March 2026
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