Ocean Acidification

The ocean chemistry of the seawater is rapidly changing in a process known as ocean acidification.  These changes in seawater chemistry affect animal growth, survival and behavior, and they are depleting the ocean of calcium carbonate, a nutrient vital for shellfish to build shells.  Marine organisms with calcium carbonate shells or skeletons – such as corals, oysters, clams, and mussels – can be affected by small changes in acidity.  That's important, because shelled organisms are essential throughout the marine food chain.  They are also vital to our economy, as shellfish hatcheries on the brink of collapse just a few years ago, struggle to adapt.

For more information about ocean acidification, please visit NOAA’s Ocean Acidification Program (OAP).

IOOS’ Ocean Technology Transition program, in collaboration with NOAA OAP, has supported the projects to improve ocean acidification observations and research:

FY24

An in situ system for combined pH and alkalinity measurements

Assessing the emerging threat of sargassum inundation on coastal carbonate chemistry in the U.S. Caribbean by streamlining and operationalizing observing technologies

FY20

Technology Transfer of a Surface pCO2 Flux Instrument for Autonomous Platform Applications

FY15

Tracking Ocean Alkalinity using New Carbon Measurement Technologies (TAACT)

FY14

Turning the Headlights On High: Improving an Ocean Acidification Observation System in Support of Pacific Coast Shellfish Growers

FY13

Pacific Ocean Acidification Project

For more information about IOOS’ Ocean Technology Transition program, please contact Tiffany Vance, Program Manager.