The International Alliance to Combat Ocean Acidification (OA Alliance) has a rich history of attending UN Ocean Conferences, going back to the first ever conference in 2017 in New York, just a year after the alliance was launched.

Eight years later, we returned to the Third UNOC 2025 in Nice with a bigger coalition and increased ambition — because the stakes to mitigate climate change and combat ocean acidification have never been higher.

Marking a significant milestone in Indigenous-led environmental stewardship, the Makah Tribe of Neah Bay, Washington, today announced the launch of their Ocean Acidification Action Plan during the 2025 UN Ocean Conference. The announcement was made during the side event “Policy Action to Implement SDG 14.3”, hosted by the International Alliance to Combat Ocean Acidification (OA Alliance) in celebration of the political momentum surrounding action on ocean acidification.

‘Carbon in the Current: Contrasting Futures for Our Changing Ocean’ transforms complex science into an immersive experience of ocean climate change.

International Alliance to Combat Ocean Acidification welcomes Zero Emissions Ship Technology Association (ZESTAs) as a new affiliate member, joining a team of partners working to increase ambition for climate action and transform response to climate-ocean change.

Economist Impact, with the support of official host The Nippon Foundation, is hosting the 12th World Ocean Summit in Tokyo in 2025. This year will include a focus on ocean acidification, calling on government and private sector action on ocean acidification. 

The OA Alliance submission to the EU Ocean’s Pact calls on the European Commission to account for climate change and ocean change across its core pillars.