Ocean Action Hub

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Atmospheric carbon dioxide (CO2) levels are rising as a result of human activities, such as fossil fuel burning, and are increasing the acidity of seawater. This process is known as ocean acidification. Historically, the ocean has absorbed approximately 30% of all CO2 released into the atmosphere by humans since the start of the industrial revolution, resulting in a 26% increase in the acidity of the ocean (average global decrease in ocean pH of about 0.1 unit).

Ocean acidification make it more difficult for the numerous organisms that fix calcium carbonate in their skeletons and shells to do so, and can also impact metabolic and reproductive processes in many marine species. By impacting marine ecosystems at multiple levels, it has significant potential to affect food security and livelihoods that depend upon healthy marine ecosystems. The economic impact of ocean acidification could be substantial.

Reducing CO2 emissions is the only way to minimize long-term, large-scale risks from ocean acidification (IGBP, IOC, SCOR, 2013, p. 1).

Latest

A 2-year expedition to study biodiversity of coral reefs facing climate change.

Approved

15 May 2017 - A revolution in thinking is needed to protect this vital commons.

Approved
Australia
The social enterprise gives 50% of its profits to the Australian Marine Conservation Society to raise awareness about the dangers facing the Great Barrier Reef.
Approved

1 May 2017 - A hard look at experimental setups may start to explain dueling predictions on whether ocean acidification will boost, or choke, vital marine nitrogen fixers.

Official

28 Apr 2017 - The fate of the world’s marine life today - including the threatened bluefin tuna - is in all our hands

Official
On Africa’s west coast the ocean is hearth and home, but climate changes are resulting in rising sea levels, degraded fish stocks, coastal degradation and more.
Official

26 Apr 2017 - For Sri Lanka, heavily economically dependent on the ocean, UN initiatives relating to the ocean and climate change are of particular importance.

Official

24 Apr 2017 - UNDP OCEAN BLOG SERIES - Local communities are at the forefront of marine resources management.

Official

21 Apr 2017 - As the sky turned to ink on Monday, seven men and women waited with bated breath at a secluded island off Singapore's southern coast to witness a once-a-year spectacle - an o

Official

19 Apr 2017 - As many countries turn inward, it is more important than ever to tackle critical challenges that are beyond the reach of any single state and which compel us to work together.

Official

18 Apr 2017 - A five-day regional training workshop on Coastline Mapping using Satellite Imagery was launched yesterday at the Mauritius Oceanography Institute (MOI) in Albion.

Official

17 Apr 2017 - More people than ever are coming to see the reef and those who make a living showing it off want the world to know it’s still a natural wonder. But they worry about its future, and that of their 64,000-strong industry.

Official