Between 1751 and 2004 surface ocean pH is estimated to have decreased from approximately 8.25 to 8.14. As human-induced emissions of carbon dioxide (CO 2) build up in the atmosphere, excess CO 2 is dissolving into the oceans where it reacts with seawater to form carbonic acid, lowering ocean pH levels (“acidification”) and threatening a number of marine ecosystems. Like global warming, this phenomenon, which is known as ocean acidification, is a direct consequence of increasing levels of carbon dioxide (CO 2) in Earth’s atmosphere. Ocean acidification is a problem that impacts the ocean ecosystem as well as commercial industries like oyster farms. This phenomena has the potential to have profound impacts on living marine resources. Ocean acidification and hypoxia (OAH) is a change in ocean chemistry that is happening right here, right now.And, it is occurring at a faster rate than originally predicted. Comparison with the model outputs show that this climatology could improve pH projection by up to ~0.06 pH units at certain locations of the global ocean, equivalent to a 15 percent acidity difference, or ~3 decades of pH change. Ocean Acidification Background. Ocean acidification. 2013; right), anthropogenic CO 2 emissions are increasing the concentration of carbon dioxide (CO 2) in Earth’s atmosphere, with about 30% (Mikaloff-Fletcher, 2006) of those emissions being taken up by the ocean. As nicely illustrated the recent IPCC Fifth Assessment (Rhein et al. As the pace of ocean acidification accelerates, scientists, resource managers, and policymakers continue to recognize the urgent need to strengthen science as a basis for sound decision making and action. Preliminary evidence suggests ocean acidification will have negative effects on corals, shellfish, and other marine life, with wide-ranging consequences for ecosystems, fisheries, and tourism. The full report identifies 42 actions, including 18 “Key Early Actions,” that will increase Washington’s capacity to understand, reduce, remediate, and where possible adapt to the consequences of ocean acidification. Projected sea-level rise, combined with likely increases in the … Ocean acidification is mentioned in the Intergovernmental Panel on Climate Change (IPCC) Special Report: Global Warming of 1.5°C, released today, 8 October 2018.

Dr Libby Jewett, Director of NOAA’s Ocean Acidification Program and co-chair of the Global Ocean Acidification Observing Network, GOA-ON, (VC16542) made a presentation on GOA-ON status, progress and lessons learned. The NOAA Ocean Acidification Program coordinates research, monitoring, and other activities to improve our understanding of how (and how fast) the chemistry of the ocean is changing, how variable that change is by region, and what impacts these changes are having on marine life, people, and the local, regional, and national economies.

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