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Eco-Glossary

Ocean Acidification

 
The oceans have absorbed about 50 percent of the carbon dioxide (CO2) released from the burning of fossil fuels, resulting in chemical reactions that lower ocean pH. This has caused an increase in hydrogen ion (acidity) of about 30 percent since the start of the industrial age through a process known as "ocean acidification."
 
A growing number of studies have demonstrated adverse impacts on marine organisms, including: the decreased rate at which reef-building corals produce their skeletons, the reduced ability of marine algae and free-swimming zooplankton to maintain protective shells and the reduced survival of larval marine species (including commercial fish and shellfish). (Source: NOAA / Photo: Flickr)

Recent Stories


Marine census near completion

Sun, Feb 21 2010 at 8:57 PM EST

One benefit of decade-long project is opportunity to find new medical treatments.


Report: Oceans becoming noisier

Sun, Dec 27 2009 at 12:46 PM EST

Using model simulations, scientists found that increases in acidity could reduce seawater sound absorption by as much as 60 percent by 2100.


Acid oceans: The 'evil twin' of climate change

Fri, Dec 18 2009 at 11:00 AM EST

A lesser-known side effect of climate change, ocean acidification could cause major problems for the entire web of marine life.


Sigourney Weaver's 'Acid Test'

Tue, Dec 01 2009 at 8:46 AM EST

Natural Resources Defense Council's nature documentary/advocacy film aims to prove that the oceans aren't as bulletproof as we think.


Ocean acidification causes fatal attraction among fish

Tue, Nov 24 2009 at 4:43 PM EST

Change in pH leads small fish to become attracted to their predators, removing their ability to ‘smell danger’.


White House panel on oceans visits Great Lakes

Thu, Oct 29 2009 at 11:24 AM EST

Strategy for oceans and coastlines addresses federal response to problems such as pollution, rising sea levels and ocean acidification.


The Arctic turns acidic

Mon, Oct 05 2009 at 2:40 PM EST

North Pole seawater could become corrosive in 10 years, disrupting food chain.


Research finds higher acidity in Alaska waters

Mon, Aug 24 2009 at 3:15 AM EST

Higher levels of carbon dioxide increase the acidity of arctic sea water, threatening marine animals.


Our acidic oceans

Mon, Jul 20 2009 at 10:46 AM EST

As CO2 levels rise, the pH level of the ocean lowers.


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