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Ocean Acidification

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Claire Coorough

on 15 April 2010

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Transcript of Ocean Acidification

Ocean Acidification Chemical Reaction Equation CO2 + H2O --> H2CO3 H2CO3 --> H+ + HCO3- Dissociation of Carbonic Acid Whats Ocean Acidification? Ocean acidification is the name given to ongoing decrease in the pH level in oceans on Earth. This caused by their uptake of anthropogenic carbon dioxide from the atmosphere.
How Does Ocean Acidification Happen? The ocean absorbs approximately one-fourth of the CO2 added to the atmosphere from human activities each year, greatly reducing the impact of this greenhouse gas on climate. When CO2 dissolves in seawater, carbonic acid is formed. What are the effects ocean acidification cause in general and on marine organisms? Ocean acidification is decreasing the ability for many marine organisms to build there shells and skeletal structure Field studies suggest that impacts of acidification on some major calcifiers may already be detected Bibliography Dr. Jean-Pierre Gattuso. July 2009. Ocean Acidification Summary. April 12th, 2010, http://www.ocean-acidification.net/ Experiments with important algal species and calcifying oragnisms.
Like corals show significant disturbances when exposed to CO2 levels
which are expected in the present century. Calcium carbonate shells form later and more slowly or not at all. This causes many problems for animals who use shells for protection and survival. Haugan, Peter M. December 2004. Possible Effects of Ocean Acidification. April 13th, 2010. http://www.icriforum.org/secretariat/seycdoc/icri_gm3_item11_7.pdf What is pH level stand for? pH (which is short for potentiometric hydrogen ion concentration) is a measure of the acidity or basicity of a solution.
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