The Effects of Increased Atmospheric CO2

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Deforestation and the burning of fossil fuels have led to a great increase in anthropogenic carbon dioxide released into the atmosphere. Since the Industrial Revolution, the concentration of atmospheric CO2 has increased from about 280 parts per million to above 390 parts per million; and recently has been calculated to be rising 1.5-2 parts per million per year (Kudela, 2013). This sharp increase in atmospheric CO2 has had an impact on the ocean, and can be seen by the increase in the levels of gaseous CO2 in the seawater. When the CO2 rich atmosphere comes in contact with the surface of the ocean, CO2 is readily absorbed which causes the pH of seawater to become more acidic. Many enzymes and processes that occur in the ocean, like test building, are pH sensitive (Calderia, 2003). Any change in the pH would result in the breakdown of important functions to which the outcome is uncertain. Many marine organisms, such as corals, algae, and pretty much anything with a shell, rely on CaCO3 to form their hard parts. An increase in ocean acidity causes this CaCO3 to rapidly dissolve, and makes it generally harder for these organisms to build their calcifying parts (Kleypas, 1999). If we maintain this current rate of CO2 increase, the pH of the ocean is expected to decrease by 0.5 by 2100 (Kudela, 2013). Although there are still those who refuse to believe that the rising levels of CO2 have an adverse effect on the environment, one cannot argue that there isn’t evidence for ocean acidification. If we don’t get on the same page now, there may be a day when you go on vacation to Hawaii and there are no longer and beautiful corals or their fishes to see while snorkeling. When it comes to ocean acidification, the media typicall... ... middle of paper ... ...Newsom, L. A. (2013). The impact of ocean acidification on the functional morphology of Foraminifera. PLoS ONE, 8(12), 1-4. Kleypas, J. A. (1999). Geochemical Consequences of Increased Atmospheric Carbon Dioxide on Coral Reefs. Science, 284(5411), 118-120. Kudela, R., & Sverdrup, K. (2013). The Chemistry of Seawater. Ocean Sciences (pp. 141-144). USA: McGraw-Hill Education. Le Quesne, W. J., & Pinnegar, J. K. (2012). The potential impacts of ocean acidification: scaling from physiology to fisheries. Fish & Fisheries, 13(3), 333-344. Nienhuis, S.; Palmer, A.; Harley, C. (2010). "Elevated CO2 affects shell dissolution rate but not calcification rate in a marine snail". Proceedings of the Royal Society B 277 (1693): 2553–2558. Roleda, M. Y., Boyd, P. W., & Hurd, C. L. (2012). Before ocean acidification: calcifier chemistry lesson. Journal of Phycology, 48(4), 840-843.

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