Keywords
acidification
coral
limestone
pH
How to Cite
Abstract
A widespread alarm is sweeping the world at present about the ill effects of man-made increases in carbon dioxide (CO2 ) production. One aspect is that it may cause the ocean to become acid, and dissolve the carbonate skeletons of many living things including shellfish and corals. However, the oceans are not acid, never have been in geological history, and cannot become acid in the future. Changes in atmospheric CO2 cannot produce an acid ocean. Marine life depends on CO2 , and some plants and animals fix it as limestone. Over geological time enormous amounts of CO2 have been sequestered by living things, and today there is far more CO2 in limestones than in the atmosphere or ocean. Carbon dioxide in seawater does not dissolve coral reefs, but is essential to their survival.
References
Albright R., Caldeira L, Hosfelt J., Kwiatkowski L., Maclaren J.K., Mason B.M., Nebuchina Y., Ninokawa A., Pongratz J., Ricke K.L., Rivlin T., Schneider K., Sesboüé M., Shamberger K., Silverman J., Wolfe K., Zhu K., Caldeira K., 2016. Reversal of ocean acidification enhances net coral reef calcification. Nature: 531: 362–365.
Australian Government’s Great Barrier Reef Marine Park Authority. 2019. Online: www.gbrmpa.gov.au/ourwork/threats-to-the-reef/climate-change/ocean-acidification%20 (accessed Juky 11, 2019).
Berner R.A., Kothavala Z., 2001. A revised model of atmospheric CO2 over Phanerozoic time. American Journal of Science 301: 182–204.
Bourman R.P., Murray-Wallace C.V., Harvey N., 2016. Coastal Landscapes of South Australia. University of Adelaide Press, Adelaide. 420pp. DOI: 10.20851/coast-sa.
Broecker W. 2011. Foreword. In: J.-P. Gasutto, L. Hansson (eds.), Ocean Acidification. Oxford University Press: v–vii.
Caldeira K., Wickett M.E., 2003. Anthropogenic carbon and ocean pH. Nature 425: 365.
Delingpole J. 2014. NOAAgate: how ‘ocean acidification’ could turn out to be the biggest con since Michael Mann’s Hockey Stick. Brietbart, 23 December 2014.
Doogue J., Nova J., 2015. Oceans not acidifying – “scientist” hid 80 years of pH data. Online: joannenova.com. au/2015/01/oceans-not-acidifying-scientists-hid-80- years-of-ph-data/ (accessed July 11, 2019).
Feely R.A., Sabine C.L., Lee K., Berelson W., Kleypas J., Fabry VJ, Millero FJ., 2004. Impact of anthropogenic CO2 on the CaCO3 system in the oceans. Science 305(5682): 362–366.
Gasutto J.-P., Hansson L. (eds.), 2011. Ocean Acidification. Oxford University Press.
Hendriks I.E., Duarte C.M., Alvarez M., 2010. Vulnerability of marine biodiversity to ocean acidification: A meta-analysis. Estuarine, Coastal and Shelf Science 86: 157–164.
Henry W., 1803. Experiments on the quantity of gases absorbed by water, at different temperatures, and under different pressures. Philosophical Transactions of the Royal Society 93: 29–274. DOI: 10.1098/rstl.1803.0004.
Herfort L., Thake B., Taubner I., 2008. Bicarbonate stimulation of calcification and photosynthesis in two hermatypic corals. Journal of Phycology 44: 91–98.
IPCC [Intergovernmental Panel on Climate Change], 2018. Global Warming of 1.5°C.An IPCC Special Report on the impacts of global warming of 1.5°C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty [Masson-Delmotte, V., P. Zhai, H.-O. Pörtner, D. Roberts, J. Skea, P.R. Shukla, A. Pirani, W. Moufouma-Okia, C. Péan, R. Pidcock, S. Connors, J.B.R. Matthews, Y. Chen, X. Zhou, M.I. Gomis, E. Lonnoy, T. Maycock, M. Tignor, and T. Waterfield (eds.)].
Kerrison P., Hall-Spencer J., Suggett D., Hepburn L., Steinke M., .2011. Assessment of pH variability at a coastal CO2 vent for ocean acidification studies. Estuarine and Coastal Marine Science 94: 129–137.
Mcculloch M.T., D’olivo J.P., Falter J., Holcomb M., Trotter J.A., 2017. Coral calcification in a changing world and the interactive dynamics of pH and DIC upregulation. Nature Communications 8: 15866.
NASA [National Aeronautics and Space Administration], 2019. Global Climate Change – Vital Signs of the Planet. Online: climate.nasa.gov/evidence/ (accessed July 11, 2019).
Pardew J., Pimentel M.B., Low-Decarie E., 2018. Predictable ecological response to rising CO2 of a community of marine phytoplankton. Ecology and Evolution 8: 4292–4302.
Segalstad T.V., 2014. Some thoughts on Ocean Chemistry. Nongovernmental International Panel on Climate Change (NIPCC), Reports Climate Change Reconsidered II – Biological impacts.: 817–823.
Starck W., 2010. Observations on Growth of Reef Corals and Sea Grass Around Shallow Water Geothermal Vents in Papua New Guinea. Quadrant Online 15 March 2010.
Wallace M., 2015. Ocean pH Accuracy Arguments Challenged with 80 Years of Instrumental Data. Watts Up With That, March 31, 2015. Online: wattsupwiththat. com/2015/03/31/ocean-ph-accuracy-arguments-challenged-with-80-years-of-instrumental-data/ (accessed July 11, 2019).