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Ocean Acidification Summary for Policymakers (2013)

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The Ocean Acidification Summary for Policymakers was published in 2013. It summarises key findings from the Ocean in a High CO2 World Symposium, which is sponsored by the International Geosphere-Biosphere Programme, the Intergovernmental Oceanographic Commission of UNESCO and the Scientific Committee on Oceanic Research.

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Summary for Policymakers

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Ocean Acidification Summary for Policymakers (2013)

  1. 1. Ocean Acidification Summary for Policymakers 2013 International Geosphere-Biosphere Programme Intergovernmental Oceanographic Commission of UNESCO Scientific Committee on Oceanic Research Wendy Broadgate, IGBP Deputy Director (2014)
  2. 2. • 26 % increase in acidity due to CO2 emissions • Many organisms show adverse effects (corals, molluscs) • Some thrive (e.g. seagrasses) • Ecosystems will change in the future • There will be socio-economic impacts and need for adaptation • Reducing CO2 emissions will reduce impacts
  3. 3. pH 1850
  4. 4. pH 2100
  5. 5. Aragonite saturation 1850
  6. 6. Aragonite saturation 2100
  7. 7. Commercially important organisms
  8. 8. After Peters et al., 2013 Observed CO2 emissions and emissions scenarios to 2100
  9. 9. Confidence levels (IPCC)
  10. 10. iStockhphoto.com/ermingut
  11. 11. Atmospheric CO2 and ocean pH
  12. 12. After Bopp et al., 2013 3.2°–5.4°C Global temperature increase likely by 2100: 0.9°–2.3°C Ocean surface pH projections to 2100
  13. 13. Turley et al., 2006 Rapid ocean acidification
  14. 14. Jason Hall-Spencer Winners and losers
  15. 15. Hot, sour and breathless
  16. 16. Molluscs iStockphoto.com/Eduardo Luzzatti
  17. 17. Coral Reefs iStockphoto.com/t.light
  18. 18. Changes in marine ecosystems iStockphoto.com/Richard Carey
  19. 19. Calcifying organisms Ulf Riebesell; GEOMAR
  20. 20. Marine snails Steve Ringman
  21. 21. Fish behaviour
  22. 22. Nitrogen fixation stimulated NASA's Goddard Space Flight Center/USGS)
  23. 23. Economic losses iStockphoto.com/Thomas Bradford
  24. 24. Economic losses
  25. 25. Fisheries
  26. 26. Biogeochemical cycles
  27. 27. www.ocean-acidification.net
  28. 28. IGBP, IOC, SCOR (2013). Ocean Acidification Summary for Policymakers – Third Symposium on the Ocean in a High-CO2 World. International Geosphere-Biosphere Programme, Stockholm, Sweden. Authors Wendy Broadgate, IGBP Ulf Riebesell, Germany Claire Armstrong, Norway Peter Brewer, USA Ken Denman, Canada Richard Feely, USA Kunshan Gao, China Jean-Pierre Gattuso, France Kirsten Isensee, IOC-UNESCO Joan Kleypas, USA Dan Laffoley, UK James Orr, France Hans-Otto Pörtner, Germany Carlos Eduardo de Rezende, Brazil Daniela Schmidt, UK Ed Urban, SCOR Anya Waite, Australia Luis Valdés, IOC-UNESCO Wendy Broadgate, IGBP Deputy Director (2014) wendy@igbp.kva.se www.ocean-acidification.net