Preindustrial to Modern Interdecadal Variability in Coral Reef pH

  title={Preindustrial to Modern Interdecadal Variability in Coral Reef pH},
  author={Carles Pelejero and Eva Calvo and Malcolm T. McCulloch and John F. Marshall and Michael K. Gagan and Janice M. Lough and B. Opdyke},
  pages={2204 - 2207}
The oceans are becoming more acidic due to absorption of anthropogenic carbon dioxide from the atmosphere. The impact of ocean acidification on marine ecosystems is unclear, but it will likely depend on species adaptability and the rate of change of seawater pH relative to its natural variability. To constrain the natural variability in reef-water pH, we measured boron isotopic compositions in a ∼300-year-old massive Porites coral from the southwestern Pacific. Large variations in pH are found… 
Evidence for ocean acidification in the Great Barrier Reef of Australia
Response to Comment on "Preindustrial to Modern Interdecadal Variability in Coral Reef pH"
It is argued that boron isotopic variations in corals provide a robust proxy for paleo-pH which, together with the likely concomitant changes in the reconstructed partial pressure of CO2 (PCO2) calculated by Matear and McNeil, fall within ranges that are typical of modern coral reef ecosystems.
Shifts in coral reef biogeochemistry and resulting acidification linked to offshore productivity
Evidence is shown that variations in reef biogeochemical processes drive interannual changes in seawater pH and Ωaragonite that are partly controlled by offshore processes that may be linked to offshore productivity and ultimately controlled by larger-scale climatic and oceanographic processes.
Ocean circulation and biogeochemistry moderate interannual and decadal surface water pH changes in the Sargasso Sea
The oceans absorb anthropogenic CO2 from the atmosphere, lowering surface ocean pH, a concern for calcifying marine organisms. The impact of ocean acidification is challenging to predict as each
Coral calcification response to ocean warming and acidification in the southern Great Barrier Reef
  • J. Kang
  • Environmental Science, Geography
  • 2013
The current unprecedented rate of increase in atmospheric greenhouse gases levels is resulting in rapid warming and acidification of the surface ocean. The effect that these changes have had and will
Century-scale trends and seasonality in pH and temperature for shallow zones of the Bering Sea
This study provides the first reconstruction of seasonal cycle and long-term trend in pH for a high-latitude ocean obtained from 2D images of stable boron isotopes from a coralline alga that grew continuously through the 20th century.
Millennial‐scale ocean acidification and late Quaternary decline of cryptic bacterial crusts in tropical reefs
Evidence is presented that acidification has already significantly reduced the formation of calcified bacterial crusts in tropical reefs, providing a long-term context for assessing anticipated anthropogenic effects and directing attention to the role of reef formation and the ability of bioinduced calcification to reflect changes in seawater chemistry.
Historical Trends in pH and Carbonate Biogeochemistry on the Belize Mesoamerican Barrier Reef System
Coral reefs are important ecosystems that are increasingly negatively impacted by human activities. Understanding which anthropogenic stressors play the most significant role in their decline is
Decadal variability in seawater pH in the West Pacific: Evidence from coral δ11B records
Long-term seawater pH records are essential for evaluating the rates of ocean acidification (OA) driven by anthropogenic emissions. Widespread, natural decadal variability in seawater pH superimposes


Evidence for preindustrial variations in the marine surface water carbonate system from coralline sponges
Coralline sponge skeletons are excellent tools for reconstructing the carbon isotope history of dissolved inorganic carbon (DIC) in tropical surface waters. Carbon isotope records from coralline
Oceanography: Anthropogenic carbon and ocean pH
It is found that oceanic absorption of CO2 from fossil fuels may result in larger pH changes over the next several centuries than any inferred from the geological record of the past 300 million years.
Evidence for a higher pH in the glacial ocean from boron isotopes in foraminifera
RECORDS of past changes in the pH of the oceans should provide insights into how the carbonate chemistry of the oceans has changed over time. The latter is related to changes in the atmospheric CO2
Climate-driven changes to the atmospheric CO2 sink in the subtropical North Pacific Ocean
It is shown that a significant decrease in the strength of the carbon dioxide sink over the period 1989–2001 can be attributed to an increase in the partial pressure of surface ocean carbon dioxide caused by excess evaporation and the accompanying concentration of solutes in the water mass.
A 23,000-Year Record of Surface Water pH and PCO2 in the Western Equatorial Pacific Ocean
Bron isotope studies of planktonic foraminifera from the western equatorial Pacific show that this area was a strong source of CO2 to the atmosphere between approximately 13,800 and 15,600 years ago, and increased upwelling in the eastern equatorialPacific may have played an important role in the rise in atmospheric CO2 during the last deglaciation.
Rapid Acidification of the Ocean During the Paleocene-Eocene Thermal Maximum
Geochemical data from five new South Atlantic deep-sea sections indicate that a large mass of carbon dissolved in the ocean at the Paleocene-Eocene boundary and that permanent sequestration of this carbon occurred through silicate weathering feedback.
Geochemical consequences of increased atmospheric carbon dioxide on coral reefs
A coral reef represents the net accumulation of calcium carbonate (CaCO3) produced by corals and other calcifying organisms. If calcification declines, then reef-building capacity also declines.
Impact of Anthropogenic CO2 on the CaCO3 System in the Oceans
The in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data are estimated, and the future impacts of anthropogenic CO2 on Ca CO3 shell–forming species are discussed.
Reduced calcification of marine plankton in response to increased atmospheric CO2
It is suggested that the progressive increase in atmospheric CO2 concentrations may slow down the production of calcium carbonate in the surface ocean, as the process of calcification releases CO2 to the atmosphere.