Permeable coral reef sediment dissolution driven by elevated pCO2 and pore water advection, supplement to: Cyronak, Tyler; Santos, Isaac R; Eyre, Bradley D (2013): Permeable coral reef sediment dissolution driven by elevated pCO2 and pore water advection. Geophysical Research Letters, 40(18), 4876–4881

• Main Authors: Cyronak, Tyler, Santos, Isaac R, Eyre, Bradley D
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2013
• Subjects: Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Coast and continental shelf; Entire community; Field experiment; Rocky-shore community; South Pacific; Tropical; Identification; Treatment; Oxygen, flux; Alkalinity, total, flux; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Salinity; Temperature, water; Alkalinity, total; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Calcite saturation state; Potentiometric; Calculated using CO2SYS; Potentiometric titration; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Heron Island; Pacific; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.833970; https://doi.pangaea.de/10.1594/PANGAEA.833970

Ocean acidification (OA) is expected to drive the transition of coral reef ecosystems from net calcium carbonate (CaCO3) precipitating to net dissolving within the next century. Although permeable sediments represent the largest reservoir of CaCO3 in coral reefs, the dissolution of shallow CaCO3 sands under future pCO2 levels has not been measured under natural conditions. In situ, advective chamber incubations under elevated pCO2 (~800 µatm) shifted the sediments from net precipitating to net dissolving. Pore water advection more than doubled dissolution rates (1.10 g CaCO3/m**2/day) when compared to diffusive conditions (0.42 g CaCO3/m**2 /day). Sediment dissolution could reduce net ecosystem calcification rates of the Heron Island lagoon by 8% within the next century, which is equivalent to a 25% reduction in the global average calcification rate of coral lagoons. The dissolution of CaCO3 sediments needs to be taken into account in order to address how OA will impact the net accretion of coral reefs under future predicted increases in CO2. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2014-07-11.