Seawater carbonate chemistry and processes during an experiment with coral reef, 2000 ...

• Main Authors: Langdon, Chris, Takahashi, Taro, Sweeney, Colm, Chipman, D W, Goddard, J G, Marubini, Francesca, Aceves, Heather, Barnett, Heidi, Atkinson, M J
• Format: Dataset
• Language: English
• Published: PANGAEA 2000
• Subjects: Benthos; Calcification/Dissolution; Coast and continental shelf; Entire community; Laboratory experiment; Mesocosm or benthocosm; Not applicable; Rocky-shore community; Tropical; Date/time start; Date/time end; Experimental treatment; Salinity; Temperature, water; Radiation, photosynthetically active; pH; Alkalinity, total; Carbon, inorganic, dissolved; Carbon dioxide; Bicarbonate ion; Carbonate ion; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Calcite saturation state; Calcification rate of calcium carbonate; Ion concentration product; Calcium; Nitrate and Nitrite; Ammonium; Phosphate; Oxygen; Experiment; CTD, Sea-Bird; LICOR quantameter LI-COR LI-192SA; Calculated using seacarb after Nisumaa et al. 2010; Alkalinity, Gran titration Gran, 1950; Coulometric titration; Alkalinity anomaly technique Smith and Key, 1975; Calculated; Titration complexometric; Measured; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.721195; https://doi.pangaea.de/10.1594/PANGAEA.721195

The concentration of CO2 in the atmosphere is projected to reach twice the preindustrial level by the middle of the 21st century. This increase will reduce the concentration of [CO3]2- of the surface ocean by 30% relative to the preindustrial level and will reduce the calcium carbonate saturation state of the surface ocean by an equal percentage. Using the large 2650 m3 coral reef mesocosm at the BIOSPHERE-2 facility near Tucson, Arizona, we investigated the effect of the projected changes in seawater carbonate chemistry on the calcification of coral reef organisms at the community scale. Our experimental design was to obtain a long (3.8 years) time series of the net calcification of the complete system and all relevant physical and chemical variables (temperature, salinity, light, nutrients, Ca2+,pCO2, TCO2, and total alkalinity). Periodic additions of NaHCO3, Na2CO3, and/or CaCl2 were made to change the calcium carbonate saturation state of the water. We found that there were consistent and reproducible ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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). ...