Seawater carbonate chemistry and benthic foraminifera Ammonia sp. uranium incorporation during experiments, 2013 ...

• Main Authors: Keul, Nina, Langer, Gerald, de Nooijer, Lennart Jan, Nehrke, Gernot, Reichart, Gert-Jan, Bijma, Jelle
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Ammonia sp.; Benthos; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Coast and continental shelf; Foraminifera; Heterotrophic prokaryotes; Laboratory experiment; North Atlantic; Single species; Temperate; Experimental treatment; Salinity; Temperature, water; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbonate ion; Bicarbonate ion; Carbon, inorganic, dissolved; Alkalinity, total; pH; Calcite saturation state; Uranium/Calcium ratio; Coefficient; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Biological sample; Conductivity and pH meter, pH/Cond 340i WTW, Weilheim; Calculated using CO2SYS; Photometrically using autoanalyzer QUAATRO; Calculated, see references; Calculated using seacarb after Nisumaa et al. 2010; Biological Impacts of Ocean Acidification BIOACID; European Project on Ocean Acidification EPOCA; Mediterranean Sea Acidification in a Changing Climate MedSeA; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.821210; https://doi.pangaea.de/10.1594/PANGAEA.821210

The chemical and isotopic composition of foraminiferal shells (so-called proxies) reflects the physico-chemical properties of the seawater. In current day paleoclimate research, the reconstruction of past seawater carbonate system to infer atmospheric CO2 concentrations is one of the most pressing challenges and a variety of proxies have been investigated, such as foraminiferal U/Ca. Since in natural seawater and traditional CO2 perturbation experiments, the carbonate system parameters co-vary, it is not possible to determine the parameter of the carbonate system causing e.g. changes in U/Ca, complicating the use of the latter as a carbonate system proxy. We overcome this problem, by culturing the benthic foraminifer Ammonia sp. at a range of carbonate chemistry manipulation treatments. Shell U/Ca values were determined to test sensitivity of U incorporation to various parameters of the carbonate system. We argue that CO3 is the parameter affecting the U/Ca ratio and consequently, the partitioning ... : 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). ...