Description: 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 coefficient for U in Ammonia sp DU. We can confirm the strong potential of foraminiferal U/Ca as a CO3 proxy.
Global identifier:
Doi(
"10.1594/PANGAEA.821210",
)
Measurements {
domain: Unspecified,
station: None,
measured_variables: [
"Experimental treatment",
"Salinity",
"Temperature, water",
"Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)",
"Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)",
"Carbonate ion",
"Bicarbonate ion",
"Carbon, inorganic, dissolved",
"Alkalinity, total",
"pH, total scale",
"Calcite saturation state",
"Uranium/Calcium ratio",
"Uranium/Calcium ratio",
"Coefficient",
"Carbonate system computation flag",
"Carbon dioxide",
"Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)",
"Fugacity of carbon dioxide (water) at sea surface temperature (wet air)",
"Bicarbonate ion",
"Carbonate ion",
"Alkalinity, total",
"Aragonite saturation state",
"Calcite saturation state",
],
methods: [
"Conductivity and pH meter, pH/Cond 340i (WTW, Weilheim)",
"Conductivity and pH meter, pH/Cond 340i (WTW, Weilheim)",
"Calculated using CO2SYS",
"Calculated using CO2SYS",
"Calculated using CO2SYS",
"Calculated using CO2SYS",
"Photometrically using autoanalyzer QUAATRO",
"Calculated using CO2SYS",
"Conductivity and pH meter, pH/Cond 340i (WTW, Weilheim)",
"Calculated using CO2SYS",
"Calculated, see reference(s)",
"Calculated, see reference(s)",
"Calculated, see reference(s)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
"Calculated using seacarb after Nisumaa et al. (2010)",
],
}
Dataset
Comment: 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).
Origins: /Wissenschaft/PANGAEA
Tags: Atmosphärische CO2-Konzentration ? Ammoniak ? Muschel ? Meerestemperatur ? Meerwasser ? Uran ? Benthos ? Kohlendioxid ? Salzgehalt ? Chemikalien ? Gewässerzustand ? Laborversuch ? Nordatlantik ? Wasseraufbereitung ? Ammonia sp. ? Biomass/Abundance/Elemental composition ? Bottles or small containers/Aquaria (<20 L) ? Chromista ? Coast and continental shelf ? Foraminifera ? Heterotrophic prokaryotes ? Single species ? Temperate ?
Region: Wadden Sea
Bounding boxes: 8.479° .. 8.479° x 53.7014° .. 53.7014°
License: cc-by/3.0
Language: Englisch/English
Issued: 2013-10-24
Modified: 2022-12-15
Time ranges: 2011-01-01 - 2011-05-01
Accessed 1 times.