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

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",
)

Types: 
DataMeasurements(
    DataMeasurements {
        domain: Unspecified,
        station: None,
        measured_variables: [
            "Alkalinity, total",
            "Aragonite saturation state",
            "Bicarbonate ion",
            "Calcite saturation state",
            "Carbon dioxide",
            "Carbon, inorganic, dissolved",
            "Carbonate ion",
            "Carbonate system computation flag",
            "Coefficient",
            "Experimental treatment",
            "Fugacity of carbon dioxide (water) at sea surface temperature (wet air)",
            "Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)",
            "Salinity",
            "Temperature, water",
            "Uranium/Calcium ratio",
            "pH, total scale",
        ],
        methods: [
            "Calculated using CO2SYS",
            "Calculated using seacarb after Nisumaa et al. (2010)",
            "Calculated, see reference(s)",
            "Conductivity and pH meter, pH/Cond 340i (WTW, Weilheim)",
            "Photometrically using autoanalyzer QUAATRO",
        ],
    },
)

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 ? Zooplankton ? Kohlendioxid ? Salzgehalt ? Benthos ? Chemikalien ? Gewässerzustand ? Laborversuch ? Nordatlantik ? Wasseraufbereitung ? Ammonia sp. ? Biomass/Abundance/Elemental composition ? Bottles or small containers/Aquaria (<20 L) ? Chromista ? Coast and continental shelf ? Foraminifera ? 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

Organisations

Persons

Issued: 2013-10-24

Modified: 2025-09-05

Time ranges: 2011-01-01 - 2011-05-01

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