B-isotope and Mg/Ca ratios of planktonic foraminifera from ODP Hole 108-668B and esimates of salinity, alkalinity and pCO2 (Table 1) ...

Knowledge of past atmospheric pCO2 is important for evaluating the role of greenhouse gases in climate forcing. Ice core records show the tight correlation between climate change and pCO2, but records are limited to the past ~900 kyr. We present surface ocean pH and pCO2 data, reconstructed from bor...

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Bibliographic Details
Main Authors: Hönisch, Bärbel, Hemming, N Gary
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
AGE
Sample code/label
δ11B
δ11B, standard deviation
Number
pH
Globigerinoides ruber, Magnesium/Calcium ratio
Magnesium/Calcium ratio, standard deviation
Sea surface temperature, annual mean
Mass
δ18O, water
Salinity
Alkalinity, total
Carbon dioxide, partial pressure
Sea level variation
Drilling/drill rig
DSDP/ODP/IODP sample designation
Thermal Ionization Mass Spectrometry TIMS
Calculated
Inductively coupled plasma - mass spectrometry ICP-MS
Calculated from Mg/Ca ratios Dekens et al. 2002
Leg108
Joides Resolution
Ocean Drilling Program ODP
ice core
Planktonic foraminifera
Online Access:https://dx.doi.org/10.1594/pangaea.712921
https://doi.pangaea.de/10.1594/PANGAEA.712921
Description
Summary:Knowledge of past atmospheric pCO2 is important for evaluating the role of greenhouse gases in climate forcing. Ice core records show the tight correlation between climate change and pCO2, but records are limited to the past ~900 kyr. We present surface ocean pH and pCO2 data, reconstructed from boron isotopes in planktonic foraminifera over two full glacial cycles (0-140 and 300-420 kyr). The data co-vary strongly with the Vostok pCO2-record and demonstrate that the coupling between surface ocean chemistry and the atmosphere is recorded in marine archives, allowing for quantitative estimation of atmospheric pCO2 beyond the reach of ice cores. ... : Continental ice volume effect on d18Oseawater and sea level was derived from Waelbroeck et al. (2002, doi:10.1016/S0277-3791(01)00101-9). Model 1 uses the deconvolution of foraminiferal d18O and Mg/Ca to yield local salinity, Model 2 uses the theoretical concentration of salt due to changing sea level. Ages are derived from correlation of the ODP 668B oxygen isotope stratigraphy with the Vostok gas age scale. Boron data are acceptable if >=3. Note that ages of samples 19-22 were estimated by extending the linear correlation between the Vostok gas age scale and the sedimentation rate in ODP 668B. ...

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