δ11B isotopes, CO2 release and pH analysis from ODP Site 177-1090

Over the last deglaciation there were two transient intervals of pronounced atmospheric CO2 rise; Heinrich Stadial 1 (17.5-15 kyr) and the Younger Dryas (12.9-11.5 kyr). Leading hypotheses accounting for the increased accumulation of CO2 in the atmosphere at these times invoke deep ocean carbon bein...

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Bibliographic Details
Main Authors: Shuttleworth, Rachael, Bostock, Helen C, Chalk, Thomas B, Calvo, Eva, Jaccard, Samuel L, Pelejero, Carles, Martínez-García, Alfredo, Foster, Gavin L
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2021
Subjects:
alkenones
boron isotopes
deglacial
ODP 1090
Sub-Antarctic
TAN1106-28
Depth, top/min
Depth, bottom/max
DEPTH, sediment/rock
AGE
Age, standard deviation
Size fraction
δ11B
δ11B, standard deviation
Magnesium/Calcium ratio
DEPTH, water
pH
Carbon dioxide, partial pressure
Composite Core
MC-ICP-MS Thermo-Finnigan Neptune
Calculated
Leg177
Joides Resolution
Antarctic
Southern Ocean
Antarc*
Online Access:https://dx.doi.org/10.1594/pangaea.929097
https://doi.pangaea.de/10.1594/PANGAEA.929097
Description
Summary:Over the last deglaciation there were two transient intervals of pronounced atmospheric CO2 rise; Heinrich Stadial 1 (17.5-15 kyr) and the Younger Dryas (12.9-11.5 kyr). Leading hypotheses accounting for the increased accumulation of CO2 in the atmosphere at these times invoke deep ocean carbon being released from the Southern Ocean and an associated decline in the global efficiency of the biological carbon pump. From core ODP1090 we present new G. bulloidies boron isotope and Mg/Ca derived sea surface pH and pCO2 concentrations. Trace element analysis was performed on a ThermoScientific Element 2 ICP-MS at the University of Southampton using the method described by Henehan et al. (2015). Isotopic analysis was performed on a ThermoScientific Neptune MC-ICPMS at the University of Southampton following the methods of Foster (2008; doi:10.1016/j.epsl.2008.04.015) and Foster et al. (2013; doi:10.1016/j.chemgeo.2013.08.027).

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