Globally increased pelagic carbonate production during the mid-Brunhes dissolution interval and the CO2 paradox of MIS 11

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doi: 10.1016/j.quascirev.2006.07.018
Author(s): Barker, Stephen; Archer, David; Booth, Linda; Elderfield, Henry; Henderiks, Jorijntje; Rickaby, Rosalind E. M.
Author Affiliation(s): Primary:
Lamont-Doherty Earth Observatory, Palisades, NY, United States
Other:
University of Leeds, United Kingdom
University of Cambridge, United Kingdom
University of Chicago, United States
Stockholm University, Sweden
University of Oxford, United Kingdom
Volume Title: Critical Quaternary stratigraphy
Volume Author(s): Rose, James, editor; Tzedakis, Chronis; Elderfield, Henry
Source: Critical Quaternary stratigraphy, edited by James Rose, Chronis Tzedakis and Henry Elderfield. Quaternary Science Reviews, 25(23-24), p.3278-3293. Publisher: Elsevier, International. ISSN: 0277-3791
Note: In English. 94 refs.; illus., incl. 6 tables, sketch map
Summary: The Mid-Brunhes dissolution interval (MBDI) represents a period of global carbonate dissolution, lasting several hundred thousand years, centred around Marine Isotope Stage (MIS) 11. Here we report the effects of dissolution in ODP core 982, taken from 1134 m in the North Atlantic. Paradoxically, records of atmospheric CO2 from Antarctic ice-cores reveal no long term trend over the last 400 kyr and suggest that CO2 during MIS 11 was no higher than during the present interglacial. We suggest that a global increase in pelagic carbonate production during this period, possibly related to the proliferation of the Gephyrocapsa coccolithophore, could have altered marine carbonate chemistry in such a way as to drive increased dissolution under the constraints of steady state. An increase in the production of carbonate in surface waters would cause a drawdown of global carbonate saturation and increase dissolution at the seafloor. In order to reconcile the record of atmospheric CO2 variability we suggest that an increase in the flux of organic matter from the surface to deep ocean, associated with either a net increase in primary production or the enhanced ballasting effect provided by an increased flux of CaCO3, could have countered the effect of increased calcification on CO2. Abstract Copyright (2006) Elsevier, B.V.
Year of Publication: 2006
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Algae; Alkaline earth metals; Antarctica; Atlantic Ocean; Brunhes Chron; C-13/C-12; Calcification; Calcium; Calcium carbonate; Carbon; Carbon dioxide; Carbonate sediments; Cenozoic; Chemical ratios; Climate change; Coccolithophoraceae; Cores; Correlation; Dome C; EPICA; Foraminifera; Geochemistry; Gephyrocapsa; Globigerina; Globigerinacea; Globigerinidae; Ice cores; Invertebrata; Isotope ratios; Isotopes; Leg 162; MIS 11; Marine sediments; Metals; Microfossils; North Atlantic; ODP Site 982; Ocean Drilling Program; Organic carbon; Paleo-oceanography; Paleoclimatology; Pelagic environment; Plantae; Protista; Quaternary; Rockall Bank; Rotaliina; Sediments; Shells; Sr/Ca; Stable isotopes; Strontium; Upper Quaternary; Wilkes Land
Coordinates: N573100 N573100 W0155200 W0155200
Record ID: 2010003545
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands