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Boron isotope constraints on deglacial deepwater formation and CO (sub 2) release from the North Pacific

James W. B. Rae, Andy Ridgwell, Gavin L. Foster, Michael Sarnthein, Pieter M. Grootes and Tim Elliott
Boron isotope constraints on deglacial deepwater formation and CO (sub 2) release from the North Pacific (in Goldschmidt 2012 abstract volume, Anonymous)
Mineralogical Magazine (2012) 76 (6): 2263

Abstract

Deep convective mixing is thought to play a key role in glacial-interglacial cycles in atmospheric CO (sub 2) by providing a pathway for carbon between the deep ocean and the atmosphere. Such mixing is inhibited in the subpolar North Pacific by very low surface water salinity, and as a result the North Pacific is not typically thought to play a direct role in glacial-interglacial CO (sub 2) change. Here we challenge this assumption with new boron isotope and radiocarbon data, that track the behavior of carbon in the deep North Pacific over the last deglaciation. We show that over the last deglaciation deep water formed to 3600 m in the North Pacific. This is supported by experiments with an earth system model, which show that deep mixing in the North Pacific can account for a significant proportion of atmospheric CO (sub 2) rise during deglaciations.


ISSN: 0026-461X
EISSN: 1471-8022
Coden: MNLMBB
Serial Title: Mineralogical Magazine
Serial Volume: 76
Serial Issue: 6
Title: Boron isotope constraints on deglacial deepwater formation and CO (sub 2) release from the North Pacific
Title: Goldschmidt 2012 abstract volume
Affiliation: University of Bristol, Bristol, United Kingdom
Pages: 2263
Published: 2012
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
Meeting name: Goldschmidt 2012
Meeting location: Montreal, QC, CAN, Canada
Meeting date: 20120624June 24-29, 2012
References: 2
Summary: Y
Accession Number: 2014-025018
Categories: Quaternary geologyIsotope geochemistry
Document Type: Serial Conference document
Bibliographic Level: Analytic
Secondary Affiliation: University of Southampton, GBR, United KingdomUniversity of Kiel, DEU, Germany
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
Update Code: 201416
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