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Ronge TA, Tiedemann R, Lamy F, Köhler P, Alloway BV, De Pol-Holz R, Pahnke K, Southon J, Wacker L. Radiocarbon constraints on the extent and evolution of the South Pacific glacial carbon pool. Nat Commun 2016; 7:11487. [PMID: 27157845 PMCID: PMC4865812 DOI: 10.1038/ncomms11487] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 04/01/2016] [Indexed: 11/09/2022] Open
Abstract
During the last deglaciation, the opposing patterns of atmospheric CO2 and radiocarbon activities (Δ(14)C) suggest the release of (14)C-depleted CO2 from old carbon reservoirs. Although evidences point to the deep Pacific as a major reservoir of this (14)C-depleted carbon, its extent and evolution still need to be constrained. Here we use sediment cores retrieved along a South Pacific transect to reconstruct the spatio-temporal evolution of Δ(14)C over the last 30,000 years. In ∼2,500-3,600 m water depth, we find (14)C-depleted deep waters with a maximum glacial offset to atmospheric (14)C (ΔΔ(14)C=-1,000‰). Using a box model, we test the hypothesis that these low values might have been caused by an interaction of aging and hydrothermal CO2 influx. We observe a rejuvenation of circumpolar deep waters synchronous and potentially contributing to the initial deglacial rise in atmospheric CO2. These findings constrain parts of the glacial carbon pool to the deep South Pacific.
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Affiliation(s)
- T A Ronge
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department for Marine Geology, PO Box 120161, Bremerhaven 27515, Germany
| | - R Tiedemann
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department for Marine Geology, PO Box 120161, Bremerhaven 27515, Germany
| | - F Lamy
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department for Marine Geology, PO Box 120161, Bremerhaven 27515, Germany
| | - P Köhler
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department for Marine Geology, PO Box 120161, Bremerhaven 27515, Germany
| | - B V Alloway
- School of Geography, Environment and Earth Sciences, Victoria University of Wellington, PO Box 600, 6012 Wellington, New Zealand
| | - R De Pol-Holz
- GAIA-Antartica, Universidad de Magallanes, Punta Arenas 01855, Chile
| | - K Pahnke
- Max Planck Research Group-Marine Isotope Geochemistry, Institute for Chemistry and Biology of the Marine Environment, Department of Marine Isotope Geochemistry, Carl von Ossietzky University, PO Box 2503, Oldenburg 26111, Germany
| | - J Southon
- School of Physical Science, Department of Earth Science, University of California, Irvine, California 92697-4675, USA
| | - L Wacker
- Laboratory of Ion Beam Physics (HPK), Eidgenössische Technische Hochschule, Schafmattstrasse 20, Zürich 8093, Switzerland
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Beu AG, Alloway BV, Pillans BJ, Naish TR, Westgate JA. Marine Mollusca of oxygen isotope stages of the last 2 million years in New Zealand. Part 1: Revised generic positions and recognition of warm‐water and cool‐water migrants. J R Soc N Z 2010. [DOI: 10.1080/03014223.2004.9517766] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- A. G. Beu
- a Institute of Geological & Nuclear Sciences , P.O. Box 30 368, Lower Hutt, New Zealand E-mail:
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McDowall RM, Kennedy EM, Lindqvist JK, Lee DE, Alloway BV, Gregory MR. ProbableGobiomorphusfossils from the Miocene and Pleistocene of New Zealand (Teleostei: Eleotridae). J R Soc N Z 2006. [DOI: 10.1080/03014223.2006.9517803] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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McDowall RM, Kennedy EM, Alloway BV. A fossil southern grayling, genusPrototroctes,from the Pleistocene of north‐eastern New Zealand (Teleostei: Retropinnidae). J R Soc N Z 2006. [DOI: 10.1080/03014223.2006.9517797] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Naish TR, Field BD, Zhu H, Melhuish A, Carter RM, Abbott ST, Edwards S, Alloway BV, Wilson GS, Niessen F, Barker A, Browne GH, Maslen G. Integrated outcrop, drill core, borehole and seismic stratigraphic architecture of a cyclothemic, shallow‐marine depositional system, Wanganui Basin, New Zealand. J R Soc N Z 2005. [DOI: 10.1080/03014223.2005.9517778] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Horrocks M, Ogden J, Nichol SL, Alloway BV, Sutton DG. A Late Quaternary palynological and sedimentological record from two coastal swamps at southern Kaitoke, Great Barrier Island, New Zealand. J R Soc N Z 2000. [DOI: 10.1080/03014223.2000.9517609] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Horrocks M, Ogden J, Nichol SL, Alloway BV, Sutton DG. Palynology, sedimentology and environmental significance of Holocene swamps at northern Kaitoke, Great Barrier Island, New Zealand. J R Soc N Z 2000. [DOI: 10.1080/03014223.2000.9517608] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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