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Changement climatique - Recherche française (avec laboratoires CNRS) - 2010-2015

Title

Carbon Isotope Constraints on the Deglacial CO2 Rise from Ice Cores

Publication Year

2012

Author(s)
  • Schmitt, Jochen
  • Schneider, Robert
  • Elsig, Joachim
  • Leuenberger, Daiana
  • Lourantou, Anna
  • Chappellaz, Jerome
  • Koehler, Peter
  • Joos, Fortunat
  • Stocker, Thomas F.
  • Leuenberger, Markus
  • Fischer, Hubertus
Source
SCIENCE Volume: 336 Issue: 6082 Pages: 711-714 Published: 2012
ISSN
0036-8075
Abstract

The stable carbon isotope ratio of atmospheric CO2 (delta C-13(atm)) is a key parameter in deciphering past carbon cycle changes. Here we present delta C-13(atm) data for the past 24,000 years derived from three independent records from two Antarctic ice cores. We conclude that a pronounced 0.3 per mil decrease in delta C-13(atm) during the early deglaciation can be best explained by upwelling of old, carbon-enriched waters in the Southern Ocean. Later in the deglaciation, regrowth of the terrestrial biosphere, changes in sea surface temperature, and ocean circulation governed the delta C-13(atm) evolution. During the Last Glacial Maximum, delta C-13(atm) and atmospheric CO2 concentration were essentially constant, which suggests that the carbon cycle was in dynamic equilibrium and that the net transfer of carbon to the deep ocean had occurred before then.

KeyWord(s) Plus
  • HIGH-RESOLUTION RECORD
  • LAST GLACIAL MAXIMUM
  • ATMOSPHERIC CO2
  • SOUTHERN-OCEAN
  • AGE
  • VENTILATION
  • GREENLAND
  • EXCHANGE
  • CYCLES
  • C-14
ESI Discipline(s)
  • Multidisciplinary
Web of Science Category(ies)
  • Multidisciplinary Sciences
Adress(es)

[Schmitt, Jochen; Schneider, Robert; Elsig, Joachim; Leuenberger, Daiana; Joos, Fortunat; Stocker, Thomas F.; Leuenberger, Markus; Fischer, Hubertus] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland; [Schmitt, Jochen; Schneider, Robert; Elsig, Joachim; Leuenberger, Daiana; Joos, Fortunat; Stocker, Thomas F.; Leuenberger, Markus; Fischer, Hubertus] Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland; [Schmitt, Jochen; Koehler, Peter; Fischer, Hubertus] Alfred Wegener Inst Polar & Marine Res, D-27570 Bremerhaven, Germany; [Lourantou, Anna; Chappellaz, Jerome] Univ Grenoble 1, CNRS, LGGE, UMR 5183, F-38041 Grenoble, France

Reprint Adress

Schmitt, J (reprint author), Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.

Country(ies)
  • France
  • Germany
  • Switzerland
CNRS - Adress(es)
  • Laboratoire de glaciologie et géophysique de l'environnement (LGGE), UMR5183
Accession Number
WOS:000303872300047
uid:/R0VBC29S
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