A reconstruction of atmospheric carbon dioxide and its stable carbon isotopic composition from the penultimate glacial maximum to the last glacial inception

Online Access: Get full text
doi: 10.5194/cp-9-2507-2013
Author(s): Schneider, R.; Schmitt, J.; Köhler, P.; Joos, F.; Fischer, H.
Author Affiliation(s): Primary:
University of Bern, Climate and Environmental Physics, Bern, Switzerland
Other:
Alfred-Wegener-Institut für Polar- und Meeresforschung Forschungestelle, Germany
Volume Title: Climate of the Past
Source: Climate of the Past, 9(6), p.2507-2523. Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1814-9324
Note: In English. Part of special issue no. 55, International Partnerships in Ice Core Sciences (IPICS); 2012 first open science conference, http://www.clim-past.net/special_issue55.html; ; published in Climate of the Past Discussion: 8 April 2013, http://www.clim-past-discuss.net/9/2015/2013/cpd-9-2015-2013.html; accessed in June, 2014. 99 refs.; illus.
Summary: The reconstruction of the stable carbon isotope evolution in atmospheric CO213Catm), as archived in Antarctic ice cores, bears the potential to disentangle the contributions of the different carbon cycle fluxes causing past CO2 variations. Here we present a new record of δ13Catm before, during and after the Marine Isotope Stage 5.5 (155 000 to 105 000 yr BP). The dataset is archived on the data repository PANGEA(R) (www.pangea.de) under doi:10.1594/PANGAEA.817041. The record was derived with a well established sublimation method using ice from the EPICA Dome C (EDC) and the Talos Dome ice cores in East Antarctica. per mil a 0.4 ppm shift to heavier values between the mean δ13Catm level in the Penultimate (∼ 140 000 yr BP) and Last Glacial Maximum (∼ 22 000 yr BP), which can be explained by either (i) changes in the isotopic composition or (ii) intensity of the carbon input fluxes to the combined ocean/atmosphere carbon reservoir or (iii) by long-term peat buildup. Our isotopic data suggest that the carbon cycle evolution along Termination II and the subsequent interglacial was controlled by essentially the same processes as during the last 24 000 yr, but with different phasing and magnitudes. Furthermore, a 5000 yr lag in the CO2 decline relative to EDC temperatures is confirmed during the glacial inception at the end of MIS5.5 (120 000 yr BP). Based on our isotopic data this lag can be explained by terrestrial carbon release and carbonate compensation.
Year of Publication: 2013
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Antarctica; Atlantic Ocean; Bootstrapping; C-13/C-12; Calcium carbonate; Cape Basin; Carbon; Carbon dioxide; Carbonate compensation depth; Cenozoic; Climate change; Composition; Deep-water environment; Deglaciation; Dome C; EPICA; East Antarctica; Holocene; Ice cores; Interglacial environment; Isotope ratios; Isotopes; Last glacial maximum; Leg 177; MIS 5; Monte Carlo analysis; N-15/N-14; Nitrogen; North Atlantic Deep Water; ODP Site 1089; ODP Site 1090; Ocean Drilling Program; Pacific Ocean; Paleoatmosphere; Paleocirculation; Paleoenvironment; Pleistocene; Preservation; Quaternary; South Atlantic; Southern Ocean; Stable isotopes; Statistical analysis; Talos Dome; Wilkes Land
Coordinates: S405611 S405611 E0095338 E0095338
S425449 S425449 E0085359 E0085359
Record ID: 2014047130
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany