Measurements of stable carbon isotope ratios of CO2 over the last 24000 years and CO2 concentration measurements on Antarctic ice cores using three different methods
Cobertura |
MEDIAN LATITUDE: -74.645556 * MEDIAN LONGITUDE: 130.520000 * SOUTH-BOUND LATITUDE: -75.100000 * WEST-BOUND LONGITUDE: 123.350000 * NORTH-BOUND LATITUDE: -72.827778 * EAST-BOUND LONGITUDE: 159.200000 * DATE/TIME START: 2005-01-01T00:00:00 * DATE/TIME END: 2005-01-01T00:00:00 |
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Data(s) |
13/12/2012
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Resumo |
The stable carbon isotope ratio of atmospheric CO2 (d13Catm) is a key parameter in deciphering past carbon cycle changes. Here we present d13Catm 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 d13Catm 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 d13Catm evolution. During the Last Glacial Maximum, d13Catm 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. |
Formato |
application/zip, 6 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.772713 doi:10.1594/PANGAEA.772713 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Schmitt, Jochen; Schneider, Robert; Elsig, Joachim; Leuenberger, Daiana; Lourantou, Anna; Chappellaz, Jérôme A; Köhler, Peter; Joos, Fortunat; Stocker, Thomas F; Leuenberger, Markus; Fischer, Hubertus (2012): Carbon isotope constraints on the deglacial CO2 rise from ice cores. Science, 336(6082), 711-714, doi:10.1126/science.1217161 |
Palavras-Chave | #1-sigma; Antarctica; applied gravitational correction in per mil; Calculated; Carbon dioxide; Carbon dioxide, standard deviation; CO2; CO2 std dev; corr; Correction; d13C CO2; d13C CO2 std dev; delta 13C, carbon dioxide, atmospheric; delta 13C, carbon dioxide, standard deviation; DEPTH, ice/snow; Depth ice/snow; Dome C; DRILL; Drilling/drill rig; EDC96; EDC99; EPICA; European Project for Ice Coring in Antarctica; Gas age; ICEDRILL; Ice drill; Repl; Replicates; TALDICE; Talos_Dome |
Tipo |
Dataset |