Constraint of the CO2 rise by new atmospheric carbon isotopic measurements during the last deglaciation

被引：90

作者：

Lourantou, Anna ^{[1
]}

Lavric, Jost V. ^{[1
,3
]}

Koehler, Peter ^{[2
]}

Barnola, Jean-Marc ^{[1
]}

Paillard, Didier ^{[3
]}

Michel, Elisabeth ^{[3
]}

Raynaud, Dominique ^{[1
]}

Chappellaz, Jerome ^{[1
]}

机构：

[1] Univ Grenoble 1, CNRS, Lab Glaciol & Geophys Environm, F-38402 St Martin Dheres, France

[2] Alfred Wegener Inst Polar & Marine Res, D-27570 Bremerhaven, Germany

[3] Univ Versailles St Quentin, CNRS, IPSL, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France

来源：

GLOBAL BIOGEOCHEMICAL CYCLES | 2010年 / 24卷

关键词：

SOUTHERN-OCEAN; GLACIAL MAXIMUM; HIGH-PRECISION; ANTARCTIC ICE; KEELING PLOTS; CYCLE; CIRCULATION; AIR; DELTA-C-13; RECORD;

D O I：

10.1029/2009GB003545

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The causes of the similar to 80 ppmv increase of atmospheric carbon dioxide (CO2) during the last glacial-interglacial climatic transition remain debated. We analyzed the parallel evolution of CO2 and its stable carbon isotopic ratio (delta(CO2)-C-13) in the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core to bring additional constraints. Agreeing well but largely improving the Taylor Dome ice core record of lower resolution, our delta(CO2)-C-13 record is characterized by a W shape, with two negative delta(CO2)-C-13 excursions of 0.5 parts per thousand during Heinrich 1 and Younger Dryas events, bracketing a positive delta(CO2)-C-13 peak during the Bolling/Allerod warm period. The comparison with marine records and the outputs of two C cycle box models suggest that changes in Southern Ocean ventilation drove most of the CO2 increase, with additional contributions from marine productivity changes on the initial CO2 rise and delta(CO2)-C-13 decline and from rapid vegetation buildup during the CO2 plateau of the Bolling/Allerod.

引用

页数：15

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