Revision of the EPICA Dome C CO2 record from 800 to 600kyr before present

被引：495

作者：

Bereiter, Bernhard ^{[1
,2
]}

Eggleston, Sarah ^{[1
,2
]}

Schmitt, Jochen ^{[1
,2
]}

Nehrbass-Ahles, Christoph ^{[1
,2
]}

Stocker, Thomas F. ^{[1
,2
]}

Fischer, Hubertus ^{[1
,2
]}

Kipfstuhl, Sepp ^{[3
]}

Chappellaz, Jerome ^{[4
]}

机构：

[1] Univ Bern, Inst Phys, Bern, Switzerland

[2] Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland

[3] Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Bremerhaven, Germany

[4] Univ Grenoble Alpes, CNRS, LGGE, Grenoble, France

来源：

GEOPHYSICAL RESEARCH LETTERS | 2015年 / 42卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

CO2; ice core; EPICA; Dome C; greenhouse gas; ICE-CORE; ATMOSPHERIC CO2; LAST DEGLACIATION; CARBON-DIOXIDE; MIXING RATIOS; ANTARCTIC ICE; CYCLE; VARIABILITY; INCLUSIONS; SCALE;

D O I：

10.1002/2014GL061957

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The European Project for Ice Coring in Antarctica Dome ice core from Dome C (EDC) has allowed for the reconstruction of atmospheric CO2 concentrations for the last 800,000years. Here we revisit the oldest part of the EDC CO2 record using different air extraction methods and sections of the core. For our established cracker system, we found an analytical artifact, which increases over the deepest 200m and reaches 10.12.4ppm in the oldest/deepest part. The governing mechanism is not yet fully understood, but it is related to insufficient gas extraction in combination with ice relaxation during storage and ice structure. The corrected record presented here resolves partly - but not completely - the issue with a different correlation between CO2 and Antarctic temperatures found in this oldest part of the records. In addition, we provide here an update of 800,000years atmospheric CO2 history including recent studies covering the last glacial cycle.

引用

页码：542 / 549

页数：8

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