DOI: 10.5194/cp-9-2507-2013
Scopus记录号: 2-s2.0-84919495360
论文题名: A reconstruction of atmospheric carbon dioxide and its stable carbon isotopic composition from the penultimate glacial maximum to the last glacial inception
作者: Schneider R. ; Schmitt J. ; Köhler P. ; Joos F. ; Fischer H.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 6 起始页码: 2507
结束页码: 2523
语种: 英语
英文摘要: The reconstruction of the stable carbon isotope evolution in atmospheric CO2 (δ13Catm), 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® (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. We find a 0.4 ‰ 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. © Author(s) 2013. 资助项目: AWI, Massachusetts Department of Fish and Game
; DFG, Massachusetts Department of Fish and Game
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49494
Appears in Collections: 气候变化与战略
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Recommended Citation:
Schneider R.,Schmitt J.,Köhler P.,et al. A reconstruction of atmospheric carbon dioxide and its stable carbon isotopic composition from the penultimate glacial maximum to the last glacial inception[J]. Climate of the Past,2013-01-01,9(6)