globalchange  > 气候变化事实与影响
DOI: 10.1002/2015GB005207
Scopus记录号: 2-s2.0-84955173399
论文题名:
Impact of oceanic circulation changes on atmospheric δ13CO2
作者: Menviel L; , Mouchet A; , Meissner K; J; , Joos F; , England M; H
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期:11
起始页码: 1944
结束页码: 1961
语种: 英语
英文关键词: AABW ; carbon isotopes ; NADW ; NPDW
Scopus关键词: air-sea interaction ; Antarctic Bottom Water ; Antarctic Intermediate Water ; carbon cycle ; carbon dioxide ; carbon isotope ; deep water ; deep water ventilation ; global climate ; ice core ; North Atlantic Deep Water ; oceanic circulation ; Pacific Ocean ; Pacific Ocean (North)
英文摘要: δ13CO2 measured in Antarctic ice cores provides constraints on oceanic and terrestrial carbon cycle processes linked with millennial-scale changes in atmospheric CO2. However, the interpretation of δ13CO2 is not straightforward. Using carbon isotope-enabled versions of the LOVECLIM and Bern3D models, we perform a set of sensitivity experiments in which the formation rates of North Atlantic Deep Water (NADW), North Pacific Deep Water (NPDW), Antarctic Bottom Water (AABW), and Antarctic Intermediate Water (AAIW) are varied. We study the impact of these circulation changes on atmospheric δ13CO2 as well as on the oceanic δ13C distribution. In general, we find that the formation rates of AABW, NADW, NPDW, and AAIW are negatively correlated with changes in δ13CO2: namely, strong oceanic ventilation decreases atmospheric δ13CO2. However, since large-scale oceanic circulation reorganizations also impact nutrient utilization and the Earth's climate, the relationship between atmospheric δ13CO2 levels and ocean ventilation rate is not unequivocal. In both models atmospheric δ13CO2 is very sensitive to changes in AABW formation rates: increased AABW formation enhances the transport of low δ13C waters to the surface and decreases atmospheric δ13CO2. By contrast, the impact of NADW changes on atmospheric δ13CO2 is less robust and might be model dependent. This results from complex interplay between global climate, carbon cycle, and the formation rate of NADW, a water body characterized by relatively high δ13C. © 2015. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77904
Appears in Collections:气候变化事实与影响

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作者单位: Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia; ARC Centre of Excellence for Climate System Science, Sydney, NSW, Australia; Laboratoire des Sciences du Climat et de l'Environnement, IPSL-CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Department of Astrophysics, Geophysics and Oceanography, Université de Liège, Liège, Belgium; Climate and Environmental Physics, Physics Institute, Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland

Recommended Citation:
Menviel L,, Mouchet A,, Meissner K,et al. Impact of oceanic circulation changes on atmospheric δ13CO2[J]. Global Biogeochemical Cycles,2015-01-01,29(11)
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