DOI: 10.1038/ngeo2422
论文题名: Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium
作者: Bauska T.K. ; Joos F. ; Mix A.C. ; Roth R. ; Ahn J. ; Brook E.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 5 起始页码: 383
结束页码: 387
语种: 英语
Scopus关键词: carbon cycle
; carbon dioxide
; carbon emission
; carbon isotope
; carbon sequestration
; climate variation
; decadal variation
; deconvolution
; land use change
; measurement method
; paleoclimate
; peatland
; reconstruction
; resolution
; timescale
; Antarctic Ice Sheet
; Antarctica
英文摘要: The stability of terrestrial carbon reservoirs is thought to be closely linked to variations in climate, but the magnitude of carbon-climate feedbacks has proved difficult to constrain for both modern and millennial timescales. Reconstructions of atmospheric CO2 concentrations for the past thousand years have shown fluctuations on multidecadal to centennial timescales, but the causes of these fluctuations are unclear. Here we report high-resolution carbon isotope measurements of CO2 trapped within the ice of the West Antarctic Ice Sheet Divide ice core for the past 1,000 years. We use a deconvolution approach to show that changes in terrestrial organic carbon stores best explain the observed multidecadal variations in the δ13C of CO2 and in CO2 concentrations from 755 to 1850 CE. If significant long-term carbon emissions came from pre-industrial anthropogenic land-use changes over this interval, the emissions must have been offset by a natural terrestrial sink for 13 C-depleted carbon, such as peatlands. We find that on multidecadal timescales, carbon cycle changes seem to vary with reconstructed regional climate changes. We conclude that climate variability could be an important control of fluctuations in land carbon storage on these timescales. © 2015 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106373
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Climate and Environmental Physics, Physics Institute and Oeschger Center for Climate Change Research, University of Bern, Bern, Switzerland; School of Earth and Environmental Science, Seoul National University, Seoul, South Korea
Recommended Citation:
Bauska T.K.,Joos F.,Mix A.C.,et al. Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium[J]. Nature Geoscience,2015-01-01,8(5)