DOI: 10.1016/j.quascirev.2015.08.010
Scopus记录号: 2-s2.0-84939780603
论文题名: Global-mean marine δ13C and its uncertainty in a glacial state estimate
作者: Gebbie G. ; Peterson C.D. ; Lisiecki L.E. ; Spero H.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 125 起始页码: 144
结束页码: 159
语种: 英语
英文关键词: Carbon reservoirs
; Inverse methods
; Last glacial maximum
; Paleoceanography
; Physical oceanography
Scopus关键词: Errors
; Glacial geology
; Inverse problems
; Oceanography
; Reservoirs (water)
; State estimation
; Uncertainty analysis
; Carbon reservoirs
; Inverse methods
; Last Glacial Maximum
; Paleoceanography
; Physical oceanography
; C (programming language)
; carbon isotope
; dissolved inorganic carbon
; estimation method
; Last Glacial Maximum
; marine environment
; oceanic circulation
; oxygen isotope
; paleoceanography
; physical oceanography
; water mass
英文摘要: A paleo-data compilation with 492 δ13C and δ18O observations provides the opportunity to better sample the Last Glacial Maximum (LGM) and infer its global properties, such as the mean δ13C of dissolved inorganic carbon. Here, the paleo-compilation is used to reconstruct a steady-state water-mass distribution for the LGM, that in turn is used to map the data onto a 3D global grid. A global-mean marine δ13C value and a self-consistent uncertainty estimate are derived using the framework of state estimation (i.e., combining a numerical model and observations). The LGM global-mean δ13C is estimated to be 0.14‰ ± 0.20‰ at the two standard error level, giving a glacial-to-modern change of 0.32‰ ± 0.20‰. The magnitude of the error bar is attributed to the uncertain glacial ocean circulation and the lack of observational constraints in the Pacific, Indian, and Southern Oceans. To halve the error bar, roughly four times more observations are needed, although strategic sampling may reduce this number. If dynamical constraints can be used to better characterize the LGM circulation, the error bar can also be reduced to 0.05 to 0.1‰, emphasizing that knowledge of the circulation is vital to accurately map δ13C in three dimensions. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59839
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Physical Oceanography, Woods Hole Oceanographic Institution, 360 Woods Hole Rd., MS # 29, Woods Hole, MA, United States; Department of Earth Science, University of California, Santa Barbara, CA, United States; Department of Earth and Planetary Sciences, University of California, Davis, CA, United States
Recommended Citation:
Gebbie G.,Peterson C.D.,Lisiecki L.E.,et al. Global-mean marine δ13C and its uncertainty in a glacial state estimate[J]. Quaternary Science Reviews,2015-01-01,125