| DOI: | 10.5194/cp-12-1079-2016
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| Scopus记录号: | 2-s2.0-84966708484
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| 论文题名: | A Late Pleistocene sea level stack |
| 作者: | Spratt R.M.; Lisiecki L.E.
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| 刊名: | Climate of the Past
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| ISSN: | 18149324
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| 出版年: | 2016
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| 卷: | 12, 期:4 | | 起始页码: | 1079
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| 结束页码: | 1092
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| 语种: | 英语
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| Scopus关键词: | bootstrapping
; coral
; core analysis
; Holocene
; Last Glacial Maximum
; marine isotope stage
; marine sediment
; oxygen isotope
; principal component analysis
; proxy climate record
; reconstruction
; salinity
; sea level change
; signal-to-noise ratio
; uncertainty analysis
; Anthozoa
|
| 英文摘要: | Late Pleistocene sea level has been reconstructed from ocean sediment core data using a wide variety of proxies and models. However, the accuracy of individual reconstructions is limited by measurement error, local variations in salinity and temperature, and assumptions particular to each technique. Here we present a sea level stack (average) which increases the signal-to-noise ratio of individual reconstructions. Specifically, we perform principal component analysis (PCA) on seven records from 0 to 430 ka and five records from 0 to 798 ka. The first principal component, which we use as the stack, describes ∼80% of the variance in the data and is similar using either five or seven records. After scaling the stack based on Holocene and Last Glacial Maximum (LGM) sea level estimates, the stack agrees to within 5 m with isostatically adjusted coral sea level estimates for Marine Isotope Stages 5e and 11 (125 and 400 ka, respectively). Bootstrapping and random sampling yield mean uncertainty estimates of 9-12 m (1σ) for the scaled stack. Sea level change accounts for about 45% of the total orbital-band variance in benthic δ18O, compared to a 65% contribution during the LGM-to-Holocene transition. Additionally, the second and third principal components of our analyses reflect differences between proxy records associated with spatial variations in the δ18O of seawater. © Author(s) 2016. |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49020
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Spratt R.M.,Lisiecki L.E.. A Late Pleistocene sea level stack[J]. Climate of the Past,2016-01-01,12(4)
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