| DOI: | 10.5194/cp-12-1281-2016
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| Scopus记录号: | 2-s2.0-84973548683
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| 论文题名: | Last Glacial Maximum and deglacial abyssal seawater oxygen isotopic ratios |
| 作者: | Wunsch C.
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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:6 | | 起始页码: | 1281
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| 结束页码: | 1296
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| 语种: | 英语
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| Scopus关键词: | abyssal zone
; calcite
; deep water
; deglaciation
; diffusion
; ice cover
; isotopic ratio
; Last Glacial Maximum
; oxygen isotope
; paleoclimate
; porewater
; salinity
; uncertainty analysis
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| 英文摘要: | An earlier analysis of pore-water salinity (chlorinity) in two deep-sea cores, using terminal constraint methods of control theory, concluded that although a salinity amplification in the abyss was possible during the LGM, it was not required by the data. Here the same methodology is applied to δ18Ow in the upper 100m of four deep-sea cores. An ice volume amplification to the isotopic ratio is, again, consistent with the data but not required by it. In particular, results are very sensitive, with conventional diffusion values, to the assumed initial conditions at-100 ky and a long list of noise (uncertainty) assumptions. If the calcite values of δ18O are fully reliable, then published enriched values of the ratio in seawater are necessary to preclude sub-freezing temperatures, but the seawater δ18O in pore fluids does not independently require the conclusion. © 2016 Author(s). |
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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/49007
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Wunsch C.. Last Glacial Maximum and deglacial abyssal seawater oxygen isotopic ratios[J]. Climate of the Past,2016-01-01,12(6)
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