| DOI: | 10.1016/j.quascirev.2016.01.015
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| Scopus记录号: | 2-s2.0-84957065350
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| 论文题名: | Pore fluids and the LGM ocean salinity-Reconsidered |
| 作者: | Wunsch C.
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| 刊名: | Quaternary Science Reviews
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| ISSN: | 2773791
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| 出版年: | 2016
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| 卷: | 135 | | 起始页码: | 154
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| 结束页码: | 170
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| 语种: | 英语
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| 英文关键词: | Abyssal ocean
; Last glacial maximum
; Ocean salinity
; Pore waters
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| Scopus关键词: | Diffusion in liquids
; Glacial geology
; Linear control systems
; Sea level
; Abyssal ocean
; Last Glacial Maximum
; Linear control theory
; North Atlantic Ocean
; Ocean salinity
; Pore waters
; Pore-fluid salinity
; Salinity distributions
; Oceanography
; abyssal circulation
; abyssal zone
; advection
; deglaciation
; Last Glacial Maximum
; pore pressure
; porewater
; salinity
; uncertainty analysis
; water depth
; Atlantic Ocean
; Atlantic Ocean (North)
; Bermuda Rise
; Southern Ocean
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| 英文摘要: | Pore fluid chlorinity/salinity data from deep-sea cores related to the salinity maximum of the last glacial maximum (LGM) are analyzed using estimation methods deriving from linear control theory. With conventional diffusion coefficient values and no vertical advection, results show a very strong dependence upon initial conditions at -100 ky. Earlier inferences that the abyssal Southern Ocean was strongly salt-stratified in the LGM with a relatively fresh North Atlantic Ocean are found to be consistent within uncertainties of the salinity determination, which remain of order ±1 g/kg. However, an LGM Southern Ocean abyss with an important relative excess of salt is an assumption, one not required by existing core data. None of the present results show statistically significant abyssal salinity values above the global average, and results remain consistent, apart from a general increase owing to diminished sea level, with a more conventional salinity distribution having deep values lower than the global mean. The Southern Ocean core does show a higher salinity than the North Atlantic one on the Bermuda Rise at different water depths. Although much more sophisticated models of the pore-fluid salinity can be used, they will only increase the resulting uncertainties, unless considerably more data can be obtained. Results are consistent with complex regional variations in abyssal salinity during deglaciation, but none are statistically significant. © 2016 Elsevier Ltd. |
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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/59671
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States
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| Recommended Citation: | |
Wunsch C.. Pore fluids and the LGM ocean salinity-Reconsidered[J]. Quaternary Science Reviews,2016-01-01,135
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