The Information Content of Pore Fluid δ18O and [Cl−]
The Information Content of Pore Fluid δ18O and [Cl−]
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孔隙流体δ18O和[Cl−]的信息含量
DOI：
10.1175/jpo-d-14-0203.1
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发表时间：
2015
影响因子：
3.5
通讯作者：
S. Minson
中科院分区：
文献类型：
--
作者：
Madeline D. Miller;M. Simons;J. Adkins;S. Minson
古海洋学指标表明，末次盛冰期（LGM）的海洋状态与现代海洋状态不同。海洋沉积物孔隙流体的深度剖面δ18O和[Cl−]已被用来重建末次冰期的δ18O和盐度。在这里，孔隙流体剖面是否可以约束海洋δ 18 O和盐度在其他时间，同时，他们的约束LGM δ 18 O和盐度的能力进行了研究。一个逆框架的开发，依赖于贝叶斯参数估计，从而允许正式分离的先验假设的观测信息。综合问题是用来探索过去的海洋示踪剂，可以恢复从孔隙流体剖面的信息。深海混合时间尺度的先验知识是从现代孔隙流体剖面精确反演末次大冰期海洋盐度和δ 18 O的必要条件。最后，对近1万年来的盐度和δ 18 O及其估算误差进行了讨论。
AbstractPaleoceanographic proxies indicate that the ocean state during the Last Glacial Maximum (LGM) differed from the modern ocean state. Depth profiles of ocean sediment pore fluid δ18O and [Cl−] have been used to reconstruct the δ18O and salinity at the LGM. Here, it is investigated whether pore fluid profiles can constrain ocean δ18O and salinity at other times and, simultaneously, their ability to constrain the LGM δ18O and salinity. An inverse framework is developed that relies on Bayesian parameter estimation, thus allowing formal separation of prior assumptions from the information in observations. Synthetic problems are used to explore the information about past ocean tracers that can be recovered from pore fluid profiles. It is concluded that prior knowledge of deep ocean mixing time scales is essential to an accurate inverse estimate of LGM ocean salinity and δ18O from modern pore fluid profiles. The most recent 10 000 years of ocean salinity and δ18O and the error in their estimates are bette...
影响因子：
56.9
作者：
Lamy, F;Kaiser, J;Stoner, J
通讯作者：
Stoner, J