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Progress in paleosalinity: Overview and presentation of a new approach

机译:古碱度研究进展:一种新方法的概述和介绍

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This paper concerns the use of stable oxygen isotope ratios ( delta O-18) and stable hydrogen isotope ratios ( delta H-2 or delta D) to derive paleosalinity. First, I evaluate the potential and limitations of existing methods based on delta O-18 and delta D separately. Next, I propose a new theoretical framework for the combined use of delta O-18 and delta D to constrain the impact of the hydrological cycle on the surface waters and to thus characterize changes in surface water salinity. This new method is accompanied by an error propagation exercise to demonstrate its limitations and areas of potential improvement. A feasible strategy is outlined for achieving reconstructions of paleosalinity change with an uncertainty of 1 practical salinity unit or less with the newly proposed method ( especially in regions with high deuterium excess values).
机译:本文涉及使用稳定的氧同位素比率(δO-18)和稳定的氢同位素比率(δH-2或δD)来得出古碱度。首先,我分别评估基于增量O-18和增量D的现有方法的潜力和局限性。接下来,我提出了一个新的理论框架,可以结合使用O-18和D来限制水文循环对地表水的影响,从而表征地表水盐度的变化。此新方法伴随着错误传播练习,以证明其局限性和潜在的改进领域。概述了一种可行的策略,可以通过新提出的方法实现古盐度变化的重建,不确定性为1个实际盐度单位或更小(特别是在氘过量值较高的地区)。

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