The usefulness of triple isotope studies of natural systems is contingent on the existence of resolvable differences in mass-dependent fractionation exponents θ [where θ = ln(17/16α)/ln(18/16α)] among processes that are prevalent in the system(s) of interest, or on the existence of resolvable non-mass-dependent fractionation in the system. Both such contingencies are satisfied in continental hydroclimate systems. The process of evaporation of water involves molecular diffusion of water vapor through air, which carries a θ value of 0.5185 (Barkan and Luz 2007) that differs strongly from the value of 0.529 for...

中文翻译：

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流域水，碳酸盐岩和生物磷灰石中的三重氧同位素：对大陆古气候重建的意义

天然系统的三重同位素研究的有用性取决于系统中普遍存在的过程中质量相关的分馏指数θ[其中θ= ln（17 /16α）/ ln（18 /16α）]的可分辨差异的存在。 （s）感兴趣，或系统中存在可解析的非质量依赖的分馏。大陆水文气候系统都满足了这两种情况。水的蒸发过程涉及水蒸气在空气中的分子扩散，其θ值为0.5185（Barkan and Luz 2007），与0.529的θ值有很大差异。