中文摘要：

溶解氧（DO）的稳定氧同位素组成（δ18ODO）是水生系统DO生物地球化学循环研究的有效示踪剂之一,不同生物地球化学过程引起的氧同位素分馏会反馈到溶解氧同位素组成上。在近年来水生环境中溶解氧同位素研究的基础上,回顾了溶解氧同位素的分馏机理及其影响因素,以及氧同位素的测试技术和海洋环境中溶解氧同位素的应用。在现阶段取得的主要研究进展基础上,提出今后研究及发展趋势应侧重于同位素分析测试技术的提高,特别是高效、快速、连续预处理方法的建立,基础理论研究和关键物理过程在海洋环境溶解氧同位素分布中的作用及其控制机制等方面。

英文摘要：

The stable isotopic composition of dissolved oxygen （δ18ODO） can provide important information about the oxygen cycling in the aquatic systems. Different biogeoehemical processes, including atmospheric O2 dissolution, biological respiration and photosynthesis, play an important role on the isotopic composition of DO. In this paper, we review recent progress of δ18ODO in marine systems, including the oxygen isotopic fractionation during the different bio geochemical processes, the analysis techniques and the applications in various dissolved oxygen studies. Key direc tions for future research include an analytical advance, especially an effective pre-treatment method, theoretical studies of some unknown aspects and a future understanding of the δ18ODO dynamics under the influence of key physical processes.