Triple oxygen isotope variations in natural and anthropogenic carbon dioxide

天然和人为二氧化碳中的三重氧同位素变化

• 批准号: 106026871
• 负责人: Professor Dr. Andreas Pack
• 金额: --
• 依托单位: Abteilung Isotopengeologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/106026871?language=en
• 关键词: Triple; oxygen; isotope; variations; natural

We will use the oxygen triple isotope composition of gaseous CO2 of different provenance as constraint to better understand the CO2 budget in the Earth s troposphere. Different reservoirs (natural, anthropogenic) are expected to have distinctly different (17O/(18O ratios (expressed in form of the ∆17OTFL notation). The ∆17OTFL of tropospheric CO2 will be compared to ∆17O of CO2 from soil and human respiration, combustion of organic matter (fossil & modern), limekiln and blast furnace operation, respectively. Experiments will be conducted to determine the 17O/16O and 18O/16O fractionation between CO2 and H2O. The experiments will be used to study the effect of equilibration of CO2 with H2O (e.g in leaf stomata, soils, oceans) on ∆17OTFL. Results will be used to model the exchange of CO2 between bio-, tropo- and stratosphere, respectively. An integral part of this study is to establish a novel technique for the determination of ∆17OTFL of CO2 with high accuracy and precision.

我们将使用不同来源的气态CO2的氧三重同位素组成作为约束，以更好地了解地球对流层CO2的收支。不同的水库（自然的，人为的）预计有明显不同的（17 O/（18 O）比率（以17 OTFL符号的形式表示）。对流层CO2的170 OTFL将分别与土壤和人类呼吸、有机物燃烧（化石和现代）、石灰窑和高炉操作产生的CO2的170 OTFL进行比较。将进行实验以确定CO2和H2O之间的17 O/16 O和18 O/16 O分馏。这些实验将用于研究CO2与H2O平衡（例如，在叶片气孔、土壤、海洋中）对CO 17 OTFL的影响。结果将分别用于模拟生物层、对流层和平流层之间的二氧化碳交换。本研究的一个组成部分是建立一种新的技术，用于测定CO2的17 OTFL，具有高准确度和精密度。