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.

我们将使用不同的氧气氧气二氧化碳二氧化碳（自然，人为）的氧气含量将与∆17O相比，我们将使用不同的二氧化碳二氧化碳（自然，人为）。土壤和人类呼吸的二氧化碳分别是limekiln和爆炸炉操作，以确定17o/16o和16o分馏二氧化碳和H2O之间的实验。在莱斯叶中，叶子中的g含量为2o，叶子在Δ17OTFL上的叶子中，将使用二氧化碳和平流层的二氧化碳的交换。