Examination of the Oceanic Uptake of Anthropogenic CO2 and Other Trace Gases using Multiple Tracer Relationships

全球海洋通量联合研究(JGOFS)和世界海洋环流实验(WOCE)在过去十年的海洋观测中取得的一个主要成果是，我们利用观测来估计海洋人为碳清单的能力有了显著的提高。这一改进既是由于数据的增加，也是由于分析观测的改进技术的发展。海洋一般环流模型的迅速发展发挥了重要作用，这些模型现在被常规用于进行示踪剂模拟和提供人为碳吸收的估计。然而，尽管已经取得了很大的进展，但仍有许多重要的问题需要解决。在这个项目中，普林斯顿大学的研究人员将进行模型敏感性研究，以检验几个模型差异的假设。他们将利用JGOFS和WOCE调查的测量结果来确定哪个模型提供了更真实的模拟，并改进对海洋对人为二氧化碳、炸弹放射性碳和氯氟化碳(氟氯化碳)的吸收和储存的估计。其目标是推动开发可靠的海洋模型和从观测中估计海洋对人为二氧化碳的吸收，目的是改进对海洋碳汇的估计和我们对海洋碳循环的理解。首先，该团队计划检查人为二氧化碳、炸弹14C和氯氟烃的模型模拟示踪剂-示踪剂关系，以评估被认为在确定示踪剂分布方面重要的模型物理方面。然后，他们将尝试通过利用模型模拟结合观测来严格检查将人为二氧化碳从背景总二氧化碳中分离出来的方法，并通过探索使用CFCs、Bomb 14C和CCl4分布的替代方法来改进对人为二氧化碳库存的估计。对这些在历史上相对孤立地进行研究的示踪剂进行协调检查，可以更好地理解海洋模型和真实海洋中的人为二氧化碳、14C炸弹、氯氟化碳和四氯化碳的吸收。

ABSTRACTOCE-0097316A major achievement of the last decade of oceanic observations by the Joint Global Ocean Flux Study (JGOFS) and World Ocean Circulation Experiment (WOCE) has been the dramatic improvement in our ability to use observations to estimate the oceanic inventory of anthropogenic carbon. This improvement has been driven both by increased data and by the development of improved techniques for analyzing the observations. An important role has been played by the rapid development of ocean general circulation models that are now being used routinely to do tracer simulations and provide estimates of anthropogenic carbon uptake. However, despite the great progress that has been made, there remain many important issues that need to be resolved.In this project, researchers at Princeton University will conduct model sensitivity studies to examine several hypotheses for model differences. They would make use of measurements from the JGOFS and WOCE surveys to determine which model gives a more realistic simulation, and to improve estimates of the oceanic uptake and storage of anthropogenic CO2, bomb radiocarbon, and chlorofluorocarbons (CFC). The goal is to advance both the development of reliable ocean models and the estimation of oceanic uptake of anthropogenic CO2 from observations with the aim of improving estimates of the oceanic carbon sink and our understanding of the ocean carbon cycle. First, the team plans to examine model simulated tracer-tracer relationships of anthropogenic CO2, bomb 14C, and CFCs to evaluate aspects of model physics that believed to be important in determining tracer distributions. They will then attempt to improve the estimates of anthropogenic CO2 inventories by making use of the model simulations in conjunction with observations to critically examine ways of separating the anthropogenic CO2 from the background total CO2 and by exploring alternative methods using the distributions of CFCs, bomb 14C, and CCl4. A coordinated examination of these tracers that historically have been examined in relative isolation promises a better understanding anthropogenic CO2, bomb 14 C, CFCs, and CCl4 uptake in ocean models and in the real ocean.