Carbon Dioxide and Water Vapor Isotopes in the Atmospheric Boundary Layer

这个项目是研究水蒸气和二氧化碳的稳定同位素在大气边界层中的传输和扩散。感兴趣的同位素物种为18O-CO2、18O-H2O和13C-CO2。这些同位素为了解陆地上的碳通量和水通量提供了强有力的见解。这项研究将探索这些同位素的当地大气预算与陆地风循环的联系程度。将要采用的主要方法是与陆面过程的同位素参数化动态耦合的大涡模拟(LES)模式。大涡模拟将被用来量化地面和卷吸同位素通量与大气边界层中湍流运动的关系。LES计算和同位素参数化将根据在大豆生态系统和上中西部一座高塔上获得的新数据集进行验证。研究人员计划执行几项任务，以促进他们的结果的使用。根据LES结果制作的动画电影将被整合到首席研究员的边界层气象学研究生课程中，并在耶鲁大学的网站和YouTube上向公众提供。一名博士后研究员和一名博士生将接受最先进的ABL建模技术培训。将向公众提供同位素-LES模型算法和用于模型开发的数据集。

This project is a study of the transport and dispersion of the stable isotopes of water vapor and carbon dioxide in the atmospheric boundary layer (ABL). The isotopic species of interest are 18O-CO2, 18O-H2O and 13C-CO2. These isotopes offer powerful insights into the carbon and water fluxes on land. This study will explore the extent to which the local atmospheric budgets of these isotopes are linked to wind circulation on land. The primary method to be deployed is a large eddy simulation (LES) model that is dynamically coupled with the isotopic parameterization of land surface processes. LES simulations will be conducted to quantify the relationships of the surface and the entrainment isotopic fluxes to turbulent motion in the ABL. The LES calculations and the isotopic parameterization will be validated against new datasets obtained in a soybean ecosystem and on a tall tower in the Upper Midwest.The investigators plan several tasks to facilitate use of their results. Animation movies made of the LES results will be integrated into the principal investigator's graduate course on boundary layer meteorology and made available to the public on a Yale website and on YouTube. A post-doctoral fellow and a PhD student will be trained on the state of the art ABL modeling techniques. The isotope-LES model algorithm and the datasets used for model development will be made available to the public.