Carbon Dioxide and Water Vapor Isotopes in the Atmospheric Boundary Layer

该项目是对大气边界层（ABL）中水汽和二氧化碳的稳定同位素的输送和扩散的研究。感兴趣的同位素种类是18 O-CO2、18 O-H2O和13 C-CO2。这些同位素为陆地上的碳和水通量提供了强有力的见解。这项研究将探讨这些同位素在当地大气中的收支与陆地风循环的联系程度。部署的主要方法是一个大涡模拟（LES）模式，是动态耦合的同位素参数化的陆面过程。LES模拟将进行量化的表面和夹带的同位素通量的湍流运动在ABL. LES计算和同位素参数化的关系将验证对新的数据集获得的大豆生态系统和在上中西部的高塔。研究人员计划几个任务，以促进他们的结果的使用。由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建模技术的培训。同位素LES模型算法和用于模型开发的数据集将向公众提供。

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.