Stratospheric Influences on the Troposphere

该项目将研究平流层结构和环流的变化如何影响对流层环流，进而影响地表气候。该项目的主要重点是研究对流层的动力学是否对平流层的动力学和热结构具有敏感性。最初将考虑三种可能的机制：(1)向上传播的行星尺度罗斯比波的反向反射；(2)非垂直传播波的远程相互作用，例如在斜压不稳定的经典处理中发现的那些波；(3)通过“向下控制”原理的经向环流。每一个都将在简化的过程模型中单独考虑，并通过三维建模共同考虑。更广泛的影响：这项工作将通过提高我们对对流层和平流层相互作用方式的理解，使模式参数化得到改进，从而使气候模拟界受益。该项目将资助一名学生。

This project will address how changes in the structure and circulation of the stratosphere may impact on the troposphere circulation, and by extension, surface climate. The main focus of the project is to investigate if the dynamics of the troposphere has a sensitivity to the dynamical and thermal structure of the stratosphere. Three possible mechanisms will be considered initially: (1) the backward reflection of upward propagating planetary-scale Rossby waves; (2) the remote interaction for non-vertically-propagating waves such as those that are found in classical treatments of baroclinic instability, and (3) the meridional circulation via the "downward control" principle. Each of these will be considered separately in simplified process models, and collectively through three-dimensional modeling.Broader Impacts: This work will benefit the climate modeling community by improving our understanding of the way in which the troposphere and stratosphere interact, enabling improved model parameterization. One student will be supported by this project.