Collaborative Research: Kinematics of the Tropopause

这是与哥伦比亚大学的Polvani博士（ATM-9970660）的合作项目。 主要研究人员将研究示踪剂穿过对流层顶的运动学输送，以便更好地了解平流层和对流层之间的耦合。 这项研究的一个关键组成部分将是开发和测试一种数值方案，即所谓的“地面平流”技术。 这种技术是“等值线平流”的直接延伸，“等值线平流”是一种自动跟踪技术，已被PI和其他人成功地用于检查准水平表面上大气传输的精细尺度结构。 新的计划将允许可视化和量化的整个表面，因为它们在三维空间中的演变。 使用这种新技术，PI将研究对流层顶褶皱，目的是估计这些事件期间平流层和对流层之间的传输。

This is a collaborative project with Dr. Polvani of Columbia University (ATM-9970660). The principal investigators (PIs) will examine the kinematic transport of tracers across the tropopause in order to better understand the coupling between the stratosphere and troposphere. A key component of the study will be the development and testing of a numerical scheme, the so-called "surface advection" technique. This technique is a direct extension of "contour advection", a trajectory-following technique which has been used successfully by the PIs and others in examining the fine scale structure of atmospheric transport on quasi-horizontal surfaces. The new scheme will allow for the visualization and quantification of whole surfaces as they evolve in three-dimensional space. Using this new technique, the PIs will study tropopause folds with the goal of estimating the transport between the stratosphere and troposphere during these events.