Collaborative Research: Kinematics of the Tropopause

这是与哥伦比亚大学Polvani博士的合作项目（ATM-9970660）。为了更好地理解平流层和对流层之间的耦合，主要研究人员（pi）将研究示踪剂在对流层顶的运动输送。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“表面平流”技术。这种技术是“等高线平流”的直接扩展，“等高线平流”是一种轨迹跟踪技术，已被pi和其他人成功地用于研究准水平表面上大气输送的精细尺度结构。新方案将允许可视化和量化整个表面，因为它们在三维空间中演变。利用这种新技术，pi将研究对流层顶褶皱，目的是估计在这些事件中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.