Collaborative Research: Atmospheric Wave and Vortex Dynamics

小行星9527315 该项目是哥伦比亚大学的Lorenzo Polvani博士（在该奖项下）和麻省理工学院的Alan Plumb博士（ATM-9528471）之间就非线性大气波和涡旋的动力学进行的一项持续合作，特别侧重于平流层的应用。 在这项工作中，使用了一些工具。 最初，轮廓动力学的技术被用来研究，在非常高的分辨率，在各种情况下的Rossby波破碎的特性。 然后，主要研究人员使用一个全球性的、伪谱的浅水模型来研究存在非保守过程的非线性波浪的二维动力学，以及一种“轮廓平流”技术（一种拉格朗日、高分辨率、轮廓跟踪方法，用于描述已知流动中的运输）。 为了扩展这些结果，PI将使用多层，伪谱，原始方程模型来研究Rossby波和平流层极涡之间相互作用的三维方面。 他们还将研究与Rossby波动力学相关的对流层环流的各个方面-包括大气阻塞以及Hadley环流和中纬度行星波之间的相互作用。 ***

9527315 Polvani This project represents an ongoing collaboration between Drs. Lorenzo Polvani of Columbia University (under this award) and Dr. Alan Plumb of MIT (ATM-9528471) concerning the dynamics of nonlinear atmospheric waves and vortices, with particular emphasis on applications to the stratosphere. In this work, a number of tools have been employed. Initially, the techniques of contour dynamics was used to study, at very high resolution, the characteristics of Rossby wave breaking under a variety of circumstances. The principal investigators then used a global, pseudospectral, shallow water model to look at the two-dimensional dynamics of nonlinear waves in the presence of nonconservative processes as well as a "contour advection" technique (a Lagrangian, high resolution, contour-following approach to depict transport in known flows. To extend these results, the PIs will examine the three-dimensional aspects of the interaction between Rossby waves and the stratospheric polar vortex using a multi-layer, pseudospectral, primitive equation model. They also will investigate various aspects of the tropospheric circulation related to Rossby wave dynamics - including atmospheric blocking and interactions between the Hadley circulation and midlatitude planetary waves. ***