Annual and Interannual Variabilities in the Kinematics and Dynamics of the Polar Stratosphere

准确地表示春季极地平流层的动力学对于预测臭氧消耗的程度及其对低纬度地区的影响是至关重要的，然而一般环流模式（GCMs）通常不能很好地处理气象学的这一方面，从而不能成功地将动力学和化学结合起来。该奖项下的研究将探索一些关键的，尚未被很好地理解的，涉及的动态过程。这些结果将最终导致gcm中动力学-光化学耦合的改善。联合主要研究人员计划对极地平流层气象条件的季节和年际变化进行观测和理论研究，重点是了解极地最终变暖的动态。水平混合和扩散以及波活动的演化将在准拉格朗日视角的应用中进行研究，该视角最初是由Nakamura博士开发的。共同研究人员将采用几种网格化同化分析作为观测研究的基础，并使用理想模型的层次进行数值实验。他们还计划比较和对比北极和南极变暖的演变过程。

Accurately representing the dynamics of the springtime polar stratosphere is crucial for predicting the extent of ozone depletion and its influence over lower latitudes, yet general circulation models (GCMs) typically do not handle this aspect of the meteorology well enough to allow for a successful coupling of dynamics and chemistry. The research under this award will explore some of the key, and as yet not well understood, dynamical processes that are involved. The results should ultimately lead to improvement of dynamics-photochemistry coupling in GCMs. The co-principal investigators plan to carry out observational and theoretical investigations of the seasonal and interannual variability of the meteorological conditions of the polar stratosphere, focusing on understanding the dynamics of the final warming over the poles. Horizontal mixing and diffusivity and the evolution of wave activity will be examined in an application of the quasi-Lagrangian perspective originally developed by Dr. Nakamura . The co-investigators will employ several gridded assimilated analyses as the basis for the observational studies and also conduct numerical experiments with a hierarchy of idealized models. They also plan to compare and contrast the evolution of the warming as it occurs in the Arctic and Antarctic.