Impact of upper tropospheric jet-front systems on the mesoscale structure of the tropopause inversion layer and cross-tropopause transport [MESO-TIL]

这项研究建议专门针对HALO使命WISE，特别侧重于对流层顶逆温层的形成及其对中尺度平流层对流层交换的影响。 这个项目的基础是最近的结果，从理想化的研究中的TIL在斜压生命周期实验。主要目标是验证这些理想化研究中TIL形成的预测，以及提高对中尺度STE过程的理解。具体而言，三个科学问题将在这个项目中解决：（1）如何变量是在北大西洋，特别是在强烈影响的斜压生命周期的地区和地区的STE的TIL？(2)哪些过程对TIL的中尺度变率贡献最大？(3)来自平流层下部急流锋系统的小尺度波对TIL和混合层深度的影响有多大？将使用多种方法来回答这些问题。ECMWF的分析数据沿着拉格朗日方法将被应用于研究北大西洋的TIL和STE，这是WISE使命的兴趣区域。在执行WISE使命期间，将使用新的数值天气预报模式ICON进行高分辨率模式模拟。这允许量化有多少个人的过程有助于在真实的案例研究中的气旋和反气旋流的区域的TIL。此外，还将结合观测资料对模式资料进行分析，以研究TIL和小尺度波对对流层外混合层深度的影响。

This research proposal is dedicated to the HALO mission WISE, with a special focus on the formation of the tropopause inversion layer (TIL) and its impact on stratosphere troposphere exchange (STE) on the mesoscale. The basis for this project are recent results from idealized studies of the TIL in baroclinic life cycle experiments. Major goals are to verify predictions of the TIL formation in these idealized studies as well as to improve the understanding of processes that contribute to STE on the mesoscale. Specifically, three scientific question will be addressed in this project: (1) How variable is the TIL over the North Atlantic, especially in regions strongly influenced by baroclinic lifecycles and in regions of STE? (2) Which processes contribute most to the mesoscale variability of the TIL? (3) How large is the impact of small scale waves from the jet-front system in the lower stratosphere on the TIL and on the depth of the mixing layer? A combination of methods will be used to answer these questions. Analysis data from the ECMWF along with Lagrangian methods will be applied to study the TIL and STE over the North Atlantic which is the region of interest of the WISE mission. For the time of the WISE mission high resolution model simulations will be conducted with the new numerical weather prediction model ICON. This allows to quantify how much individual processes contribute to the TIL in real case studies in regions of cyclonic and anti-cyclonic flow. Moreover, the model data will be analyzed in combination with observational data to study the impact of the TIL and of small scale waves on the depth of the extratropical mixing layer.