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

对流层上部急流锋系统对对流层顶逆温层中尺度结构和跨对流层顶输运的影响 [MESO-TIL]

• 批准号: 316739189
• 负责人: Dr. Daniel Kunkel
• 金额: --
• 依托单位: Department Troposphärenforschung (IMK-TRO)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/316739189?language=en
• 关键词: Impact; upper; tropospheric; jet; front

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.

该研究建议专门针对Halo Mission的明智，特别关注对流层顶反演层（TIL）的形成及其对在中尺度上的平流层对流层交换（Ste）的影响。 该项目的基础是斜利生命周期实验中TIL的理想化研究的最新结果。主要目标是在这些理想化的研究中验证对TIL形成的预测，并提高对有助于中尺度上的过程的过程的理解。具体来说，该项目将解决三个科学问题：（1）北大西洋上的截至斜线的变化有多可变，尤其是在受到斜压生命周期和Ste地区强烈影响的地区？ （2）哪些过程对TIL的中尺度变异性有很大贡献？ （3）小型波从TIL和混合层深度上的小平流层中的小规模波的影响有多大？方法的组合将用于回答这些问题。来自ECMWF的分析数据以及Lagrangian方法将用于研究Wise Mission感兴趣的北大西洋上的TIL和Ste。在明智的任务时，将使用新的数值天气预测模型图标进行高分辨率模型模拟。这允许量化在旋风和抗循环流动区域的实际案例研究中对TIL的贡献。此外，将分析模型数据与观察数据结合使用，以研究TIL和小规模波对诱导层的深度的影响。

项目成果

Evidence of small-scale quasi-isentropic mixing in ridges of extratropical baroclinic waves

• DOI: 10.5194/acp-19-12607-2019
• 发表时间: 2019-10
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: D. Kunkel;P. Hoor;T. Kaluza;J. Ungermann;Björn Kluschat;A. Giez;Hans-Christoph Lachnitt;M. Kaufmann;M. Riese

Composite analysis of the tropopause inversion layer in extratropical baroclinic waves

温带斜压波对流层顶逆温层的综合分析

• DOI: 10.5194/acp-19-6621-2019
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Kaluza;Kunkel
• 通讯作者: Kunkel