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| Trace gas transport on global and regional scales in the light of a new model system: mixing and mixing lines at the polar front | |
| 项目编号 | http://gepris.dfg.de/gepris/projekt/227719076 |
| Professor Dr. PeterHoor (Applicant) | |
| 项目主持机构 | Johannes Gutenberg-Universität Mainz |
| 开始日期 | 2012 |
| 结束日期 | 2015 |
| 英文摘要 | The goal of this project is to improve our detailed understanding of mixing and transport at the extratropical tropopause in the region of extratropical cyclones and the polar jet. For this purpose we will use a newly developed model system, which consistently combines the resolution of a regional model with the dynamical and chemical setup only available in a global model. Transport and mixing in the extratropical tropopause region play a key role for the understanding of ozone and water vapour, which affect the radiation budget of the atmosphere. Global Chemistry Climate Models (CCM's) allow to simulate the overall structure of the tropopause region, but are not able to simulate the detailed processes. Satellite and in-situ observations indicate that mixing at the extratropical tropopause lead to the formation of a mixing layer. This layer can be characterized by so-called mixing lines, which indicate irreversible cross tropopause exchange. The spatial and temporal scales of the underlying dynamical processes, which lead to the formation of mixing lines are only poorly understood. For the composition of the extratropical tropopause region and therefore the formation of mixing lines the polar jet as well as extratropical cyclones play a crucial role. The latter allow a rapid vertical transport of substances into the upper troposphere and long range transport. In the eroding stage of their development complex dynamical processes determine mixing and the fate of the transported substances within the troposphere as well as in the tropopause region. The newly developed model system MECO(n) couples a mesoscale atmospheric chemistry model with a global atmospheric chemistry model. The system allows in particular the consistent simulation of the dynamical and chemical processes in different resolutions within MECO(n). Therefore it is possible to investigate temporal and spatial scales of the dynamical and chemical processes with high resolution and quantify the differences to the lower resolution global model. |
| 学科分类 | 0805 - 大气科学;08 - 地球科学 |
| 资助机构 | DE-DFG |
| 项目类型 | Research Grants |
| URL | http://gepris.dfg.de/gepris/projekt/227719076 |
| 国家 | DE |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/70930 |
| 推荐引用方式 GB/T 7714 | Professor Dr. PeterHoor .Trace gas transport on global and regional scales in the light of a new model system: mixing and mixing lines at the polar front.2012. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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