The project is a cooperation of Leipzig University, Institute for Meteorology, Leipzig, Germany (LIM) and the Department of Atmospheric Physics, Faculty of Mathematics and Physics, Charles University in Prague, Czech Republic (DAP). It is supported by Deutsche Forschungsgemeinschaft under grant JA 836/47-1 during 2021 – 2023. Project PIs are Prof. Christoph Jacobi (LIM) and Prof. Petr Pisoft (DAP). Project scientists are Dr. Khalil Karami (LIM, b381561), Dr. Petr Sacha (DAP, b381114), and Zuzana Prochazkova, MSc. (DAP, b381585).
The project focuses on the detection, analysis, and modelling of stratospheric gravity wave (GW) hotspots and their effect on middle atmospheric dynamics. We will identify GW hotspots on the basis of observations, reanalysis data and model output by analysing different GW parameters and background conditions. From these analyses, we will deduce possible GW sources as well as meteorological conditions that favour the generation of GW hotspots. Based on the results from the datasets partly covering several decades, we will also investigate the temporal development of the GW hotspots to investigate in how far the GW hotspot activity has changed during the last decades.
We perform experiments with UA-ICON model to study the effects of the detected GW hotspots on the dynamics of the atmosphere, up to 100 km of altitude. Based on these results, specific circulation responses, which are induced by the local GW forcing, will be derived.