- 1Meteorological Institute, University of Hamburg, Hamburg, Germany
- 2Leibniz Institute of Atmospheric Physics, University of Rostock, Kühlungsborn, Germany
- 3International Max Planck Research School on Earth System Modeling, Max Planck Institute for Meteorology, Hamburg
One of the main factors characterizing the dynamics of the atmosphere is its vertical density stratification. Gravity waves arising under these conditions play an essential role in large-scale energy transport through upwards propagation and breaking in the middle atmosphere, manifesting in phenomena such as the cold summer mesopause. Moreover, it was recently found that the summer mesopause is also home to the strongly stratified turbulence regime occurring at extremely high buoyancy Reynolds and low horizontal Froude numbers. Direct observation or numerical simulation of these processes with high resolution proves difficult however, due to the remoteness of the region combined with the mesoscale horizontal and small vertical scales that have to be resolved for a detailed analysis of the emerging dynamics.
To deepen our knowledge of the these processes in this region, we employ a combined approach of state-of-the-art radar observations using the MAARSY and SIMONe systems and the physics-informed machine learning method HYPER. The first step and the main topic of the current study is to reconstruct high-resolution 3D wind fields from the line-of-sight measurements in the summer mesosphere. The resulting fields closely capture the observed data and produce high-fidelity, Navier-Stokes-compliant predictions of the surrounding flow beyond measuring points. Building on this, we aim to provide an analysis of the first high-resolution radar observations of strongly stratified turbulence in the middle atmosphere.
How to cite: Peterhans, V. J., Urco, J. M., Avsarkisov, V., and Chau, J. L.: Analysis of Mesoscale Dynamics in the Mesosphere using Radar Observations and Machine Learning, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-6814, https://doi.org/10.5194/egusphere-egu25-6814, 2025.