ACINN Graduate Seminar - SS 2026

2026-04-15 at 12:00 (on-line and on-site) in the seminar room

Using PMAP to address challenges and gain insights in decametre-scale LES

Nicolai Krieger

ETH, Zurich, Switzerland

 

Advances in high-performance computing have enabled numerical simulations of real-world atmospheric conditions at hecto- and decameter grid spacings, which explicitly resolve the largest turbulent eddies in the boundary layer. However, performing such large-eddy simulations (LES) poses several challenges. This talk introduces the Portable Model for multi-scale Atmospheric Prediction (PMAP), a flexible numerical modelling tool designed to perform such extreme-resolution atmospheric simulations on the latest supercomputing architectures with GPU accelerators.  Specifically in this talk, we discuss the PMAP approach and results while highlighting: (i) the model's capabilities and strengths across km-scale to decameter-scale resolutions, (ii) a novel, effective turbulence generation method in nested LES of real weather, and (iii) insights from idealized and real-data simulations of a local Alpine windstorm in a narrow and deep valley in north-eastern Switzerland.

 

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