Numerical modelling

The ability of Numerical Weather Prediction (NWP) and climate models to accurately represent Arctic cyclones, tropopause polar vortices, and their interactions with cloud microphysics and surface heterogeneities will be assessed.

  • Regional models will be used: The AROME-Arctic model with 2.5 km resolution centered over Svalbard and north of Norway used by the Norwegian Meteorological institute (MET Norway) for numerical weather prediction, is a configuration of the ALADIN-HIRLAM cooperation. A Météo-France version of the model with a different cloud microphysics package will be used as well. Polar WRF is an optimized version of the state-of-the-art WRF mesoscale model.
  • Global models will be used: One is the Météo-France global forecast model ARPEGE (T1798 resolution with full physics and 105 vertical levels, stretched horizontal grid). The other model is LMDZ, the atmospheric component of the Institut Pierre Simon Laplace – Coupled Model