Training course: Advanced numerical methods for earth system modelling

During this presentation, we will discuss two of the questions faced by numerical weather prediction scientists as forecast models reach horizontal resolutions of 6 to 2 km:

• Do we need to abandon the primitive equations for a non-hydrostatic system of equations?
• Do we still need a deep convection parametrisation?
• and we will show what answers to these questions are given by very high resolution simulations of the IFS.

By the end of the presentation, you should be able to:

• discuss the limits of the hydrostatic approximation for numerical weather prediction
• explain the dilemma of parametrizing deep convection versus permitting explicit deep convection at resolution in the grey zone of convection