The WRF model (weather research and forecasting) is a detailed 3-D model of the weather that represents wind speed, pressure, density, temperature and humidity at different levels. Input to the model include initial fields of these parameters from a global database (e.g. the CFSR database of global weather on a 30’ grid); the same data on the boundaries of the model throughout the simulation period; data on vegetation, land roughness and thermal capacity; data on input of solar energy.
Aktis usually constructs initial model on a resolution of 27 km with 36 atmospheric layers, refining this in nested areas by a factor 3 in the horizontal dimensions until the required resolution is achieved. (usually 3km or even 1 km). The maximum allowable time-step also decreases with model resolution.
Aktis is experienced at applying the model and making comparisons with local measurements to ensure that the results are sensible.