RECHERCHE EN PREVISION NUMERIQUE

 

THE COMPARE III EXPERIMENT


 
The Comparison Of Mesoscale Prediction And Research Experiments (COMPARE) project has the objective of proposing and performing numerical experimentation to improve our understanding and enhance our predictive capability of  mesoscale weather phenomena. This exercice draws on high quality datasets obtained from field experiments. The Canadian Atlantic Storms Project (1986) and the PYRenean EXperiement (1990) has provided the first two cases for COMPARE.  The GEM model is a Canadian participant in the third COMPARE exercise which this time is coupled with the TCM-90 field experiment.

The first scientific issue is to detemine how well current numerical models are able to simulate explosive tropical cyclogenesis. The experimental protocol therefore proposes a set of experiments that will examine the sensitivity of the participant's models to the horizontal resolution.

The second scientific issue is to evaluate the sensitivity to perturbations in initial analysis fields. The perturbations may come from different data assimilation systems or from the availability of a synthetic initialization that adds in an otherwise standard analysis a Tropical Cyclone structure.