This page is about meteorology, the study of the atmosphere and short term weather forecasting.
Meteorology is subdivided into specialist field concentrating on phenomena at certain length scales . There are different classifications, a simple one is this:
microscale: 20 km
mesoscale: 20 km L 1000 km
synoptic (large) scale: L 1000 km
Forecast validation is an important topic in meteorology, since a huge part of the subject is concerned with prediction more or less extraordinary weather events. For more details, see
Computational meteorology relies heavily on Computational fluid dynamics.
Numerical weather models? are usually grid models?, so that there are usually a lot of important processes that cannot be incorporated into the model directly, because they evolve on a sub-grid scale. Therefore, these processes are approximated by additional parameetrizations, that are influences that act on the model on each grid and depend on a certain set of parameters. For more details, see