Atmosphere Contents

6. Secondary Circulation

The middle latitudes is a transition zone marked by weather fronts

Areas where surface temperatures and moisture characteristics vary considerably do not typically generate air masses. Instead, the middle latitude region is a transition zone marked by weather fronts and the movement of air masses with different physical properties. A front is the boundary between two air masses of contrasting temperatures and therefore different densities. Fronts can be stationary, cold, warm or occluded (where a cold front catches up and overtakes a warm front).

Weather fronts

What are weather fronts?