As the Sun's position changes during the course of the year, the regional heat balance of the atmosphere also changes. This influences the position of pressure centers and large-scale wind patterns, as well as evaporation and the content of water vapor in the atmosphere. In some regions this is the cause of seasonally contrasting precipitation conditions (e.g., monsoon, semihumid tropics, and subtropics).
Where several factors influencing precipitation occur in conjunction in a region, special - sometimes extreme -precipitation conditions can arise (see also Table 1).
Was this article helpful?