Synoptic analysis of monthly and seasonal precipitation in Fars Province during 1982-2005 period

In present research two databases were created, and the mean monthly precipitation was studied for period of 1982-2005 at 500 hp and the surface pressure of 0-60 N latitudes and 0-60 E longitudes. By using of interpolation method (Kriging), the monthly precipitation maps were created and then were plotted after evaluating. The maps were evaluated in relation to the atmospheric systems and mean monthly maps of upper atmospheric surfaces and earth surface. Results indicate that precipitation in Fars Province season affected the high pressure in upper atmosphere in warm and the low pressure at earth surface causes rainfall. In cold season the situation was reversed as by the precipitation increase in cold season this is because the low pressure systems dominated the earth surface and upper atmosphere. In general, the systems of 500 hp and sea level and westerly waves and Sudani low pressure at earth surface had the triggering action rainfall in Fars Province.