Synoptic Classification of Effective Circulation Patterns on the Climate of Iran in Sea Level

Classifications are an important tool in both general and applied climatology. The derivation and application of classifications have considerably increased in the climate research during the last decades، but already in earlier times of scientific evolution، we can find prominent and long-lived examples like the well-known global climate classification. This classification was based on threshold climatically regarding temperature and precipitation. Unlike the threshold classification for applying classification by multivariate analysis the condition of classification should be done without considering objective threshold and base on the self-definitions. In This paper have been classified the sea level pressure and for achieving the most important circulation pattern on the sea level pressure on the climate of Iran. In Iran amply has studied about effective circulation pattern over Iran climatology.