Identify Tele-connection Patterns affecting on Rainfall in Karoon Basin

The Tele-connection patterns are the major constituents of climate at global and regional scale(s). The Karoon Basin is of a vital stance in providing natural water supply and hydroelectric; this basin is facing major fluctuations in rainfall regime. Identifying the effect of Tele-connection on great Karoon Basin rainfall regime is the subject of this study. To accomplish this objective the seasonal-annual rainfall volumes recorded at stations related to this basin are assessed for the period of (1956-2012) through 12 Tele-connection patterns. The method applied here is the data analysis through correlation statistical techniques and analysis of the main climatic components. In this basin, 49.7% of precipitation is of the winter followed by autumn with 34.9% and spring with 14.9%. The findings of the analysis indicate that the precipitation in autumn is influenced mostly by NINO4, NINO1, NINO3.4 and SOI patterns. The analysis of winter and spring precipitation reveals the influence of SCAN phase on both these seasons. The precipitations of the basin do have a harmonized change pattern with Tele-connection pattern by addressing the delay time. It is deduced that these indicators can contribute to moist and dry cycle’s occurrence when the planning regarding this basin is of concern.