Remote communication link patterns on the water cycle in the atmosphere in Iran

This research is trying to assess the hydrological cycle and its trend in Iran. It is also tried to study the effect of NAO, AISMR and ONI Tele-connection pattern on the spatial variability of precipitation in Iran. For this purpose, the precipitation and precipitable water data during the 1979 - 2014 were extracted and analyzed from NCEP / NCAR. Then the hydrologic cycle was calculated on the basis of reproducibility time formula. The maps of this cycle across Iran were drawn. The analysis shows some region like Southwest Caspian Sea, Kermanshah, Lorestan have had the short hydrological cycles (5.5 to 11.5 years) due to the topographic and neighborhood effect. The longest hydrological cycle (98.30 to 141.17-year) have happened in the East and South of Sistan and Baluchestan. In the South East of Iran, AISMR has negative correlation (sig