Analysis of relationship between north atlantic oscillations(NAO) and arctic oscillations(AO)with annual precipitation and tempereture of Lorestan province and its synoptically analysis

North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) is an effective patterns of climate variability in general circulation area outside the hemisphere Tropical North. And is the main cause of climate control elements such as temperature and precipitation, which are great social and economic effects on the part energy, agriculture, industry, transport and health. In the present study was evaluated the effect of the phenomenon Arctic Oscillation and North Atlantic Oscillation on precipitation and temperature in Lorestan province. Was used for this purpose, the numerical values of NAO index as an indicator of pressure to explain variation in North Atlantic Ocean, AO index numeric values as indicators explain changes in the Arctic pressure and temperature and precipitation values of synoptic stations located in Lorestan province (Khorram Abad, Aligudarz, Boroujerd and Kuhdasht) during long-term statistics. ¬ is the main method used in this study using analytic statistics (Pearson and Spearman correlation coefficient and principal component analysis and linear trend of polynomial). Also evaluated Map of synoptic sea level and 500 level to justify HP rainfall in the region during the phases of positive and negative index NAO. The results showed that the inverse relationship between precipitation and temperature is the region of NAO index and the AO. So that the concurrent positive phase of NAO and AO index with periods of reduced precipitation and temperature, and negative phase index mentioned period of increased precipitation and temperature in the area. The study showed, which was higher in the study area, has the effect of NAO pattern and special pattern of AO on the temperature parameter, especially in winter. Given that the correlation coefficients obtained are to be ¬ suggest a weak correlation between precipitation and temperature region of NAO index and the AO. is possible that precipitation and temperature region than the region and the role of topoklimai affect the adjacent neighbors. Map of the study results indicate that the pressure during the negative phase North Atlantic Oscillation index, weakened Icelandic low pressure and high pressure Azour and consequently a stronger thermal Prfsharhay width increased rainfall in the northern region during the phase positive North Atlantic Oscillation index, a stronger low pressure and high pressure Azour Iceland and consequently become weak high pressure northern latitude temperature decreased rainfall in the region .