Study of Arctic Oscillation Effect on Temperature and Precipitation Fluctuations at Winter in Central Iran

Subject Areas : Geopolitic

K.  Omidvar ¹ (-)
M.  Jafarinadoshan ² (-)

Received: 2015-10-05 Accepted : 2015-10-05 Published : 2014-04-21

Keywords: Tele-connection, Arctic Oscillation (AO), temperature, Precipitation, Central Iran,

Abstract :

Aim of this research is to predict the fluctuations of winter (December-March) temperature and precipitation in central Iran using Tele-connection patterns. The applied data is included the Arctic Oscillation index and daily temperature (minimum , maximum and average) and precipitation values during 45 years ( 1965-2010) in 9 stations in central Iran. After averaging the data, seasonal time series was made separately for each variable.  The results of the correlation test revealed that winter temperature is decreased in central Iran in positive phase of Arctic Oscillation. Also, it was cleared that AO variations in autumn justify 25% of winter temperature variations in the under studying zone. Because of lack of significant correlation coefficients in the most under studying stations, we can conclude that there is not any relationship between Arctic Oscillation and winter precipitation in central Iran.