Paper Information

Journal:   RESEARCH BULLETIN OF ISFAHAN UNIVERSITY (HUMANITIES)   2007 , Volume 22 , Number 1; Page(s) 117 To 132.
 
Paper: 

AN ANALYSIS OF RELATIONSHIP BETWEEN MONTHLY TEMPERATURE OF IRAN AND TELECONNECTION PATTERNS OF NORTHERN HEMISPHERE

 
Author(s):  AKBARI T., MASOUDIAN S.A.A.F.
 
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Abstract: 

The term "teleconnection pattern" refers to a recurring and persistent, large-scale pattern of pressure and circulation anomalies that span vast geographical areas. Teleconnection patterns are also referred to as preferred modes of low-frequency (or long time scale) variability.
Teleconnection patterns reflect large-scale changes in the atmospheric wave and jet stream patterns, and influence temperature, rainfall, storm tracks, and jet stream location/ intensity over vast areas. Thus, they are often the culprit responsible for abnormal weather patterns occurring simultaneously over seemingly vast distances. 14 teleconnection patterns have been recognized in Northern Hemisphere. In this paper we attempt to detect the relationship between monthly temperature of Iran and the teleconnection indicies. we used mean monthly temperature data and monthly index of each teleconnection pattern for the period of 1951 through 2003.teleconnection pattern indices are gathered from the www.cpc.noaa.gov and  temperature data for 338 stations of Iran are gathered from www.irimet.net.
In this paper we used linear regression technique .We regressed each index against the monthly temperature for all 338 stations for each month during the period of record (1951 trough 2003). This study attempts to detect significant relationships for 14 indices using Matlab7, Then the results plotted in geographic in G.I.S environment.
This study showed that none of the indices could explain a great deal of temperature variations of a large member of stations. Meanwhile some indices in some months could explain some part of temperature variations of some stations.

 
Keyword(s): TELECONNECTION PATTERNS, LINEAR REGRESSION TECHNIQUE, RELATIONSHIP BETWEEN TEMPERATURE AND TELECONNECTION PATTERNS
 
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