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Paper Information

Journal:   PHYSICAL GEOGRAPHY RESEARCH QUARTERLY   SPRING 2014 , Volume 46 , Number 1; Page(s) 21 To 22.
 
Paper: 

CLIMATE OSCILLATION ASSESSMENT BY MERIDIONAL DISPLACEMENT OF SUB TROPICAL HIGH PASSING OVER FARS PROVINCE

 
 
Author(s):  GOLMOHAMMADIAN HADITH*
 
* COLLEGE OF AGRICULTURE, UNIVERSITY OF SHIRAZ
 
Abstract: 

Introduction: According to General Circulation Model (GCM), zonal thermal belts are: 1. Inter- Tropical Convergence Zones (ITCZ) around equator; 2. Sub Tropical High (STH) belt around 30 degree latitude; 3. Sub Polar Low (SPL) belt around high latitudes. Inter- Tropical Convergence Zones belt has meridional migration on the different seasons and its position affects directly the situation of STH. The STH situation is the most important synoptic climatological pattern in Middle East and Iran due to changing season. The belt of Inter Tropical Convergence Zone (ITCZ) displaces in meridional path, about 5o over oceans and up to 40o in continents, during seasons of a year. The position of Sub Tropical High (STH) belt has been also affected by ITCZ movements. STH displacement may change the area covered by westerly Baroclinic Waves (BW) in temperate regions. The Northern Boundary Sub Tropical High (NBSTH) moves coincidently as the northern border of the STH belt. The position of the NBSTH is an important issue for changing precipitation regime and onset of precipitation events in Fars Province. The goal of this research is to determine the position of NBSTH over Fars in monthly scale during the period 1948 - 2010, undertaking its meridional displacement.

 
Keyword(s): CLIMATE OSCILLATION, FARS, MERIDIONAL DISPLACEMENT, NORTHERN BOUNDARY SUB TROPICAL HIGH (NBSTH)
 
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