Identify Tele-connection Patterns affecting on Rainfall in Karoon Basin

Document Type : Research Article

Authors

1 Department of Physical Geography, Faculty of Geography, University of Isfahan, Iran.

2 Assistant Professor, Faculty of Earth Sciences, Shahrekord University, Iran

3 Final year PhD. student in Climatology, Faculty of Geography, University of Isfahan, Isfahan, Iran

Abstract

The Tele-connection patterns are the major constituents of climate at global and regional scale(s). The Karoon Basin is of a vital stance in providing natural water supply and hydroelectric; this basin is facing major fluctuations in rainfall regime. Identifying the effect of Tele-connection on great Karoon Basin rainfall regime is the subject of this study. To accomplish this objective the seasonal-annual rainfall volumes recorded at stations related to this basin are assessed for the period of (1956-2012) through 12 Tele-connection patterns. The method applied here is the data analysis through correlation statistical techniques and analysis of the main climatic components. In this basin, 49.7% of precipitation is of the winter followed by autumn with 34.9% and spring with 14.9%. The findings of the analysis indicate that the precipitation in autumn is influenced mostly by NINO4, NINO1+2, NINO3.4 and SOI patterns. The analysis of winter and spring precipitation reveals the influence of SCAN+ phase on both these seasons. The precipitations of the basin do have a harmonized change pattern with Tele-connection pattern by addressing the delay time. It is deduced that these indicators can contribute to moist and dry cycle’s occurrence when the planning regarding this basin is of concern.
 
 
 

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Volume 3, Issue 1
March 2016
Pages 95-105
  • Receive Date: 21 February 2016
  • Revise Date: 22 August 2016
  • Accept Date: 15 April 2016
  • First Publish Date: 15 April 2016