Volume 7, Issue 3 (fall 2003)
2003, 7(3): 1-12 |
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M. J. Nazemosadat, A. R. Ghasemi. Six-cold-month Precipitation over Southwestern and Central Iran and its Relation to E1 Ninio Southern Oscillation. Journal of Crop Production and Processing 2003; 7 (3) :1-12
URL: http://jcpp.iut.ac.ir/article-1-440-en.html
URL: http://jcpp.iut.ac.ir/article-1-440-en.html
Abstract: (26143 Views)
The present study evaluates the influence of the El Ninio Southern Oscillation (ENSO) phenomenon on the cold season precipitation over Isfahan, Fars, Khuzestan, Chaharmahal-Bakhtyari, Bushehr and Kohgiluyeh-Boyerahmad provinces.
The results indicate that the occurrence of La Nina events caused a 20% to 50% reduction in precipitation over Bushehr, Chaharmahal-Bakhtyari and southern Fars. The cold event did not change the total precipitation over the other parts of the region. In contrast to La Nina episodes, the occurrence of El Ninio events caused a 20% to 70% increase in rainfall in most of the study area. While the most highly wet conditions are related to the El Ninio events, the occurrence probability of the severe droughts has found to be low during such events. In association with La Nina events, the occurrence probability of severe drought was found to be low. Only in Khuzestan and southern parts of the Fars Provinces, this probability has increased to about 0.5.
Keywords: Precipitation, Six-cold-month, Isfahan, Fars, Khuzestan, Chaharmahal-Bakhtyari, Bushehr, Kohgiluyeh-Boyerahmad, El Ninio southern oscillation.
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