RAINFALLS RANKING OF WESTERN IRAN BASED ON ORIGINS OF PRECIPITABLE CYCLONES

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BARATI GH.; HEYDARI I.

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Journal: Researches in Earth Sciences Year:2010 | Volume:1 | Issue:2 Page(s): 61-71

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Title

RAINFALLS RANKING OF WESTERN IRAN BASED ON ORIGINS OF PRECIPITABLE CYCLONES

Author(s)

BARATI GH. | HEYDARI I. | Issue Writer Certificate

Keywords

HEAVY RAINQ3

PRECIPITABLE LOWQ3

WESTERN IRANQ2

Abstract

Average precipitation of Iran is less than one forth in comparison with its global average. Because of the sensitivity of soil and water resources in WESTERN IRAN as a relatively humid and mountainous region, the recognizing of Precipitable Pressure Systems (PPSs) is necessary. In this study firstly, we extracted 12 Monthly HEAVY RAINfalls (MHRs) based on the daily rainfall data of 11 weather stations in WESTERN IRAN and secondly, we analyzed daily weather maps at two levels including sea and 500 HPA for designing of monthly, quarterly and annual synoptic models. The results showed that most PPSs in WESTERN IRAN originated from Mediterranean Sea. It was presented that Red Sea dispatched less PPSs during summer (zero percent) than spring (48 percent) towards the study area. The spring time of Red Sea correspond with the Mediterranean Sea ones. Also based on synoptic patterns, we found PPSs routes had slow regression from 20 degrees latitudes to North during spring and quick advance from North to 60 degrees latitudes during the autumn. It can explain the high frequency of PPSs during spring that was dispatched from Red Sea with its vertical shape. It may be causes the increasing share of PPSs dispatching from Red Sea toward WESTERN IRAN during spring in comparison with its autumn one. Therefore, Mediterranean, Red and Black Seas as huge water bodies respectively dispatched PPSs towards WESTERN IRAN.

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APA: Copy

BARATI, GH., & HEYDARI, I.. (2010). RAINFALLS RANKING OF WESTERN IRAN BASED ON ORIGINS OF PRECIPITABLE CYCLONES. RESEARCHES IN EARTH SCIENCES, 1(2), 61-71. SID. https://sid.ir/paper/207320/en

Vancouver: Copy

BARATI GH., HEYDARI I.. RAINFALLS RANKING OF WESTERN IRAN BASED ON ORIGINS OF PRECIPITABLE CYCLONES. RESEARCHES IN EARTH SCIENCES[Internet]. 2010;1(2):61-71. Available from: https://sid.ir/paper/207320/en

IEEE: Copy

GH. BARATI, and I. HEYDARI, “RAINFALLS RANKING OF WESTERN IRAN BASED ON ORIGINS OF PRECIPITABLE CYCLONES,” RESEARCHES IN EARTH SCIENCES, vol. 1, no. 2, pp. 61–71, 2010, [Online]. Available: https://sid.ir/paper/207320/en

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