FORMATION OF HEAVY PRECIPITATIONS IN SOUTHWESTERN PART OF IRAN AND ITS ASSOCIATION WITH THE MADDEN-JULIAN OSCILLATION

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NAZEMOSADAT S.M.J.; SHAHGHOLIAN K.

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Journal: Journal of Water and Soil Year:2014 | Volume:28 | Issue:5 Page(s): 1072-1083

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Title

FORMATION OF HEAVY PRECIPITATIONS IN SOUTHWESTERN PART OF IRAN AND ITS ASSOCIATION WITH THE MADDEN-JULIAN OSCILLATION

Author(s)

NAZEMOSADAT S.M.J. | SHAHGHOLIAN K. | Issue Writer Certificate

Keywords

IRANQ3

MJOQ2

PERSIAN GULFQ2

PRECIPITATIONQ2

VECTOR WINDSQ2

Abstract

The aim of this study is to assess some synoptic characteristics of heavy PRECIPITATIONs in southwestern parts of IRAN and evaluate the relationship between them with the Madden-Julian Oscillation (MJO). Research is conducted with regard to distribution of PRECIPITATION per month and identifying their steam sources. Daily records of the November-April PRECIPITATION data in Abadan, Ahwaz, Bandar-Abbas, Bushehr, Shahr-e-kord and Shiraz stations for the 1975- 2011 period are collected as well as same panel data for Yasuj station from 1990 to2011. Rainfall data are sorted in descending order and PRECIPITATION values that were fallen within the 5% and10% of highest records are categorized as the heavy PRECIPITATION. The most frequent PRECIPITATIONs occurred in January, February and December. The most frequent heavy PRECIPITATIONs in Ahwaz, Bandar-Abbas, Bushehr, Shahr-e-kord and Shiraz stations occurred in phase 8, while in Abadan station occurred in phases 7 and 8. Apparently, due to the short duration PRECIPITATIONs data at Yasuj station, the most frequent heavy PRECIPITATION observed in phase 2.Synoptic maps show that harmonized with eastward movement of convective PRECIPITATIONin Indian or pacific oceans.Heavy PRECIPITATION forms in the west region of IRAN and moves toward southwest and south Central of IRAN and then appears to Afghanistan. Formation of a cyclonic circulation that encompasses the Mediterranean Sea, Red Sea and PERSIAN GULF plays an important role for moisture supplement of these storm activities. The synoptic maps have indicated that main sources of these heavy rainfalls are moisture produced at the Arab sea and western parts of the Indian Ocean.

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APA: Copy

NAZEMOSADAT, S.M.J., & SHAHGHOLIAN, K.. (2014). FORMATION OF HEAVY PRECIPITATIONS IN SOUTHWESTERN PART OF IRAN AND ITS ASSOCIATION WITH THE MADDEN-JULIAN OSCILLATION. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 28(5), 1072-1083. SID. https://sid.ir/paper/141125/en

Vancouver: Copy

NAZEMOSADAT S.M.J., SHAHGHOLIAN K.. FORMATION OF HEAVY PRECIPITATIONS IN SOUTHWESTERN PART OF IRAN AND ITS ASSOCIATION WITH THE MADDEN-JULIAN OSCILLATION. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2014;28(5):1072-1083. Available from: https://sid.ir/paper/141125/en

IEEE: Copy

S.M.J. NAZEMOSADAT, and K. SHAHGHOLIAN, “FORMATION OF HEAVY PRECIPITATIONS IN SOUTHWESTERN PART OF IRAN AND ITS ASSOCIATION WITH THE MADDEN-JULIAN OSCILLATION,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 28, no. 5, pp. 1072–1083, 2014, [Online]. Available: https://sid.ir/paper/141125/en

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