A SYNOPTIC ANALYSIS OF CUT-OFF LOW EFFECTS IN THE EVENT OF SEVERE PRECIPITATIONS OF CENTRAL AND SOUTHWESTERN REGIONS OF IRAN

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OMIDVAR K.; SAFARPOUR F.; MAHMODABADI M.; OLFATI S.

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Journal: Journal of Spatial Planning Year:2011 | Volume:14 | Issue:4 (68) Page(s): 161-189

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Title

A SYNOPTIC ANALYSIS OF CUT-OFF LOW EFFECTS IN THE EVENT OF SEVERE PRECIPITATIONS OF CENTRAL AND SOUTHWESTERN REGIONS OF IRAN

Author(s)

OMIDVAR K. | SAFARPOUR F. | MAHMODABADI M. | OLFATI S. | Issue Writer Certificate

Keywords

SYNOPTIC ANALYSISQ2

CUT-OFF LOWQ2

PRECIPITATIONQ2

CENTRAL REGIONSQ3

SOUTHWESTQ2

IRANQ2

Abstract

This paper investigates the synoptic effects of CUT-OFF LOW in severe PRECIPITATIONs in the SOUTHWESTern and CENTRAL REGIONS of IRAN. At first, five cases of occurrence of cut - off low from the Center of Prediction of Organization of Meteorological Organization were studied and analyzed. For this reason, 21 stations in the SOUTHWESTern and CENTRAL REGIONS were investigated. To analyze this effect, we used daily raining statistics of the stations located in the SOUTHWEST. and center of the country and also the atmosphere maps of the sea surface and the levels of 850, 500 and 300 Hpa. After investigation of their geographical situation, we used weather maps and daily meteorological data of the synoptic stations. Also the instability indexes of Si and Ki for determination of instability degree in Shiraz and Ahwaz stations were investigated. In a 5 day period, synoptic pattern formation and its trends in the weather maps were investigated. The results showed that the main factors of the PRECIPITATION production in the region were the establishment of Siberian high pressure system and the formation of intensive CUT-OFF LOW on the southern Caspian Sea and the central IRAN. At the same time, west instability systems clash with this system, change its way and penetrates in to lower latitude so that the west systems get high level of humidity whenever they transit from the south Seas, penetrate from the SOUTHWEST of the country and make severe PRECIPITATIONs in the SOUTHWESTern and CENTRAL REGIONS of IRAN.

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APA: Copy

OMIDVAR, K., SAFARPOUR, F., MAHMODABADI, M., & OLFATI, S.. (2011). A SYNOPTIC ANALYSIS OF CUT-OFF LOW EFFECTS IN THE EVENT OF SEVERE PRECIPITATIONS OF CENTRAL AND SOUTHWESTERN REGIONS OF IRAN. SPATIAL PLANNING (MODARES HUMAN SCIENCES), 14(4 (68)), 161-189. SID. https://sid.ir/paper/171903/en

Vancouver: Copy

OMIDVAR K., SAFARPOUR F., MAHMODABADI M., OLFATI S.. A SYNOPTIC ANALYSIS OF CUT-OFF LOW EFFECTS IN THE EVENT OF SEVERE PRECIPITATIONS OF CENTRAL AND SOUTHWESTERN REGIONS OF IRAN. SPATIAL PLANNING (MODARES HUMAN SCIENCES)[Internet]. 2011;14(4 (68)):161-189. Available from: https://sid.ir/paper/171903/en

IEEE: Copy

K. OMIDVAR, F. SAFARPOUR, M. MAHMODABADI, and S. OLFATI, “A SYNOPTIC ANALYSIS OF CUT-OFF LOW EFFECTS IN THE EVENT OF SEVERE PRECIPITATIONS OF CENTRAL AND SOUTHWESTERN REGIONS OF IRAN,” SPATIAL PLANNING (MODARES HUMAN SCIENCES), vol. 14, no. 4 (68), pp. 161–189, 2011, [Online]. Available: https://sid.ir/paper/171903/en

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