SYNOPTIC INVESTIGATION OF THE ROLE OF THE SUDANESE LOW PRESSURE SYSTEM DURING WET AND DROUGHT YEARS IN THE SOUTHERN HALF OF IRAN

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PARAK FATEMEH; ROSHANI AHMAD; ALIJANI BOHLOOL

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Journal: GEOGRAPHY AND ENVIRONMENTAL HAZARDS Year:2015 | Volume:4 | Issue:15 Page(s): 19-22

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Title

SYNOPTIC INVESTIGATION OF THE ROLE OF THE SUDANESE LOW PRESSURE SYSTEM DURING WET AND DROUGHT YEARS IN THE SOUTHERN HALF OF IRAN

Author(s)

PARAK FATEMEH | ROSHANI AHMAD | ALIJANI BOHLOOL | Issue Writer Certificate

Keywords

SYNOPTIC INVESTIGATIONQ2

SUDANILOW PRESSUREQ2

WET AND DROUGHT YEARSQ1

SOUTHERN HALF OF IRANQ1

Abstract

1. Introduction: Variability and changes in precipitation amounts, including extreme precipitation and droughts, trigger relevant societal and environmental impacts. Atmospheric circulation strongly determines precipitation variability oversouthern half of Iran. The influence of prevalent synoptic situations on the distribution of precipitation amounts needs to be understood, as well as their frequency changes to appraise the impact of atmospheric circulation on intra- and inter-annual (decadal) fluctuations of precipitation amounts.On the other hand, the atmospheric moisture budget plays important role in the hydrology of this region. The aridity in the southwest and south of Iran is due to subsidence scale caused by Hadley circulation and a location far from oceanic sources of moisture. However the moisture and other properties of atmospheric quantities are transferred by local circulation from another source to the given region. Many investigations have been carried out on this subject. The consideration of the precipitation and its source region of moisture flux over south and southwest of Iran, during 1970-74 has been shown that 23 percent of the total low pressure system which passed over this area are from the southwest of the Red Sea (Faraji, 1982). In the investigation of moisture flux over Iran, which is carried out by Alijani (1995) noted that the Mediterranean Sea is the main source of moisture for precipitation over Iran.Evans, Smith & Oglesby (2004) have shown that the Persian Golf and the Caspian Sea are the main sources of moisture for precipitation over the Alborz and the Zagros mountains. They have shown that the subtropical jet current brings the warm and moist air from the South part of Saudi Arabia and the Aden golf to the Middle East in the middle and higher troposphere (Dayan & Abramski, 1983)...

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APA: Copy

PARAK, FATEMEH, ROSHANI, AHMAD, & ALIJANI, BOHLOOL. (2015). SYNOPTIC INVESTIGATION OF THE ROLE OF THE SUDANESE LOW PRESSURE SYSTEM DURING WET AND DROUGHT YEARS IN THE SOUTHERN HALF OF IRAN. GEOGRAPHY AND ENVIRONMENTAL HAZARDS, 4(15), 19-22. SID. https://sid.ir/paper/356293/en

Vancouver: Copy

PARAK FATEMEH, ROSHANI AHMAD, ALIJANI BOHLOOL. SYNOPTIC INVESTIGATION OF THE ROLE OF THE SUDANESE LOW PRESSURE SYSTEM DURING WET AND DROUGHT YEARS IN THE SOUTHERN HALF OF IRAN. GEOGRAPHY AND ENVIRONMENTAL HAZARDS[Internet]. 2015;4(15):19-22. Available from: https://sid.ir/paper/356293/en

IEEE: Copy

FATEMEH PARAK, AHMAD ROSHANI, and BOHLOOL ALIJANI, “SYNOPTIC INVESTIGATION OF THE ROLE OF THE SUDANESE LOW PRESSURE SYSTEM DURING WET AND DROUGHT YEARS IN THE SOUTHERN HALF OF IRAN,” GEOGRAPHY AND ENVIRONMENTAL HAZARDS, vol. 4, no. 15, pp. 19–22, 2015, [Online]. Available: https://sid.ir/paper/356293/en

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