Study Pressure Fields Affecting Cyclone Rainfall: Case Study of Iran
Affiliation(s)
1 Najafabad Branch, Islamic Azad University, Isfahan, Iran. 2 Uiniversity of Isfahan, Isfahan, Iran. 3 Department of Geography, Najafabad Branch, Islamic Azad University, Isfahan, Iran. 4 Department of Geography, Payam Noor Uiniversity of Tehran, Esfhan, Iran.
1 Najafabad Branch, Islamic Azad University, Isfahan, Iran. 2 Uiniversity of Isfahan, Isfahan, Iran. 3 Department of Geography, Najafabad Branch, Islamic Azad University, Isfahan, Iran. 4 Department of Geography, Payam Noor Uiniversity of Tehran, Esfhan, Iran.
ABSTRACT
The aim of this study is the synoptic analysis of the atmospheric conditions concurrent with the heavy precipitations of Lorestan, Fars and Hormozgan provinces and determination of the temporal and spatial distribution of them. Requested atmospheric data for this research was taken from databases related to the National Organization of Atmosphere and Oceanology of United States. More maps of the site were taken. Then the earth surface, 500,700 and 850 Hecto Pascal maps, orbital and meridional winds, earth temperature of earth surface and top of the atmosphere were prepared in Grads software and some of maps were drawn in GIS software. The following results were obtained: On the earth surface map, the main controller role is with the Siberian high-pressure, the Azores’s dynamic high-pressure and integrated mode of the Sudan and the Mediterranean low-pressure systems. The main controller role in high levels is with the high altitude center of Azores in the back of the system, the high altitude center of Arabia in the front of the system and deep traffic of North Africa. Another important factor is the moisture mixture of Mediterranean Sea, Red Sea, Persian Gulf, Oman Sea and Indian Ocean. Air rise factor with enhancing meridional winds that causes subsidence of cold air, rising warm air and strengthening the polar front is one of the heavy rainfall conditions too. Eastern winds cause entering of moisture from the Indian Ocean and western winds cause strengthening of cyclones and heavy rainfall in the region.
The aim of this study is the synoptic analysis of the atmospheric conditions concurrent with the heavy precipitations of Lorestan, Fars and Hormozgan provinces and determination of the temporal and spatial distribution of them. Requested atmospheric data for this research was taken from databases related to the National Organization of Atmosphere and Oceanology of United States. More maps of the site were taken. Then the earth surface, 500,700 and 850 Hecto Pascal maps, orbital and meridional winds, earth temperature of earth surface and top of the atmosphere were prepared in Grads software and some of maps were drawn in GIS software. The following results were obtained: On the earth surface map, the main controller role is with the Siberian high-pressure, the Azores’s dynamic high-pressure and integrated mode of the Sudan and the Mediterranean low-pressure systems. The main controller role in high levels is with the high altitude center of Azores in the back of the system, the high altitude center of Arabia in the front of the system and deep traffic of North Africa. Another important factor is the moisture mixture of Mediterranean Sea, Red Sea, Persian Gulf, Oman Sea and Indian Ocean. Air rise factor with enhancing meridional winds that causes subsidence of cold air, rising warm air and strengthening the polar front is one of the heavy rainfall conditions too. Eastern winds cause entering of moisture from the Indian Ocean and western winds cause strengthening of cyclones and heavy rainfall in the region.
Cite this paper
Salehvand, I. , Montazeri, M. , Gandomkar, A. , Moemeni, M. and Ataei, H. (2015) Study Pressure Fields Affecting Cyclone Rainfall: Case Study of Iran. Atmospheric and Climate Sciences, 5, 129-136. doi: 10.4236/acs.2015.52010.
Salehvand, I. , Montazeri, M. , Gandomkar, A. , Moemeni, M. and Ataei, H. (2015) Study Pressure Fields Affecting Cyclone Rainfall: Case Study of Iran. Atmospheric and Climate Sciences, 5, 129-136. doi: 10.4236/acs.2015.52010.
References
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[1] Sadeghi, S., Hossins, B.S.R., Friend, R. and Blacksmith, B.-Z. (2012) Synoptic Analysis of Cold Wave in the North East of Iran. Geography and Environmental Hazards, 3, 107-123. [2] Ghaffarian, P., Mshkvaty, A.H., Freedom, M. and Farm Farahani, M. (2010) The Synoptic Precipitation in the North West of Iran, a Case Study Extreme Precipitation Stations in Urmia. Journal of Climatology, 2, 13-24. [3] Mousavi, B. and Ashraf, M.B. (2010) Investigated the Vertical Profile of Rainfall Has Led to Severe Summer Weather (Case Study: Mashhad). Soil and Water Journal, 24, 10-48. [4] Lashkari, H. (2008) Synoptic Analysis of the Causes Precipitation Sylza in Golestan Province. Journal of Human Journal, 12, 181-211. [5] Parandeh, K. (2011) Evaluation of Heavy Rainfall in Southern Iran Synoptic Case Study Due December 1, 1984 to 4 January 1985. Journal of Geography, Planning and Environmental Dalaki River Watershed, 41, 123-136. [6] Noori, H.M.A. (2012) Of Clouds and Heavy Rains Causing Heavy Southern Shores of the Caspian. Geography and Environmental Planning, 47, 1-22. [7] Azizi, Q.A. (2006) Synoptic Analysis of the Spatial Distribution of Extreme Precipitation and North Khorasan Province. Journal of Geographical Perspective, 95, 65-112. [8] Lashkari, H. and Kay, G. (1389) Synoptic Analysis Gvnv Storm and Its Effects on South-East of Iran. Journal of Geography and Environmental Planning, 21, 1-20. [9] Alijani, B. and Mahmoud, R. (2010) Synoptic Analysis of Heavy Rainfall in South East Sixth of January 2008. Journal of Climatology, 5, 1-12. [10] Hand, W. (2003) A Historical Study of Exterm Rainfall Events in the 20th Century. Numerical Weather Prediction. [11] Alijani, B. (1998) Mechanisms of Rainfall Required, the Faculty of Letters and Human Sciences. Teacher Development, 85, 53-45.