THE SYNOPTIC ACTIVITY CENTERS AND PRESSURE PATTERNS OF HEAVY SNOWFALL IN NORTHWEST OF IRAN

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SHAKIBA AMINA; SADEGHI SOLEIMAN; DOOSTAN REZA

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Journal: GEOGRAPHY AND ENVIRONMENTAL HAZARDS Year:2016 | Volume:4 | Issue:16 Page(s): 25-29

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Title

THE SYNOPTIC ACTIVITY CENTERS AND PRESSURE PATTERNS OF HEAVY SNOWFALL IN NORTHWEST OF IRAN

Author(s)

SHAKIBA AMINA | SADEGHI SOLEIMAN | DOOSTAN REZA | Issue Writer Certificate

Keywords

HEAVY SNOWQ1

PRINCIPAL COMPONENT ANALYSISQ2

ACTION CENTERSQ2

PRESSURE PATTERNQ2

NORTHWEST OF IRANQ2

Abstract

1. Introduction: The position of Iran in the subtropical region that has made its arid and semiarid climate and the topographic diversity changes this trend of climate. Therefore, climate hazards such as frost, flood, dust storm, drought, temperature anomalies, heavy rainfall, avalanches, snow, sleet, etc occur in Iran. The NORTHWEST OF IRAN experiences the above conditions following the arrival of west winds, cool and humid polar air mass from the East Europe, and the complex topography (mountain nodes of Iran). The relationships among climate hazards, and the weather patterns and identifying climate anomaly patterns of activity can mitigate the effects of climate and forecasting atmospheric phenomena, which helps the planners and managers. Much research has been done in this regard, including the planetary-scale circulation anomalies compared with synopticscale anomalies associated with higher intensity of extreme weather events are in America (Konrad, 1995, p.1067) and the atmospheric circulation patterns associated with HEAVY SNOWfall in Montana of America, with a deep trough in the west winds and the cold flow from northwest, and with temperatures below zero (Birkland & Mock, 1996, p.281). The flow pattern in the Great Lakes Basin winter severity Lorentz in the period of 1950-1998 were shows to the prevailing winter circulation patterns in the three synoptic type associated with the winter cold, temperate and hot identified, each of them during the rule of a special circular pattern (Rodionov & Assel, 2000, p.601). The daily circulation patterns causing HEAVY SNOWfall in Poland using PRINCIPAL COMPONENT ANALYSIS are related to strong positive anomalies in the Nordic and North Atlantic sealevel pressure, with positive anomalies of Iceland and the Azores high pressure weak anomalies (Bednorz, 2008, p.133). The aim of this study is identified the atmospheric important index of HEAVY SNOW in the middle levels in NORTHWEST OF IRAN...

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APA: Copy

SHAKIBA, AMINA, SADEGHI, SOLEIMAN, & DOOSTAN, REZA. (2016). THE SYNOPTIC ACTIVITY CENTERS AND PRESSURE PATTERNS OF HEAVY SNOWFALL IN NORTHWEST OF IRAN. GEOGRAPHY AND ENVIRONMENTAL HAZARDS, 4(16), 25-29. SID. https://sid.ir/paper/356591/en

Vancouver: Copy

SHAKIBA AMINA, SADEGHI SOLEIMAN, DOOSTAN REZA. THE SYNOPTIC ACTIVITY CENTERS AND PRESSURE PATTERNS OF HEAVY SNOWFALL IN NORTHWEST OF IRAN. GEOGRAPHY AND ENVIRONMENTAL HAZARDS[Internet]. 2016;4(16):25-29. Available from: https://sid.ir/paper/356591/en

IEEE: Copy

AMINA SHAKIBA, SOLEIMAN SADEGHI, and REZA DOOSTAN, “THE SYNOPTIC ACTIVITY CENTERS AND PRESSURE PATTERNS OF HEAVY SNOWFALL IN NORTHWEST OF IRAN,” GEOGRAPHY AND ENVIRONMENTAL HAZARDS, vol. 4, no. 16, pp. 25–29, 2016, [Online]. Available: https://sid.ir/paper/356591/en

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