A SYNOPTIC ANALYSIS OF JANUARY 2008 SEVER COLD IN IRAN

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AZIZI GH.; AKBARI T.; DAVUDI M.; AKBARI M.

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Journal: Physical Geography Research Year:2010 | Volume:- | Issue:70 Page(s): 1-19

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Title

A SYNOPTIC ANALYSIS OF JANUARY 2008 SEVER COLD IN IRAN

Author(s)

AZIZI GH. | AKBARI T. | DAVUDI M. | AKBARI M. | Issue Writer Certificate

Keywords

THERMAL WINDQ2

BLOCKING SYSTEMQ3

COLD ADVECTIONQ2

FROSTQ3

SYNOPTIC PATTERNSQ2

Abstract

introduction: January 2008 was one of the coldest days during the history of registering data in Iran. In this month an unusual cold air mass covered the most part of Iran particularly the north area of the country. As this air mass shifted southward, it produced very cold condition in all of the country and dry snowfall in the north parts and mountain area.Materials and methods: In this paper in order to investigation of unusual cold event on Jan 2008 in Iran, a dataset includes daily minimum temperature of Jan 2008 has been gathered from synoptic stations all over the country. Then, by using cluster analysis extracted 21 stations as selected stations; the final stations almost covered all of the country area. Z score index used for calculated minimum daily temperature anomalies. Then the calculated Z scores applied as an indicator in order to compared January 2008 minimum temperature with the long-term average minimum temperatures of January. Also extracted the four hourly temperature, sea level pressure, geopotential height, and the wind speed components (U & V components) for synoptic analysis of FROST events in the period of study from NCEP/NCAR. Position and movement of the atmospheric systems such as cyclones, anticyclones, fronts and wind fields were identified using synoptic maps. Also the daily temperature data and the wind speed components are used for plotting the composite maps of temperature advection, thickness, temperature gradient’s vectors, and THERMAL WIND.

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APA: Copy

AZIZI, GH., AKBARI, T., DAVUDI, M., & AKBARI, M.. (2010). A SYNOPTIC ANALYSIS OF JANUARY 2008 SEVER COLD IN IRAN. PHYSICAL GEOGRAPHY RESEARCH QUARTERLY, -(70), 1-19. SID. https://sid.ir/paper/138864/en

Vancouver: Copy

AZIZI GH., AKBARI T., DAVUDI M., AKBARI M.. A SYNOPTIC ANALYSIS OF JANUARY 2008 SEVER COLD IN IRAN. PHYSICAL GEOGRAPHY RESEARCH QUARTERLY[Internet]. 2010;-(70):1-19. Available from: https://sid.ir/paper/138864/en

IEEE: Copy

GH. AZIZI, T. AKBARI, M. DAVUDI, and M. AKBARI, “A SYNOPTIC ANALYSIS OF JANUARY 2008 SEVER COLD IN IRAN,” PHYSICAL GEOGRAPHY RESEARCH QUARTERLY, vol. -, no. 70, pp. 1–19, 2010, [Online]. Available: https://sid.ir/paper/138864/en

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