FREQUENCY ANALYSIS OF SNOWFALL IN IRAN OVER THE PAST DECADES (TECHNICAL NOTE)

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MONTAZERI M.

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2018 | Volume:14 | Issue:2 Page(s): 281-289

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Title

FREQUENCY ANALYSIS OF SNOWFALL IN IRAN OVER THE PAST DECADES (TECHNICAL NOTE)

Author(s)

MONTAZERI M. | Issue Writer Certificate

Keywords

PRESENT WEATHERQ1

SNOW CODESQ1

FREQUENCY OF SNOWFALLQ1

DRY TEMPERATUREQ1

DEW POINT TEMPERATUREQ1

IRANQ2

Abstract

In order to investigate the FREQUENCY OF SNOWFALL in IRAN over the past decades, the data of present hourly weather were used at 304 synoptic stations during the period of 1951-2010. First, 6 snowfall parameters were extracted and the time series of temperature, dew point, and percentage of SNOW CODES were calculated. Also the temperature conditions of the dew point and the temperature of the dew point were considered in time of snowfall. The results showed that snowfall in IRAN is a low frequency phenomenon and includes less than 2% of the PRESENT WEATHER. On the other hand, shower snowfall and extreme snow are not common, and most of the snowfall is mild to moderate.In terms of time, snowing is possible in IRAN from November to the beginning of April, but most snow events occur in months of January and February. There is a possibility of snow falling throughout the day and night, but the highest frequency of snow associates to the early hours of the day, especially between 6 to 10 am. The frequency distribution of snowfall has a negative skewness and its axis of symmetry is around zero degrees. So that the best temperature conditions in ground surface for snowfall is around zero degrees Celsius, especially in the temperature range of 1 to -5 degrees Celsius.

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APA: Copy

MONTAZERI, M.. (2018). FREQUENCY ANALYSIS OF SNOWFALL IN IRAN OVER THE PAST DECADES (TECHNICAL NOTE). IRAN-WATER RESOURCES RESEARCH, 14(2 ), 281-289. SID. https://sid.ir/paper/100359/en

Vancouver: Copy

MONTAZERI M.. FREQUENCY ANALYSIS OF SNOWFALL IN IRAN OVER THE PAST DECADES (TECHNICAL NOTE). IRAN-WATER RESOURCES RESEARCH[Internet]. 2018;14(2 ):281-289. Available from: https://sid.ir/paper/100359/en

IEEE: Copy

M. MONTAZERI, “FREQUENCY ANALYSIS OF SNOWFALL IN IRAN OVER THE PAST DECADES (TECHNICAL NOTE),” IRAN-WATER RESOURCES RESEARCH, vol. 14, no. 2 , pp. 281–289, 2018, [Online]. Available: https://sid.ir/paper/100359/en

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