IDENTIFICATION OF WEATHER TYPES IN ARAK STATION

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BAGHERI JALIL

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Journal: RESEARCH BULLETIN OF ISFAHAN UNIVERSITY (HUMANITIES) Year:2008 | Volume:32 | Issue:4 (GEOGRAPHY) Page(s): 131-150

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Title

IDENTIFICATION OF WEATHER TYPES IN ARAK STATION

Author(s)

BAGHERI JALIL | Issue Writer Certificate

Keywords

SYNOPTIC CLIMATOLOGYQ3

WEATHER TYPINGQ3

CLUSTER ANALYSISQ3

Abstract

In this paper, the main aim is the identification of weather types in Arak station. In this study we used 18 daily climatology variables including dry temperature between hours (15- 09-03), wet bulb between hours (15- 09-03), relative humidity (15- 09-03), wind speed (15- 09-03), wind direction (15- 09-03), daily precipitation amount, max and min temperature during the years of 1984/3/21 to 2004/3/19 in 20 years, two decades, for Arak station. At first a data base was provided in MATLAB software. This data base consisted of all the events whose number of variables was recorded in it. For data analysis, one of the shapes eigenvector named P was used for typing. In fact P arrangement is an arrangement of data matrix on which the climate variables are shown on columns and days on lines. Then the data were standardized so that each of the variables has an equal share in typing. At the end, on the standardized data, a CLUSTER ANALYSIS with the method of Ward link was carried on. Then a total dendrogram for station was drawn. With regard to the main dendrogram for Arak station, four main types were obtained. The type of warm and dry are the most frequent, most endurable, most dominant and the most homogeneous; it has grown in the recent years. The type of cold and humid is the most frequent and the most heterogeneous. The moderate type is the most harmonious, the least lasting and the most sporadic. The very cold and raining type is the least frequent and has the longest period of waiting for recurrence. In recent years, rainfall has occurred relatively. On the whole, the dominance of weather types has been illustrative of the dominance of various climatic seasons. Then for each type, frequency, occurrence, nonoccurrence, diversity, day representative and time period in the last two decades have been investigated so that frequency of weather type changes becomes known.

Cites

RECOGNITION OF WEATHER TYPES IN ARDABIL SYNOPTIC STATION AND ITS RELATIONSHIP WITH ATMOSPHERIC CIRCULATION PATTERNS

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APA: Copy

BAGHERI, JALIL. (2008). IDENTIFICATION OF WEATHER TYPES IN ARAK STATION. RESEARCH BULLETIN OF ISFAHAN UNIVERSITY (HUMANITIES), 32(4 (GEOGRAPHY)), 131-150. SID. https://sid.ir/paper/24906/en

Vancouver: Copy

BAGHERI JALIL. IDENTIFICATION OF WEATHER TYPES IN ARAK STATION. RESEARCH BULLETIN OF ISFAHAN UNIVERSITY (HUMANITIES)[Internet]. 2008;32(4 (GEOGRAPHY)):131-150. Available from: https://sid.ir/paper/24906/en

IEEE: Copy

JALIL BAGHERI, “IDENTIFICATION OF WEATHER TYPES IN ARAK STATION,” RESEARCH BULLETIN OF ISFAHAN UNIVERSITY (HUMANITIES), vol. 32, no. 4 (GEOGRAPHY), pp. 131–150, 2008, [Online]. Available: https://sid.ir/paper/24906/en

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