STATISTICAL ANALYSIS OF AGRICULTURAL FROSTS IN NAJAFABAD STATION

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MONTAZERI MAJID

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Journal: Journal of Geography and Environmental Studies Year:2010 | Volume:1 | Issue:4 Page(s): 27-38

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Title

STATISTICAL ANALYSIS OF AGRICULTURAL FROSTS IN NAJAFABAD STATION

Author(s)

MONTAZERI MAJID | Issue Writer Certificate

Keywords

AGRICULTURAL FROSTQ3

MINIMUM TEMPERATUREQ2

TREND ANALYSISQ2

β TESTQ3

MANN-KENDALL TESTQ3

Abstract

In order to investigate the statistical analysis of AGRICULTURAL FROST phenomena in Najafabad, the MINIMUM TEMPERATURE data from 1/1/1961 up to 31/12/2004 equal to 16071 days were extracted from Najafabad climatology station. Then these data were reanalyzed and the Christian calendar was converted to solar calendar. The number of frost days were calculated in each year and then arranged by a 365 * 93 matrix. Later, based on this matrix, the number of frost days was calculated, and after becoming confident of the independence of data and its normal distribution, using linear regression and, Beta test and Mann-Kendall TREND ANALYSIS, no significant trend was observed in the number of annual frost days. The investigations showed that although the frost days have not decreased, the occurrence of severe frosts has started to decrease. On the other hand, the increase in frequency of zero temperature had been reported. The length of frost period in Najafabad is about four months which lasts from mid November to Mid March. The frost in Najafabad does not begin sooner than the end of March and does not last more than the end of September. The studies showed that there has not been significant trend in the length of frost period based on zero thresholds.

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APA: Copy

MONTAZERI, MAJID. (2010). STATISTICAL ANALYSIS OF AGRICULTURAL FROSTS IN NAJAFABAD STATION. GEOGRAPHY AND ENVIRONMENTAL STUDIES, 1(4), 27-38. SID. https://sid.ir/paper/186420/en

Vancouver: Copy

MONTAZERI MAJID. STATISTICAL ANALYSIS OF AGRICULTURAL FROSTS IN NAJAFABAD STATION. GEOGRAPHY AND ENVIRONMENTAL STUDIES[Internet]. 2010;1(4):27-38. Available from: https://sid.ir/paper/186420/en

IEEE: Copy

MAJID MONTAZERI, “STATISTICAL ANALYSIS OF AGRICULTURAL FROSTS IN NAJAFABAD STATION,” GEOGRAPHY AND ENVIRONMENTAL STUDIES, vol. 1, no. 4, pp. 27–38, 2010, [Online]. Available: https://sid.ir/paper/186420/en

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