Some Features of Surface Air Temperature: A Statistical Viewpoint

摘要

A climatological study has been done in five weather stations viz Dhuburi, Guwahati, Silchar, Tezpur and Dibrugarh for 45 years (1969-2013), for studying and comparing maximum, minimum and mean temperatures. Coefficient of variation, skewness, kurtosis are also calculated and plotted for comparing the results of the stations. The values of period mean of annual surface air temperature are different at different stations and this value does not show homogeneous distribution in the regions. The pattern of distribution of annual mean of daily surface air temperature (maximum, minimum and mean) are asymmetrical over all the stations and have different peakedness at different stations means over all the stations that the distribution are deviates from the normal distribution from slight to significant amount. In most of the cases winter months has shown highest variation while summer month are least variable. Variation in spring and autumn months are in between these two extremes. Almost over all the stations, the patterns of distribution of monthly mean temperature (maximum, minimum and mean) are not normal. The distributions are both positively and negatively skewed and have both platykurtic and leptokurtic peakedness.