MEASURING SYSTEM OF ADVERSE WEATHER PHENOMENA
M. Ćurić
ABSTRACT. - Measuring system of adverse weather phenomena. The adverse weather phenomena in nowadays are becoming an extraordinary problem in human life and human activity. Therefore, it seems very important to know the thresholds of adverse weather phenomena. These thresholds can be calculated in different ways, but some experience has shown that for weather elements which departures from normal follow the normal distribution suits to use the Gaussian curve of frequency distribution (temperature and pressure). For such weather elements the normal curve of frequency distribution may be used for classification of thresholds. For weather elements which departures do not depend on such a frequency distribution configuration (precipitation amounts) may be used a decile method. For wind speed thresholds, the Beaufort scale units can be used for calculation. In this paper the threshold scales for four basic weather elemnts are presented. All these scales contain four steps each. They are defined: normal, above normal, much above normal and extraordinary above normal or normal, below normal, much below normal and extraordinary below normal. The examples by observations of Meteorological Observatory in Belgrade are presented.
Keywords: threshold scales, adverse weather phenomena, decile method, Gaussian curve of frequency.