A statistical analysis of the data contained in the NOAA’s Storm Prediction Center tornado archive (covering the period 1950-2018) has been carried out. " e actual average values of the frequencies for the various intensity classes could be eff ectively provided for the period 1991-2018, because of some inhomogeneities of the archive due to variations in the methods and procedures of tornado reporting. " e time series of the frequency of F2, F3, F4 and F5 events showed decreasing trends; this decline seems largely due to a signifi cant reduction of the strongest events. " is interpretation is supported by the decreasing trends of normalized economic losses and of number of victims.
I tornado negli USA: un’analisi dell’archivio dati (1950-2018)
pinna s.
2020-01-01
Abstract
A statistical analysis of the data contained in the NOAA’s Storm Prediction Center tornado archive (covering the period 1950-2018) has been carried out. " e actual average values of the frequencies for the various intensity classes could be eff ectively provided for the period 1991-2018, because of some inhomogeneities of the archive due to variations in the methods and procedures of tornado reporting. " e time series of the frequency of F2, F3, F4 and F5 events showed decreasing trends; this decline seems largely due to a signifi cant reduction of the strongest events. " is interpretation is supported by the decreasing trends of normalized economic losses and of number of victims.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
