New temperature indices for the estimation of temperature variability. Application in Athens’s greater area.

This current work attempts to explore the temperature’s variability through the selection of indicators that refer to the increases and decreases of three typical values of daily temperature (mean, maximum, minimum). The primary meteorological data that has been used come from the station of the Hellenic National Meteorological Service in Tatoi, the period 1955 to 2001. In total, nine indicators were developed; the time series of the number of days recorded with decrease, increase or stability of the day-by-day temperature’s characteristic value were examined annually and seasonally. The results of time series analysis led to the conclusion that, as time passes, there are changes in the decrease, increase and stability of the mean, minimum and maximum day-by-day temperature variability.