
Fields of study > Air temperature
Cold days (TX10p)
Cold days (TX10p): annual percentage of days with a maximum temperature (TX) less than the 10th percentile of the daily TX series for the base period 1981-2010. The unit of measurement is %.
The evolution of TX10p anomaly (ATX10p, difference between the annual value of TX10p and the mean value of TX10p in the reference period 1981-2010) during the period 1959-2020 is shown for the Pyrenees and for 4 areas of the Massif (Northern Pyrenees, Southern Pyrenees, Mediterranean Pyrenees and Atlantic Pyrenees); for each of the 12 series analyzed, the evolution of TX10p index is shown.
The annual mean of TX10p for the Pyrenees is obtained from the annual TX10p values of 12 representative series of the Pyrenees massif (areas at different altitudes and on all slopes: north, south, east or Mediterranean and west or Atlantic), while the mean value of TX10p for the 4 zones of the Massif is obtained from the annual TX10p values of the representative series located in each zone.