
Fields of study > Precipitation
Precipitation on very wet days (R95p)
Precipitation on very wet days (R95p): annual value of accumulated precipitation on “very wet days”, where a very wet day is defined as being greater than the 95th percentile of wet days (PPT ≥ 1,0 mm) during the reference period 1981-2010. The unit of measurement for R95p is millimeters (mm, equivalent to liters per square meter) and for AR95p (it is a relative anomaly) is percentage (%).
The evolution of R95p anomaly (AR95p, calculated as the quotient of the difference between the annual value of R95p and the mean value of R95p in the reference period 1981-2010 divided by this mean value of the reference period) 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 26 series analyzed, the evolution of R95p index is shown.
The annual mean of R95p for the Pyrenees is obtained from the annual R95p values of 26 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 R95p for the 4 zones of the Massif is obtained from the annual R95p values of the representative series located in each zone.