Very warm days percent (tx90p)

TechnicalInfo: cdo -eca_tx90p -ydrunpctl,90,5 TXref.nc -ydrunmin,5 TXref.nc -ydrunmax,5 TXref.nc out.nc Other: Percentage of warm days: Let TXt be the daily maximum temperature on day tand let TXin90 be the calendar day 90th percentile centred on a 5-day window for the base period 1981-2010. The percentage of time for the base period is determined where TXtk > TXin90.