Climate indicators: warm nights percent (tn90p)

TechnicalInfo: cdo -eca_tn90p -ydrunpctl,90,5 TNref.nc -ydrunmin,5 TNref.nc -ydrunmax,5 TNref.nc out.nc Other: Percentage of warm nights: Let TNt be the daily minimum temperature on day t and let TNin90 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 TNt > TNin90.