@BeginModule
@Name      = EcaTg90p
@Title     = Warm days percent wrt 90th percentile of reference period
@Section   = Climate indices
@Class     = Climate index
@Arguments = ifile1 ifile2 ofile
@Operators = eca_tg90p

@BeginDescription
Let @file{ifile1} be a time series of the daily mean temperature TG, and
@file{ifile2} be the 90th percentile TGn90 of daily mean temperatures
for any period used as reference. Then the percentage of time where TG > TGn90 
is calculated. 
TGn90 is calculated as the 90th percentile of daily mean temperatures of a five 
day window centred on each calendar day of a given climate reference period.
Note that both TG and TGn90 have to be given in the same units.
The date information of a timestep in @file{ofile} is the date of
the last contributing timestep in @file{ifile1}.
@EndDescription
@EndModule


@BeginOperator_eca_tg90p
@Title     = Warm days percent wrt 90th percentile of reference period
@EndOperator


@BeginExample
To compute the percentage of timesteps with a daily mean temperature
greater than the 90th percentile of the daily mean temperatures for
a given reference period use:
@BeginVerbatim
   cdo eca_tg90p tgfile tgn90file ofile
@EndVerbatim
@EndExample
