This is a little example on how to work with CMIP6 data and plot it

the data was first prepared by using CDOs:

ONI_all.sh
    this script reads in SST-data (tos*.nc), selects the NINO3.4 region, 
    calculates anomalies to a centered base-period, calculates a 3month-running mean
    and averages it over the region
    the ONI is the outcome

    (this does not work in the example directory though, since not all the data is there)
#----------------------------------------------------------------------------
following are two python scripts as examples on how to read in and plot the data
these should also work within this example directory

ONI_plot.py 
     reads in a list of files containing ONI 
        (these files were created by a ONI_all.sh, which calculates the ONI from SST-data (tos-files) with cdo)
     plots time series of ONI for each file (model)

     in: ./exampledata/*.nc
     out: ./exampledata/plots/<name>.pdf

#--------------------------------------------------------------------------------
ONI_trend.py
     reads in a list of files containing ONI 
        (these files were created by a ONI_all.sh, which calculates the ONI from SST-data (tos-files) with cdo)
     plots ONI and 30year moving average for each model (window is easily adjustable)
     plots moving average and its mean for whole ensemble

     in: ./exampledata/*.nc
     out ./exampledata/plots/Trend*.pdf