Added NetCDF file compression.

climax/main/preprocess.py

@@ -179,9 +179,14 @@ if __name__ == '__main__':
                 # set encoding of time: calendar
                 ds.time.encoding = ds.time_bnds.encoding
 
+                # set NetCDF file compression for each variable
+                for _, var in ds.data_vars.items():
+                    var.encoding['zlib'] = True
+                    var.encoding['complevel'] = 5
+
                 # save aggregated netcdf file
-                LOGGER.info('Saving aggregated NetCDF: {}'.format(filename))
-                ds.to_netcdf(filename)
+                LOGGER.info('Compressing NetCDF: {}'.format(filename))
+                ds.to_netcdf(filename, engine='h5netcdf')
 
                 # remove single netcdf files from disk
                 if args.remove: