Improve input data preparation (closes #111)

climix/main.py

@@ -6,6 +6,7 @@ import os
 import time
 
 import iris
+from iris.experimental.equalise_cubes import equalise_attributes
 import numpy as np
 import pkg_resources
 import yaml
@@ -116,8 +117,9 @@ def prepare_indices(index_definitions, requested_indices):
 
 
 def prepare_input_data(datafiles):
-    datacube = iris.load(datafiles, callback=ignore_cb)
+    datacube = iris.load_raw(datafiles, callback=ignore_cb)
     iris.util.unify_time_units(datacube)
+    equalise_attributes(datacube)
     cube = datacube.concatenate_cube()
     return cube