Make data lazier

Author: znicholls

src/netcdf_scm/iris_cube_wrappers.py

@@ -486,7 +486,7 @@ def _process_load_data_from_identifiers_warnings(self, w):
     def _add_areacella_measure(self):
         areacella_cube = self.get_metadata_cube(self.areacella_var).cube
         areacella_measure = iris.coords.CellMeasure(
-            areacella_cube.data,
+            areacella_cube.core_data(),
             standard_name=areacella_cube.standard_name,
             long_name=areacella_cube.long_name,
             var_name=areacella_cube.var_name,

src/netcdf_scm/utils.py

@@ -30,7 +30,7 @@ def get_cube_timeseries_data(scm_cube):
         The cube's timeseries data.
     """
     _assert_only_cube_dim_coord_is_time(scm_cube)
-    return scm_cube.cube.data
+    return scm_cube.cube.core_data()
 
 
 def get_scm_cube_time_axis_in_calendar(scm_cube, calendar):