Issue #803: investigate missing depth coords

mip_convert/mip_convert/plugins/base/data/processors.py

@@ -1172,6 +1172,11 @@ def calc_zostoga(thetao, thkcello, areacello, zfullo_0, so_0, rho_0_mean, deptho
         Intercomparison Project. Geoscientific Model Development,
         9(9), pp.3231-3296.
     """
+    # Ensure the vertical coordinate is named consistently before processing
+    for cube in [thetao, thkcello]:
+        if not cube.coords('depth'):
+            _z_axis(cube).rename('depth')
+
     rho_mean = iris.cube.CubeList()
 
     so_0 = iris.util.squeeze(so_0)

mip_convert/mip_convert/save/cmor/cmor_wrapper.py

@@ -113,5 +113,5 @@ def zfactor(self, *args, **kwargs):
         cmor.zfactor(*args, **kwargs)
 
     def set_frequency(self, frequency, **kwargs):
-        self._debug_on_args('frequency', frequency, kwargs)
+        self._debug_on_args('frequency', [frequency], kwargs)
         cmor.cmor.set_cur_dataset_attribute('frequency', frequency)