Add CORDEX-CMIP6 support (#3112)

Author: bouweandela

doc/reference/facets.rst

@@ -144,6 +144,38 @@ CMIP3
 | ``short_name``       | ``variable``          |
 +----------------------+-----------------------+
 
+
+CORDEX-CMIP6
+------------
+
+`Official CORDEX-CMIP6 facets <https://doi.org/10.5281/zenodo.10961068>`__.
+
++----------------------+---------------------------+
+| ESMValCore facet     | ESGF facet                |
++======================+===========================+
+| ``activity``         | ``activity_id``           |
++----------------------+---------------------------+
+| ``dataset``          | ``source_id``             |
++----------------------+---------------------------+
+| ``driver``           | ``driving_source_id``     |
++----------------------+---------------------------+
+| ``domain``           | ``domain_id``             |
++----------------------+---------------------------+
+| ``ensemble``         | ``driving_variant_label`` |
++----------------------+---------------------------+
+| ``exp``              | ``driving_experiment_id`` |
++----------------------+---------------------------+
+| ``frequency``        | ``frequency``             |
++----------------------+---------------------------+
+| ``institute``        | ``institution_id``        |
++----------------------+---------------------------+
+| ``project``          | ``project_id``            |
++----------------------+---------------------------+
+| ``rcm_version``      | ``version_realization``   |
++----------------------+---------------------------+
+| ``short_name``       | ``variable_id``           |
++----------------------+---------------------------+
+
 CORDEX
 -------
 
@@ -168,6 +200,8 @@ used on ESGF. Below we present the facets used on ESGF.
 +----------------------+-----------------------+
 | ``institute``        | ``institute``         |
 +----------------------+-----------------------+
+| ``rcm_version``      | ``rcm_version``       |
++----------------------+-----------------------+
 | ``short_name``       | ``variable``          |
 +----------------------+-----------------------+
 

esmvalcore/cmor/table.py

@@ -778,7 +778,7 @@ def _load_table(self, json_file):
                 self.tables[table_name] = table
             table = self.tables[table_name]
 
-            generic_levels = header["generic_levels"].split()
+            generic_levels = header.get("generic_levels", "").split()
             self.var_to_freq[table.name] = {}
 
             for var_name, var_data in raw_data["variable_entry"].items():

esmvalcore/cmor/tables/cordex-cmip6-custom/coordinates.json

@@ -0,0 +1,93 @@
+{
+    "axis_entry": {
+        "plev19": {
+            "standard_name": "air_pressure",
+            "units": "Pa",
+            "axis": "Z",
+            "long_name": "pressure",
+            "climatology": "",
+            "formula": "",
+            "must_have_bounds": "no",
+            "out_name": "plev",
+            "positive": "down",
+            "requested": [
+                "100000.",
+                "92500.",
+                "85000.",
+                "70000.",
+                "60000.",
+                "50000.",
+                "40000.",
+                "30000.",
+                "25000.",
+                "20000.",
+                "15000.",
+                "10000.",
+                "7000.",
+                "5000.",
+                "3000.",
+                "2000.",
+                "1000.",
+                "500.",
+                "100."
+            ],
+            "requested_bounds": "",
+            "stored_direction": "decreasing",
+            "tolerance": "",
+            "type": "double",
+            "valid_max": "",
+            "valid_min": "",
+            "value": "",
+            "z_bounds_factors": "",
+            "z_factors": "",
+            "bounds_values": "",
+            "generic_level_name": ""
+        },
+        "tau": {
+            "standard_name": "atmosphere_optical_thickness_due_to_cloud",
+            "units": "1",
+            "axis": "",
+            "long_name": "cloud optical thickness",
+            "climatology": "",
+            "formula": "",
+            "must_have_bounds": "yes",
+            "out_name": "tau",
+            "positive": "",
+            "requested": [
+                "0.15",
+                "0.8",
+                "2.45",
+                "6.5",
+                "16.2",
+                "41.5",
+                "100."
+            ],
+            "requested_bounds": [
+                "0.0",
+                "0.3",
+                "0.3",
+                "1.3",
+                "1.3",
+                "3.6",
+                "3.6",
+                "9.4",
+                "9.4",
+                "23.0",
+                "23.0",
+                "60.0",
+                "60.0",
+                "100000.0"
+            ],
+            "stored_direction": "increasing",
+            "tolerance": "",
+            "type": "double",
+            "valid_max": "",
+            "valid_min": "",
+            "value": "",
+            "z_bounds_factors": "",
+            "z_factors": "",
+            "bounds_values": "",
+            "generic_level_name": ""
+        }
+    }
+}

esmvalcore/cmor/tables/cordex-cmip6/README.md

@@ -0,0 +1,6 @@
+# CMIP7 CMOR Tables
+
+Contents of the "Tables" directory was copied from
+https://github.com/WCRP-CORDEX/cordex-cmip6-cmor-tables/tree/v2026.03.0.
+
+Version: [v2026.03.0](https://github.com/WCRP-CORDEX/cordex-cmip6-cmor-tables/releases/tag/v2026.03.0)