Cesm cat builder (#726)

* move call_build function to base class and define a class parser attribute that is modified for each child class at initialization

* move parsers and json utilities to a separate module

* refine gfdl parsers

* add function to get metadata from file attributes

* add debugging statements to catalog_builder
make reference dict definition a function
refine the catalog population procedure
need to define time_range

* fix cesm parser frequency def
add procedure to generate time_range to parsers
add procedure to fix units in catalog

* add entries to CESM and GFDL fieldlists

* clean up cesm parser
include file name parts in cesm parser frequency search

* clean up print statements

data/fieldlist_CESM.jsonc

@@ -37,12 +37,26 @@
     },
     "lev": {
       "standard_name": "atmosphere_hybrid_sigma_pressure_coordinate",
-      "units": "level", // equivalent to '1'
+      "units": "level",
+      // equivalent to '1'
       "positive": "down",
       "axis": "Z"
     },
+    "hyam": {
+      "standard_name": "hybrid A coefficient at layer midpoints",
+      "long_name": "hybrid A coefficient at layer midpoints",
+      "units": "1",
+      "axis": "Z"
+
+    },
+    "hybm": {
+      "standard_name": "hybrid B coefficient at layer midpoints",
+      "long_name": "hybrid B coefficient at layer midpoints",
+      "units": "1",
+      "axis": "Z"
+    },
     "z_t": {
-      "standard_name": "depth from surface to midpoint of layer",
+      "standard_name": "depth_from_surface_to_midpoint_of_layer",
       "units": "centimeters",
       "positive": "down",
       "axis": "Z"
@@ -61,13 +75,55 @@
       "scalar_coord_templates": {"plev": "U{value}"},
       "ndim": 4
     },
+     "U250": {
+       "standard_name": "eastward_wind",
+       "long_name": "Zonal wind at 250 mbar pressure surface",
+       "realm": "atmos",
+       "units": "m s-1",
+       "ndim": 3
+     },
+      "U200": {
+       "standard_name": "eastward_wind",
+       "long_name": "Zonal wind at 200 mbar pressure surface",
+       "realm": "atmos",
+       "units": "m s-1",
+       "ndim": 3
+     },
+      "U850": {
+       "standard_name": "eastward_wind",
+       "long_name": "Zonal wind at 850 mbar pressure surface",
+       "realm": "atmos",
+       "units": "m s-1",
+       "ndim": 3
+     },
     "V": {
       "standard_name": "northward_wind",
       "realm":"atmos",
       "units": "m s-1",
       "scalar_coord_templates": {"plev": "V{value}"},
       "ndim": 4
     },
+    "V250": {
+      "standard_name": "northward_wind",
+      "long_name": "Meridional wind at 250 mbar pressure surface",
+      "realm":"atmos",
+      "units": "m s-1",
+      "ndim": 3
+    },
+     "V200": {
+      "standard_name": "northward_wind",
+      "long_name": "Meridional wind at 200 mbar pressure surface",
+      "realm":"atmos",
+      "units": "m s-1",
+      "ndim": 3
+    },
+     "V850": {
+      "standard_name": "northward_wind",
+      "long_name": "Meridional wind at 850 mbar pressure surface",
+      "realm":"atmos",
+      "units": "m s-1",
+      "ndim": 3
+    },
     "Z3": {
       "standard_name": "geopotential_height",
       "units": "m",
@@ -78,10 +134,23 @@
     },
     "Z500": {
       "standard_name": "geopotential_height",
-      "long_name": "geopotential height at 500 hPa",
+      "long_name": "geopotential height at 500 mbar pressure surface",
+      "realm": "atmos",
+      "units": "m",
+      "ndim": 3
+    },
+    "Z850": {
+      "standard_name": "geopotential_height",
+      "long_name": "geopotential height at 850 mbar pressure surface",
+      "realm": "atmos",
+      "units": "m",
+      "ndim": 3
+    },
+    "Z250": {
+      "standard_name": "geopotential_height",
+      "long_name": "geopotential height at 250 mbar pressure surface",
       "realm": "atmos",
       "units": "m",
-      // note: 4d name is 'Z3' but Z500 = height at 500 mb, etc.
       "ndim": 3
     },
     "Q": {
@@ -96,6 +165,13 @@
       "units": "Pa s-1",
       "scalar_coord_templates": {"plev": "OMEGA{value}"},
       "ndim": 4
+    },
+     "OMEGA500": {
+      "standard_name": "lagrangian_tendency_of_air_pressure",
+       "long_name": "Vertical velocity at 500 mbar pressure surface",
+      "realm": "atmos",
+      "units": "Pa s-1",
+      "ndim": 3
     },
     "TS": {
       "standard_name": "surface_temperature",
@@ -349,6 +425,13 @@
       "realm": "atmos",
       "units": "K",
       "ndim": 4
+    },
+     "T250": {
+      "standard_name": "air_temperature",
+       "long_name": "air temperature at 250 mbar pressure surface",
+      "realm": "atmos",
+      "units": "K",
+      "ndim": 3
     },
     // prw: Column Water Vapor (precipitable water vapor), units = mm (or kg/m^2)
     "prw": {
@@ -358,6 +441,7 @@
       "units": "kg m-2",
       "ndim": 3
     }
+
     // Variables for SM_ET_coupling module
     // "mrsos": {
     //   "standard_name": "mass_content_of_water_in_soil_layer",

data/fieldlist_GFDL.jsonc

@@ -625,14 +625,14 @@
       "ndim": 3
     },
     "zg500": {
-      "standard_name": "",
+      "standard_name": "geopotential_height",
       "long_name": "Geopotential Height at 500 hPa",
       "realm": "atmos",
       "units": "m",
       "ndim": 3
     },
     "zg": {
-      "standard_name": "",
+      "standard_name": "geopotential_heihgt",
       "long_name": "Geopotential Height",
       "realm": "atmos",
       "units": "m",