Update LAND-DIAGS_README.md

Author: justin-richling

LAND-DIAGS_README.md

@@ -1 +1,34 @@
+## TEST for Land Diags:
 
+For this branch there are (3) ways to run the ADF:
+
+1) On native grid with unstructured plotting via Uxarray
+2) On native grid but gridded to lat/lon
+3) On already lat/lon gridded input files (hist, ts, or climo)
+
+For (1), the config yaml file will be essentially the same, but with a couple of additional arguments:
+  - in `diag_basic_info` set the `unstructured_plotting` argument to `true`
+  - in each of the test and baseline section supply a mesh file in the `mesh_file` argument
+
+  Example yaml file: `config_unstructured_plots.yaml`
+
+For (2), the config yaml file will need some additional arguments:
+  - in each of the test and baseline sections, supply the following arguments:
+
+    Weights file:
+    
+    `weights_file: /glade/work/wwieder/map_ne30pg3_to_fv0.9x1.25_scripgrids_conserve_nomask_c250108.nc`
+    
+    Regridding method:
+    
+    `regrid_method: 'conservative'`
+    
+    Lat/lon file:
+    
+    `latlon_file: /glade/derecho/scratch/wwieder/ctsm5.3.018_SP_f09_t232_mask/run/ctsm5.3.018_SP_f09_t232_mask.clm2.h0.0001-01.nc`
+
+  NOTE: The regridding method set in `regrid_method` MUST match the method in the weights file
+  
+  Example yaml file: `config_ldf_native_grid_to_latlon.yaml`
+
+