Create fre/cmor/README.md

fre/cmor/README

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+old usage notes at the top of `CMORmixer.py`
+
+# Before start this script in common way run these 2 command in terminal where you are going to execute this script:
+#     module load python/3.9
+#     conda activate cmor
+
+# another possible runs without any preparation in terminal:
+#    /home/san/anaconda/envs/cmor_dev/bin/python
+#    /app/spack/v0.15/linux-rhel7-x86_64/gcc-4.8.5/python/3.7.7-d6cyi6ophaei6arnmzya2kn6yumye2yl/bin/python
+
+
+# How to run it (simple examples):
+# ~/fms_yaml_tools/CMOR_3/CMORmixer.py
+#   -d /archive/oar.gfdl.cmip6/CM4/warsaw_201710_om4_v1.0.1/CM4_1pctCO2_C/gfdl.ncrc4-intel16-prod-openmp/pp/atmos/ts/monthly/5yr
+#   -l /home/san/CMOR_3/GFDL-CM4_1pctCO2_C_CMOR-Amon.lst
+#   -r /home/san/CMOR/cmor/cmip6-cmor-tables/Tables/CMIP6_Amon.json
+#   -p /home/san/CMOR/cmor/Test/CMOR_input_CM4_1pctCO2_C.json
+
+# ~/fms_yaml_tools/CMORmixer.py
+#	-d /archive/Fabien.Paulot/ESM4/H2/ESM4_amip_D1_soilC_adj/gfdl.ncrc3-intel16-prod-openmp/pp/land/ts/monthly/5yr
+#   -l /home/san/CMOR_3/GFDL-ESM4_amip_CMOR-landCML.lst
+#   -r /home/san/CMOR/cmor/cmip6-cmor-tables/Tables/CMIP6_Lmon.json
+#   -p /home/san/CMOR/cmor/Test/CMOR_input_ESM4_amip.json
+
+# ~/fms_yaml_tools/CMORmixer.py
+#   -d /archive/oar.gfdl.cmip6/CM4/warsaw_201710_om4_v1.0.1/CM4_historical/gfdl.ncrc4-intel16-prod-openmp/pp/atmos/ts/monthly/5yr
+#   -l /home/san/CMOR_3/GFDL-CM4_historical_CMOR-Amon.lst
+#   -r /home/san/CMOR/cmor/cmip6-cmor-tables/Tables/Atmos_Monthly.json
+#   -p /home/san/CMOR/cmor/Test/CMOR_input_CM4_historical.json
+
+# ~/fms_yaml_tools/CMORmixer.py
+#   -d /archive/oar.gfdl.cmip6/ESM4/DECK/ESM4_historical_D1/gfdl.ncrc4-intel16-prod-openmp/pp/atmos_cmip/ts/daily/5yr
+#   -l /home/san/CMOR_3/GFDL-ESM4_CMOR-day_historical.lst
+#   -r /home/san/CMOR/cmor/cmip6-cmor-tables/Tables/CMIP6_day.json
+#   -p /home/san/CMOR/cmor/Test/CMOR_input_ESM4_historical.json
+#   -o /net2/san
+
+# ~/fms_yaml_tools/CMORmixer.py
+#   -d /archive/oar.gfdl.cmip6/ESM4/DECK/ESM4_historical_D1/gfdl.ncrc4-intel16-prod-openmp/pp/atmos/ts/6hr/5yr
+#   -l /home/san/CMOR_3/GFDL-ESM4_CMOR-6hr.lst
+#   -r /home/san/CMOR/cmor/cmip6-cmor-tables/Tables/CMIP6_6hrPlev.json
+#   -p /home/san/CMOR/cmor/Test/CMOR_input_ESM4_historical.json
+
+# ~/fms_yaml_tools/CMORmixer.py
+#   -d /archive/oar.gfdl.cmip6/ESM4/DECK/ESM4_historical_D1/gfdl.ncrc4-intel16-prod-openmp/pp/atmos_cmip/ts/3hr/5yr
+#   -l /home/san/CMOR_3/GFDL_ESM4_historical_CMOR-3hr.lst
+#   -r /home/san/CMOR/cmor/cmip6-cmor-tables/Tables/CMIP6_3hr.json
+#   -p /home/san/CMOR/cmor/Test/CMOR_input_ESM4_historical.json
+#   -o /net2/san
+
+# Additional tables containing in /home/san/CMIP6_work/cmor/cmip6-cmor-tables/Tables:
+#    CMIP6_CV.json
+#    CMIP6_formula_terms.json
+#    CMIP6_grids.json
+#   CMIP6_coordinate.json
+
+# Detailed description of program is placed at
+#    https://docs.google.com/document/d/1HPetcUyrVXDwCBIyWheZ_2JzOz7ZHi1y3vmIlcErYeA/edit?pli=1
+
+# Keep in mind rule for input ../cmor/cmip6-cmor-tables/Tables/*.json:
+#    output variables can not contain "_" in out_name, though name (and standard_name) itself can have it; example:
+#        "alb_sfc": {
+#            "frequency": "mon",
+#            "modeling_realm": "atmos",
+#            "standard_name": "alb_sfc",
+#            "units": "percent",
+#            "cell_methods": "area: time: mean",
+#            "long_name": "surface albedo",
+#            "comment": "",
+#            "dimensions": "longitude latitude time",
+#            "out_name": "albsfc",
+#            "type": "real",
+#            "positive": "",
+#            "valid_min": "",
+#            "valid_max": "",
+#            "ok_min_mean_abs": "",
+#            "ok_max_mean_abs": ""
+#        }
+
+# Problems with standard CMOR library:
+#   - monthly variable "enth_conv_col" produces error - CMOR expects 4 dimensions but it has only 3;
+#   - variable /archive/oar.gfdl.cmip6/CM4/warsaw_201710_om4_v1.0.1/CM4_historical/gfdl.ncrc4-intel16-prod-openmp/pp/atmos_cmip/ts/3hr/5yr/atmos_cmip.1965010100-1969123123.clt.nc
+#     is not readable.