Mapping of CORDEX-CMIP6 variable names to CMIP7-style branded variable names

[sol1105]

Branded variables

are a new naming system, introduced with CMIP7, that combines a root_name with a branding_label to create a unique variable identifier: The root_name identifies the physical property (eg tas for near-surface air temperature), and the branding_label (eg. tavg_h2m_hxy_u for time average, height2m, lat-lon, unmasked) specifies temporal and spatial (horizontal and vertical) sampling characteristics, as well as potential masking (eg. where sea, where sea-ice). This aims to provide a more precise and standardized way to name variables compared to the compound names (eg. Amon_tas, i.e. CMOR table name plus variable name) used before. The branded variables will be versioned in a registry (https://github.com/WCRP-CMIP/Variable-Registry - not yet fully implemented and operational), very much like CF standard names. In fact CF standard names are very central in the definition of a branded variable as well.

The new QC plugin will not verify variable metadata against CMOR tables, but against the variable registry (temporarily, until the variable register is implemented and operational, might (have to) implement a fallback to CMOR tables...). This is why we need to provide a mapping from CORDEX-CMIP6 variables as they are defined in the CMOR tables to branded variable entries in the registry.

I set up the following gist to begin this task:
https://gist.github.com/sol1105/eefe12250e818fc00bf7e34f59c2a7c0

I noticed the following issues:

• Not all vertical axes used in CORDEX-CMIP6 are already supported by the CMIP branded variable mapper that is used to generate the branding_label out of the cell_methods and dimensions (and have therefore likey be registered with the variable registry when that is possible).
• Some variables differ in terms of the masking part of the branding_label, coming from slight differences in the cell_methods:
  • fx.thkcello: area: mean (CORDEX) vs area: mean where sea (CMIP7)
  • mon.uo: time: area: mean (CORDEX) vs area: mean where sea time: mean (CMIP7)
  • etc.
• Not all CORDEX-CMIP6 variables exist in the CMIP7 / the variable registry
  • partly as a consequence from the points given above, about yet unsupported vertical axes and slightly differing cell_methods
  • but also: rootd, sfturf, li, cape, etc. do not yet exist at all
• There are differences between CORDEX-CMIP6 and CMIP7 / variable registry in the important attributes positive and standard_name for one and the same variable. The ones I found so far are listed in the following:

- mon.rluscs
	+ standard_name:
		CC6: surface_upwelling_longwave_flux_in_air_assuming_clear_sky
		 C7: surface_upwelling_longwave_flux_assuming_clear_sky
- mon.wo
	+ positive:
		CC6: up
		 C7: 
- day.rluscs
	+ standard_name:
		CC6: surface_upwelling_longwave_flux_in_air_assuming_clear_sky
		 C7: surface_upwelling_longwave_flux_assuming_clear_sky
- day.uos
	+ standard_name:
		CC6: surface_eastward_sea_water_velocity
		 C7: surface_sea_water_x_velocity
- day.vos
	+ standard_name:
		CC6: surface_northward_sea_water_velocity
		 C7: surface_sea_water_y_velocity
- day.wo
	+ positive:
		CC6: up
		 C7: 
- 6hr.rluscs
	+ standard_name:
		CC6: surface_upwelling_longwave_flux_in_air_assuming_clear_sky
		 C7: surface_upwelling_longwave_flux_assuming_clear_sky

(even if those standard_names where aliases it is an unnecessary inconsistency)

• There are also differences in less important attributes like comment and long_name.

-> Should those differences be addressed in the CORDEX-CMIP6 CMOR tables to be consistent? This might be problematic for modeling groups that are already sitting on their CMORized data and wait for the GO for publication from ESGF. But on the other hand there was not yet a tagged release of the CMOR tables and there have been changes not too long back.

It is planned that the variable registry will support legacy variable descriptions from other projects (CORDEX, CMIP6, obs4MIPs, ...) that conflict with the information in the variable registry. But when this support will be implemented or operational and how it will look like, is not yet clear.

In the following a first version of the variable mapping. A problem in my gist code is yet to properly create the root_name out of the CORDEX out_name, eg. wa250 --> wa. Also one will have to check carefully which vertical axes or cell_methods used by CORDEX-CMIP6 are not yet supported by the CMIP mapper and need to be registered along with the yet generally missing physical parameters in the variable registry.

[mapping_variables]
"fx.orog" = "orog_ti-u-hxy-u"
"fx.sftlf" = "sftlf_ti-u-hxy-u"
"fx.sftgif" = "sftgif_ti-u-hxy-u"
"fx.mrsofc" = "mrsofc_ti-u-hxy-lnd"
"fx.rootd" = "rootd_ti-u-hxy-u"
"fx.sftlaf" = "sftlaf_ti-u-hxy-u"
"fx.sfturf" = "sfturf_ti-u-hxy-u"
"fx.dtb" = "dtb_ti-u-hxy-u"
"fx.areacella" = "areacella_ti-u-hxy-u"
"fx.areacello" = "areacello_ti-u-hxy-u"
"fx.deptho" = "deptho_ti-u-hxy-sea"
"fx.sftof" = "sftof_ti-u-hxy-u"
"fx.thkcello" = "thkcello_ti-ol-hxy-u"
"fx.volcello" = "volcello_ti-ol-hxy-u"
"mon.tas" = "tas_tavg-h2m-hxy-u"
"mon.tasmax" = "tasmax_tmax-h2m-hxy-u"
"mon.tasmin" = "tasmin_tmin-h2m-hxy-u"
"mon.pr" = "pr_tavg-u-hxy-u"
"mon.evspsbl" = "evspsbl_tavg-u-hxy-u"
"mon.huss" = "huss_tavg-h2m-hxy-u"
"mon.hurs" = "hurs_tavg-h2m-hxy-u"
"mon.ps" = "ps_tavg-u-hxy-u"
"mon.psl" = "psl_tavg-u-hxy-u"
"mon.sfcWind" = "sfcWind_tavg-h10m-hxy-u"
"mon.uas" = "uas_tavg-h10m-hxy-u"
"mon.vas" = "vas_tavg-h10m-hxy-u"
"mon.clt" = "clt_tavg-u-hxy-u"
"mon.rsds" = "rsds_tavg-u-hxy-u"
"mon.rlds" = "rlds_tavg-u-hxy-u"
"mon.ts" = "ts_tavg-u-hxy-u"
"mon.tsl" = "tsl_tavg-sl-hxy-lnd"
"mon.prc" = "prc_tavg-u-hxy-u"
"mon.prsn" = "prsn_tavg-u-hxy-u"
"mon.mrros" = "mrros_tavg-u-hxy-lnd"
"mon.mrro" = "mrro_tavg-u-hxy-lnd"
"mon.snm" = "snm_tavg-u-hxy-lnd"
"mon.tauu" = "tauu_tavg-u-hxy-u"
"mon.tauv" = "tauv_tavg-u-hxy-u"
"mon.sfcWindmax" = "sfcWindmax_tmax-h10m-hxy-u"
"mon.sund" = "sund_tsum-u-hxy-u"
"mon.rsdsdir" = "rsdsdir_tavg-u-hxy-u"
"mon.rsus" = "rsus_tavg-u-hxy-u"
"mon.rlus" = "rlus_tavg-u-hxy-u"
"mon.rlut" = "rlut_tavg-u-hxy-u"
"mon.rsdt" = "rsdt_tavg-u-hxy-u"
"mon.rsut" = "rsut_tavg-u-hxy-u"
"mon.hfls" = "hfls_tavg-u-hxy-u"
"mon.hfss" = "hfss_tavg-u-hxy-u"
"mon.mrfso" = "mrfso_tavg-u-hxy-lnd"
"mon.mrfsos" = "mrfsos_tavg-u-hxy-lnd"
"mon.mrsfl" = "mrsfl_tavg-sl-hxy-lnd"
"mon.mrso" = "mrso_tavg-u-hxy-lnd"
"mon.mrsos" = "mrsos_tavg-u-hxy-lnd"
"mon.mrsol" = "mrsol_tavg-sl-hxy-lnd"
"mon.snw" = "snw_tavg-u-hxy-lnd"
"mon.snc" = "snc_tavg-u-hxy-u"
"mon.snd" = "snd_tavg-u-hxy-lnd"
"mon.siconca" = "siconca_tavg-u-hxy-u"
"mon.zmla" = "zmla_tavg-u-hxy-u"
"mon.prw" = "prw_tavg-u-hxy-u"
"mon.clwvi" = "clwvi_tavg-u-hxy-u"
"mon.clivi" = "clivi_tavg-u-hxy-u"
"mon.ua1000" = "ua1000_tavg-1000hPa-hxy-u"
"mon.ua925" = "ua925_tavg-925hPa-hxy-u"
"mon.ua850" = "ua850_tavg-850hPa-hxy-u"
"mon.ua700" = "ua700_tavg-700hPa-hxy-u"
"mon.ua600" = "ua600_tavg-u-hxy-u"
"mon.ua500" = "ua500_tavg-500hPa-hxy-u"
"mon.ua400" = "ua400_tavg-u-hxy-u"
"mon.ua300" = "ua300_tavg-u-hxy-u"
"mon.ua250" = "ua250_tavg-u-hxy-u"
"mon.ua200" = "ua200_tavg-200hPa-hxy-u"
"mon.va1000" = "va1000_tavg-1000hPa-hxy-u"
"mon.va925" = "va925_tavg-925hPa-hxy-u"
"mon.va850" = "va850_tavg-850hPa-hxy-u"
"mon.va700" = "va700_tavg-700hPa-hxy-u"
"mon.va600" = "va600_tavg-u-hxy-u"
"mon.va500" = "va500_tavg-500hPa-hxy-u"
"mon.va400" = "va400_tavg-u-hxy-u"
"mon.va300" = "va300_tavg-u-hxy-u"
"mon.va250" = "va250_tavg-u-hxy-u"
"mon.va200" = "va200_tavg-200hPa-hxy-u"
"mon.ta1000" = "ta1000_tavg-1000hPa-hxy-u"
"mon.ta925" = "ta925_tavg-925hPa-hxy-u"
"mon.ta850" = "ta850_tavg-850hPa-hxy-u"
"mon.ta700" = "ta700_tavg-700hPa-hxy-u"
"mon.ta600" = "ta600_tavg-u-hxy-u"
"mon.ta500" = "ta500_tavg-500hPa-hxy-u"
"mon.ta400" = "ta400_tavg-u-hxy-u"
"mon.ta300" = "ta300_tavg-u-hxy-u"
"mon.ta250" = "ta250_tavg-u-hxy-u"
"mon.ta200" = "ta200_tavg-200hPa-hxy-u"
"mon.hus1000" = "hus1000_tavg-1000hPa-hxy-u"
"mon.hus925" = "hus925_tavg-925hPa-hxy-u"
"mon.hus850" = "hus850_tavg-850hPa-hxy-u"
"mon.hus700" = "hus700_tavg-700hPa-hxy-u"
"mon.hus600" = "hus600_tavg-u-hxy-u"
"mon.hus500" = "hus500_tavg-500hPa-hxy-u"
"mon.hus400" = "hus400_tavg-u-hxy-u"
"mon.hus300" = "hus300_tavg-u-hxy-u"
"mon.hus250" = "hus250_tavg-u-hxy-u"
"mon.hus200" = "hus200_tavg-200hPa-hxy-u"
"mon.zg1000" = "zg1000_tavg-1000hPa-hxy-u"
"mon.zg925" = "zg925_tavg-925hPa-hxy-u"
"mon.zg850" = "zg850_tavg-850hPa-hxy-u"
"mon.zg700" = "zg700_tavg-700hPa-hxy-u"
"mon.zg600" = "zg600_tavg-u-hxy-u"
"mon.zg500" = "zg500_tavg-500hPa-hxy-u"
"mon.zg400" = "zg400_tavg-u-hxy-u"
"mon.zg300" = "zg300_tavg-u-hxy-u"
"mon.zg250" = "zg250_tavg-u-hxy-u"
"mon.zg200" = "zg200_tavg-200hPa-hxy-u"
"mon.wa1000" = "wa1000_tavg-1000hPa-hxy-u"
"mon.wa925" = "wa925_tavg-925hPa-hxy-u"
"mon.wa850" = "wa850_tavg-850hPa-hxy-u"
"mon.wa700" = "wa700_tavg-700hPa-hxy-u"
"mon.wa600" = "wa600_tavg-u-hxy-u"
"mon.wa500" = "wa500_tavg-500hPa-hxy-u"
"mon.wa400" = "wa400_tavg-u-hxy-u"
"mon.wa300" = "wa300_tavg-u-hxy-u"
"mon.wa250" = "wa250_tavg-u-hxy-u"
"mon.wa200" = "wa200_tavg-200hPa-hxy-u"
"mon.ua50m" = "ua50m_tavg-u-hxy-u"
"mon.ua100m" = "ua100m_tavg-h100m-hxy-u"
"mon.ua150m" = "ua150m_tavg-u-hxy-u"
"mon.va50m" = "va50m_tavg-u-hxy-u"
"mon.va100m" = "va100m_tavg-h100m-hxy-u"
"mon.va150m" = "va150m_tavg-u-hxy-u"
"mon.ta50m" = "ta50m_tavg-u-hxy-u"
"mon.hus50m" = "hus50m_tavg-u-hxy-u"
"mon.evspsblpot" = "evspsblpot_tavg-u-hxy-lnd"
"mon.wsgsmax" = "wsgsmax_tmax-h10m-hxy-u"
"mon.clh" = "clh_tavg-u-hxy-u"
"mon.clm" = "clm_tavg-u-hxy-u"
"mon.cll" = "cll_tavg-u-hxy-u"
"mon.rsdscs" = "rsdscs_tavg-u-hxy-u"
"mon.rldscs" = "rldscs_tavg-u-hxy-u"
"mon.rsuscs" = "rsuscs_tavg-u-hxy-u"
"mon.rluscs" = "rluscs_tavg-u-hxy-u"
"mon.rsutcs" = "rsutcs_tavg-u-hxy-u"
"mon.rlutcs" = "rlutcs_tavg-u-hxy-u"
"mon.z0" = "z0_tavg-u-hxy-u"
"mon.cape" = "cape_tavg-u-hxy-u"
"mon.li" = "li_tavg-u-hxy-u"
"mon.cin" = "cin_tavg-u-hxy-u"
"mon.capemax" = "capemax_tmax-u-hxy-u"
"mon.limax" = "limax_tmax-u-hxy-u"
"mon.cinmax" = "cinmax_tmax-u-hxy-u"
"mon.od550aer" = "od550aer_tavg-u-hxy-u"
"mon.ua150" = "ua150_tavg-u-hxy-u"
"mon.ua100" = "ua100_tavg-100hPa-hxy-u"
"mon.ua70" = "ua70_tavg-u-hxy-u"
"mon.ua50" = "ua50_tavg-u-hxy-u"
"mon.ua30" = "ua30_tavg-u-hxy-u"
"mon.ua20" = "ua20_tavg-u-hxy-u"
"mon.ua10" = "ua10_tavg-10hPa-hxy-u"
"mon.va150" = "va150_tavg-u-hxy-u"
"mon.va100" = "va100_tavg-100hPa-hxy-u"
"mon.va70" = "va70_tavg-u-hxy-u"
"mon.va50" = "va50_tavg-u-hxy-u"
"mon.va30" = "va30_tavg-u-hxy-u"
"mon.va20" = "va20_tavg-u-hxy-u"
"mon.va10" = "va10_tavg-10hPa-hxy-u"
"mon.ta150" = "ta150_tavg-u-hxy-u"
"mon.ta100" = "ta100_tavg-100hPa-hxy-u"
"mon.ta70" = "ta70_tavg-u-hxy-u"
"mon.ta50" = "ta50_tavg-u-hxy-u"
"mon.ta30" = "ta30_tavg-u-hxy-u"
"mon.ta20" = "ta20_tavg-u-hxy-u"
"mon.ta10" = "ta10_tavg-10hPa-hxy-u"
"mon.hus150" = "hus150_tavg-u-hxy-u"
"mon.hus100" = "hus100_tavg-100hPa-hxy-u"
"mon.hus70" = "hus70_tavg-u-hxy-u"
"mon.hus50" = "hus50_tavg-u-hxy-u"
"mon.hus30" = "hus30_tavg-u-hxy-u"
"mon.hus20" = "hus20_tavg-u-hxy-u"
"mon.hus10" = "hus10_tavg-10hPa-hxy-u"
"mon.zg150" = "zg150_tavg-u-hxy-u"
"mon.zg100" = "zg100_tavg-100hPa-hxy-u"
"mon.zg70" = "zg70_tavg-u-hxy-u"
"mon.zg50" = "zg50_tavg-u-hxy-u"
"mon.zg30" = "zg30_tavg-u-hxy-u"
"mon.zg20" = "zg20_tavg-u-hxy-u"
"mon.zg10" = "zg10_tavg-10hPa-hxy-u"
"mon.wa150" = "wa150_tavg-u-hxy-u"
"mon.wa100" = "wa100_tavg-100hPa-hxy-u"
"mon.wa70" = "wa70_tavg-u-hxy-u"
"mon.wa50" = "wa50_tavg-u-hxy-u"
"mon.wa30" = "wa30_tavg-u-hxy-u"
"mon.wa20" = "wa20_tavg-u-hxy-u"
"mon.wa10" = "wa10_tavg-10hPa-hxy-u"
"mon.ua750" = "ua750_tavg-u-hxy-u"
"mon.va750" = "va750_tavg-u-hxy-u"
"mon.ta750" = "ta750_tavg-u-hxy-u"
"mon.hus750" = "hus750_tavg-u-hxy-u"
"mon.zg750" = "zg750_tavg-u-hxy-u"
"mon.wa750" = "wa750_tavg-u-hxy-u"
"mon.ua200m" = "ua200m_tavg-u-hxy-u"
"mon.ua250m" = "ua250m_tavg-u-hxy-u"
"mon.ua300m" = "ua300m_tavg-u-hxy-u"
"mon.va200m" = "va200m_tavg-u-hxy-u"
"mon.va250m" = "va250m_tavg-u-hxy-u"
"mon.va300m" = "va300m_tavg-u-hxy-u"
"mon.thetao" = "thetao_tavg-ol-hxy-sea"
"mon.so" = "so_tavg-ol-hxy-sea"
"mon.uo" = "uo_tavg-ol-hxy-u"
"mon.vo" = "vo_tavg-ol-hxy-u"
"mon.zos" = "zos_tavg-u-hxy-sea"
"mon.tos" = "tos_tavg-u-hxy-sea"
"mon.sos" = "sos_tavg-u-hxy-sea"
"mon.mlotst" = "mlotst_tavg-u-hxy-sea"
"mon.wo" = "wo_tavg-ol-hxy-sea"
"mon.rhop" = "rhop_tavg-u-hxy-sea"
"mon.hfds" = "hfds_tavg-u-hxy-sea"
"mon.hfcorr" = "hfcorr_tavg-u-hxy-sea"
"mon.rsntds" = "rsntds_tavg-u-hxy-sea"
"mon.tauuo" = "tauuo_tavg-u-hxy-sea"
"mon.tauvo" = "tauvo_tavg-u-hxy-sea"
"mon.wfo" = "wfo_tavg-u-hxy-sea"
"mon.friver" = "friver_tavg-u-hxy-sea"
"mon.wfonocorr" = "wfonocorr_tavg-u-hxy-sea"
"mon.tob" = "tob_tavg-u-hxy-sea"
"mon.siconc" = "siconc_tavg-u-hxy-sea"
"mon.sithick" = "sithick_tavg-u-hxy-si"
"mon.sitemptop" = "sitemptop_tavg-u-hxy-si"
"day.tas" = "tas_tavg-h2m-hxy-u"
"day.tasmax" = "tasmax_tmax-h2m-hxy-u"
"day.tasmin" = "tasmin_tmin-h2m-hxy-u"
"day.pr" = "pr_tavg-u-hxy-u"
"day.evspsbl" = "evspsbl_tavg-u-hxy-u"
"day.huss" = "huss_tavg-h2m-hxy-u"
"day.hurs" = "hurs_tavg-h2m-hxy-u"
"day.ps" = "ps_tavg-u-hxy-u"
"day.psl" = "psl_tavg-u-hxy-u"
"day.sfcWind" = "sfcWind_tavg-h10m-hxy-u"
"day.uas" = "uas_tavg-h10m-hxy-u"
"day.vas" = "vas_tavg-h10m-hxy-u"
"day.clt" = "clt_tavg-u-hxy-u"
"day.rsds" = "rsds_tavg-u-hxy-u"
"day.rlds" = "rlds_tavg-u-hxy-u"
"day.ts" = "ts_tavg-u-hxy-u"
"day.tsl" = "tsl_tavg-sl-hxy-lnd"
"day.prc" = "prc_tavg-u-hxy-u"
"day.prhmax" = "prhmax_tmax-u-hxy-u"
"day.prsn" = "prsn_tavg-u-hxy-u"
"day.mrros" = "mrros_tavg-u-hxy-lnd"
"day.mrro" = "mrro_tavg-u-hxy-lnd"
"day.snm" = "snm_tavg-u-hxy-lnd"
"day.tauu" = "tauu_tavg-u-hxy-u"
"day.tauv" = "tauv_tavg-u-hxy-u"
"day.sfcWindmax" = "sfcWindmax_tmax-h10m-hxy-u"
"day.sund" = "sund_tsum-u-hxy-u"
"day.rsdsdir" = "rsdsdir_tavg-u-hxy-u"
"day.rsus" = "rsus_tavg-u-hxy-u"
"day.rlus" = "rlus_tavg-u-hxy-u"
"day.rlut" = "rlut_tavg-u-hxy-u"
"day.rsdt" = "rsdt_tavg-u-hxy-u"
"day.rsut" = "rsut_tavg-u-hxy-u"
"day.hfls" = "hfls_tavg-u-hxy-u"
"day.hfss" = "hfss_tavg-u-hxy-u"
"day.mrfso" = "mrfso_tavg-u-hxy-lnd"
"day.mrfsos" = "mrfsos_tavg-u-hxy-lnd"
"day.mrsfl" = "mrsfl_tavg-sl-hxy-lnd"
"day.mrso" = "mrso_tavg-u-hxy-lnd"
"day.mrsos" = "mrsos_tavg-u-hxy-lnd"
"day.mrsol" = "mrsol_tavg-sl-hxy-lnd"
"day.snw" = "snw_tavg-u-hxy-lnd"
"day.snc" = "snc_tavg-u-hxy-u"
"day.snd" = "snd_tavg-u-hxy-lnd"
"day.siconca" = "siconca_tavg-u-hxy-u"
"day.zmla" = "zmla_tavg-u-hxy-u"
"day.prw" = "prw_tavg-u-hxy-u"
"day.clwvi" = "clwvi_tavg-u-hxy-u"
"day.clivi" = "clivi_tavg-u-hxy-u"
"day.ua1000" = "ua1000_tavg-1000hPa-hxy-u"
"day.ua925" = "ua925_tavg-925hPa-hxy-u"
"day.ua850" = "ua850_tavg-850hPa-hxy-u"
"day.ua700" = "ua700_tavg-700hPa-hxy-u"
"day.ua600" = "ua600_tavg-u-hxy-u"
"day.ua500" = "ua500_tavg-500hPa-hxy-u"
"day.ua400" = "ua400_tavg-u-hxy-u"
"day.ua300" = "ua300_tavg-u-hxy-u"
"day.ua250" = "ua250_tavg-u-hxy-u"
"day.ua200" = "ua200_tavg-200hPa-hxy-u"
"day.va1000" = "va1000_tavg-1000hPa-hxy-u"
"day.va925" = "va925_tavg-925hPa-hxy-u"
"day.va850" = "va850_tavg-850hPa-hxy-u"
"day.va700" = "va700_tavg-700hPa-hxy-u"
"day.va600" = "va600_tavg-u-hxy-u"
"day.va500" = "va500_tavg-500hPa-hxy-u"
"day.va400" = "va400_tavg-u-hxy-u"
"day.va300" = "va300_tavg-u-hxy-u"
"day.va250" = "va250_tavg-u-hxy-u"
"day.va200" = "va200_tavg-200hPa-hxy-u"
"day.ta1000" = "ta1000_tavg-1000hPa-hxy-u"
"day.ta925" = "ta925_tavg-925hPa-hxy-u"
"day.ta850" = "ta850_tavg-850hPa-hxy-u"
"day.ta700" = "ta700_tavg-700hPa-hxy-u"
"day.ta600" = "ta600_tavg-u-hxy-u"
"day.ta500" = "ta500_tavg-500hPa-hxy-u"
"day.ta400" = "ta400_tavg-u-hxy-u"
"day.ta300" = "ta300_tavg-u-hxy-u"
"day.ta250" = "ta250_tavg-u-hxy-u"
"day.ta200" = "ta200_tavg-200hPa-hxy-u"
"day.hus1000" = "hus1000_tavg-1000hPa-hxy-u"
"day.hus925" = "hus925_tavg-925hPa-hxy-u"
"day.hus850" = "hus850_tavg-850hPa-hxy-u"
"day.hus700" = "hus700_tavg-700hPa-hxy-u"
"day.hus600" = "hus600_tavg-u-hxy-u"
"day.hus500" = "hus500_tavg-500hPa-hxy-u"
"day.hus400" = "hus400_tavg-u-hxy-u"
"day.hus300" = "hus300_tavg-u-hxy-u"
"day.hus250" = "hus250_tavg-u-hxy-u"
"day.hus200" = "hus200_tavg-200hPa-hxy-u"
"day.zg1000" = "zg1000_tavg-1000hPa-hxy-u"
"day.zg925" = "zg925_tavg-925hPa-hxy-u"
"day.zg850" = "zg850_tavg-850hPa-hxy-u"
"day.zg700" = "zg700_tavg-700hPa-hxy-u"
"day.zg600" = "zg600_tavg-u-hxy-u"
"day.zg500" = "zg500_tavg-500hPa-hxy-u"
"day.zg400" = "zg400_tavg-u-hxy-u"
"day.zg300" = "zg300_tavg-u-hxy-u"
"day.zg250" = "zg250_tavg-u-hxy-u"
"day.zg200" = "zg200_tavg-200hPa-hxy-u"
"day.wa1000" = "wa1000_tavg-1000hPa-hxy-u"
"day.wa925" = "wa925_tavg-925hPa-hxy-u"
"day.wa850" = "wa850_tavg-850hPa-hxy-u"
"day.wa700" = "wa700_tavg-700hPa-hxy-u"
"day.wa600" = "wa600_tavg-u-hxy-u"
"day.wa500" = "wa500_tavg-500hPa-hxy-u"
"day.wa400" = "wa400_tavg-u-hxy-u"
"day.wa300" = "wa300_tavg-u-hxy-u"
"day.wa250" = "wa250_tavg-u-hxy-u"
"day.wa200" = "wa200_tavg-200hPa-hxy-u"
"day.ua50m" = "ua50m_tavg-u-hxy-u"
"day.ua100m" = "ua100m_tavg-h100m-hxy-u"
"day.ua150m" = "ua150m_tavg-u-hxy-u"
"day.va50m" = "va50m_tavg-u-hxy-u"
"day.va100m" = "va100m_tavg-h100m-hxy-u"
"day.va150m" = "va150m_tavg-u-hxy-u"
"day.ta50m" = "ta50m_tavg-u-hxy-u"
"day.hus50m" = "hus50m_tavg-u-hxy-u"
"day.evspsblpot" = "evspsblpot_tavg-u-hxy-lnd"
"day.wsgsmax" = "wsgsmax_tmax-h10m-hxy-u"
"day.clh" = "clh_tavg-u-hxy-u"
"day.clm" = "clm_tavg-u-hxy-u"
"day.cll" = "cll_tavg-u-hxy-u"
"day.rsdscs" = "rsdscs_tavg-u-hxy-u"
"day.rldscs" = "rldscs_tavg-u-hxy-u"
"day.rsuscs" = "rsuscs_tavg-u-hxy-u"
"day.rluscs" = "rluscs_tavg-u-hxy-u"
"day.rsutcs" = "rsutcs_tavg-u-hxy-u"
"day.rlutcs" = "rlutcs_tavg-u-hxy-u"
"day.z0" = "z0_tavg-u-hxy-u"
"day.cape" = "cape_tavg-u-hxy-u"
"day.li" = "li_tavg-u-hxy-u"
"day.cin" = "cin_tavg-u-hxy-u"
"day.capemax" = "capemax_tmax-u-hxy-u"
"day.limax" = "limax_tmax-u-hxy-u"
"day.cinmax" = "cinmax_tmax-u-hxy-u"
"day.ua150" = "ua150_tavg-u-hxy-u"
"day.ua100" = "ua100_tavg-100hPa-hxy-u"
"day.ua70" = "ua70_tavg-u-hxy-u"
"day.ua50" = "ua50_tavg-u-hxy-u"
"day.ua30" = "ua30_tavg-u-hxy-u"
"day.ua20" = "ua20_tavg-u-hxy-u"
"day.ua10" = "ua10_tavg-10hPa-hxy-u"
"day.va150" = "va150_tavg-u-hxy-u"
"day.va100" = "va100_tavg-100hPa-hxy-u"
"day.va70" = "va70_tavg-u-hxy-u"
"day.va50" = "va50_tavg-u-hxy-u"
"day.va30" = "va30_tavg-u-hxy-u"
"day.va20" = "va20_tavg-u-hxy-u"
"day.va10" = "va10_tavg-10hPa-hxy-u"
"day.ta150" = "ta150_tavg-u-hxy-u"
"day.ta100" = "ta100_tavg-100hPa-hxy-u"
"day.ta70" = "ta70_tavg-u-hxy-u"
"day.ta50" = "ta50_tavg-u-hxy-u"
"day.ta30" = "ta30_tavg-u-hxy-u"
"day.ta20" = "ta20_tavg-u-hxy-u"
"day.ta10" = "ta10_tavg-10hPa-hxy-u"
"day.hus150" = "hus150_tavg-u-hxy-u"
"day.hus100" = "hus100_tavg-100hPa-hxy-u"
"day.hus70" = "hus70_tavg-u-hxy-u"
"day.hus50" = "hus50_tavg-u-hxy-u"
"day.hus30" = "hus30_tavg-u-hxy-u"
"day.hus20" = "hus20_tavg-u-hxy-u"
"day.hus10" = "hus10_tavg-10hPa-hxy-u"
"day.zg150" = "zg150_tavg-u-hxy-u"
"day.zg100" = "zg100_tavg-100hPa-hxy-u"
"day.zg70" = "zg70_tavg-u-hxy-u"
"day.zg50" = "zg50_tavg-u-hxy-u"
"day.zg30" = "zg30_tavg-u-hxy-u"
"day.zg20" = "zg20_tavg-u-hxy-u"
"day.zg10" = "zg10_tavg-10hPa-hxy-u"
"day.wa150" = "wa150_tavg-u-hxy-u"
"day.wa100" = "wa100_tavg-100hPa-hxy-u"
"day.wa70" = "wa70_tavg-u-hxy-u"
"day.wa50" = "wa50_tavg-u-hxy-u"
"day.wa30" = "wa30_tavg-u-hxy-u"
"day.wa20" = "wa20_tavg-u-hxy-u"
"day.wa10" = "wa10_tavg-10hPa-hxy-u"
"day.ua750" = "ua750_tavg-u-hxy-u"
"day.va750" = "va750_tavg-u-hxy-u"
"day.ta750" = "ta750_tavg-u-hxy-u"
"day.hus750" = "hus750_tavg-u-hxy-u"
"day.zg750" = "zg750_tavg-u-hxy-u"
"day.wa750" = "wa750_tavg-u-hxy-u"
"day.ua200m" = "ua200m_tavg-u-hxy-u"
"day.ua250m" = "ua250m_tavg-u-hxy-u"
"day.ua300m" = "ua300m_tavg-u-hxy-u"
"day.va200m" = "va200m_tavg-u-hxy-u"
"day.va250m" = "va250m_tavg-u-hxy-u"
"day.va300m" = "va300m_tavg-u-hxy-u"
"day.zos" = "zos_tavg-u-hxy-sea"
"day.tos" = "tos_tavg-u-hxy-sea"
"day.sos" = "sos_tavg-u-hxy-sea"
"day.mlotst" = "mlotst_tavg-u-hxy-sea"
"day.thetao" = "thetao_tavg-ol-hxy-sea"
"day.hfds" = "hfds_tavg-u-hxy-sea"
"day.hfcorr" = "hfcorr_tavg-u-hxy-sea"
"day.rsntds" = "rsntds_tavg-u-hxy-sea"
"day.tauuo" = "tauuo_tavg-u-hxy-sea"
"day.tauvo" = "tauvo_tavg-u-hxy-sea"
"day.uos" = "uos_tavg-u-hxy-sea"
"day.vos" = "vos_tavg-u-hxy-sea"
"day.wfo" = "wfo_tavg-u-hxy-sea"
"day.friver" = "friver_tavg-u-hxy-sea"
"day.wfonocorr" = "wfonocorr_tavg-u-hxy-sea"
"day.so" = "so_tavg-ol-hxy-sea"
"day.uo" = "uo_tavg-ol-hxy-sea"
"day.vo" = "vo_tavg-ol-hxy-sea"
"day.wo" = "wo_tavg-ol-hxy-sea"
"day.rhop" = "rhop_tavg-u-hxy-sea"
"day.difvho" = "difvho_tclm-ol-hxy-sea"
"day.tob" = "tob_tavg-u-hxy-sea"
"day.siconc" = "siconc_tavg-u-hxy-sea"
"day.sithick" = "sithick_tavg-u-hxy-si"
"day.sitemptop" = "sitemptop_tavg-u-hxy-si"
"6hr.tsl" = "tsl_tpt-sl-hxy-lnd"
"6hr.mrros" = "mrros_tavg-u-hxy-lnd"
"6hr.mrro" = "mrro_tavg-u-hxy-lnd"
"6hr.snm" = "snm_tavg-u-hxy-lnd"
"6hr.mrfso" = "mrfso_tpt-u-hxy-lnd"
"6hr.mrsfl" = "mrsfl_tpt-sl-hxy-lnd"
"6hr.mrso" = "mrso_tpt-u-hxy-lnd"
"6hr.mrsol" = "mrsol_tpt-sl-hxy-lnd"
"6hr.snw" = "snw_tpt-u-hxy-lnd"
"6hr.snc" = "snc_tpt-u-hxy-u"
"6hr.snd" = "snd_tpt-u-hxy-lnd"
"6hr.ua1000" = "ua1000_tpt-1000hPa-hxy-u"
"6hr.ua925" = "ua925_tpt-925hPa-hxy-u"
"6hr.ua850" = "ua850_tpt-850hPa-hxy-u"
"6hr.ua700" = "ua700_tpt-700hPa-hxy-u"
"6hr.ua600" = "ua600_tpt-u-hxy-u"
"6hr.ua500" = "ua500_tpt-500hPa-hxy-u"
"6hr.ua400" = "ua400_tpt-u-hxy-u"
"6hr.ua300" = "ua300_tpt-u-hxy-u"
"6hr.ua250" = "ua250_tpt-u-hxy-u"
"6hr.ua200" = "ua200_tpt-200hPa-hxy-u"
"6hr.va1000" = "va1000_tpt-1000hPa-hxy-u"
"6hr.va925" = "va925_tpt-925hPa-hxy-u"
"6hr.va850" = "va850_tpt-850hPa-hxy-u"
"6hr.va700" = "va700_tpt-700hPa-hxy-u"
"6hr.va600" = "va600_tpt-u-hxy-u"
"6hr.va500" = "va500_tpt-500hPa-hxy-u"
"6hr.va400" = "va400_tpt-u-hxy-u"
"6hr.va300" = "va300_tpt-u-hxy-u"
"6hr.va250" = "va250_tpt-u-hxy-u"
"6hr.va200" = "va200_tpt-200hPa-hxy-u"
"6hr.ta1000" = "ta1000_tpt-1000hPa-hxy-u"
"6hr.ta925" = "ta925_tpt-925hPa-hxy-u"
"6hr.ta850" = "ta850_tpt-850hPa-hxy-u"
"6hr.ta700" = "ta700_tpt-700hPa-hxy-u"
"6hr.ta600" = "ta600_tpt-u-hxy-u"
"6hr.ta500" = "ta500_tpt-500hPa-hxy-u"
"6hr.ta400" = "ta400_tpt-u-hxy-u"
"6hr.ta300" = "ta300_tpt-u-hxy-u"
"6hr.ta250" = "ta250_tpt-u-hxy-u"
"6hr.ta200" = "ta200_tpt-200hPa-hxy-u"
"6hr.hus1000" = "hus1000_tpt-1000hPa-hxy-u"
"6hr.hus925" = "hus925_tpt-925hPa-hxy-u"
"6hr.hus850" = "hus850_tpt-850hPa-hxy-u"
"6hr.hus700" = "hus700_tpt-700hPa-hxy-u"
"6hr.hus600" = "hus600_tpt-u-hxy-u"
"6hr.hus500" = "hus500_tpt-500hPa-hxy-u"
"6hr.hus400" = "hus400_tpt-u-hxy-u"
"6hr.hus300" = "hus300_tpt-u-hxy-u"
"6hr.hus250" = "hus250_tpt-u-hxy-u"
"6hr.hus200" = "hus200_tpt-200hPa-hxy-u"
"6hr.zg1000" = "zg1000_tpt-1000hPa-hxy-u"
"6hr.zg925" = "zg925_tpt-925hPa-hxy-u"
"6hr.zg850" = "zg850_tpt-850hPa-hxy-u"
"6hr.zg700" = "zg700_tpt-700hPa-hxy-u"
"6hr.zg600" = "zg600_tpt-u-hxy-u"
"6hr.zg500" = "zg500_tpt-500hPa-hxy-u"
"6hr.zg400" = "zg400_tpt-u-hxy-u"
"6hr.zg300" = "zg300_tpt-u-hxy-u"
"6hr.zg250" = "zg250_tpt-u-hxy-u"
"6hr.zg200" = "zg200_tpt-200hPa-hxy-u"
"6hr.wa1000" = "wa1000_tpt-1000hPa-hxy-u"
"6hr.wa925" = "wa925_tpt-925hPa-hxy-u"
"6hr.wa850" = "wa850_tpt-850hPa-hxy-u"
"6hr.wa700" = "wa700_tpt-700hPa-hxy-u"
"6hr.wa600" = "wa600_tpt-u-hxy-u"
"6hr.wa500" = "wa500_tpt-500hPa-hxy-u"
"6hr.wa400" = "wa400_tpt-u-hxy-u"
"6hr.wa300" = "wa300_tpt-u-hxy-u"
"6hr.wa250" = "wa250_tpt-u-hxy-u"
"6hr.wa200" = "wa200_tpt-200hPa-hxy-u"
"6hr.clh" = "clh_tavg-u-hxy-u"
"6hr.clm" = "clm_tavg-u-hxy-u"
"6hr.cll" = "cll_tavg-u-hxy-u"
"6hr.rsdscs" = "rsdscs_tavg-u-hxy-u"
"6hr.rldscs" = "rldscs_tavg-u-hxy-u"
"6hr.rsuscs" = "rsuscs_tavg-u-hxy-u"
"6hr.rluscs" = "rluscs_tavg-u-hxy-u"
"6hr.rsutcs" = "rsutcs_tavg-u-hxy-u"
"6hr.rlutcs" = "rlutcs_tavg-u-hxy-u"
"6hr.ua150" = "ua150_tpt-u-hxy-u"
"6hr.ua100" = "ua100_tpt-100hPa-hxy-u"
"6hr.ua70" = "ua70_tpt-u-hxy-u"
"6hr.ua50" = "ua50_tpt-u-hxy-u"
"6hr.ua30" = "ua30_tpt-u-hxy-u"
"6hr.ua20" = "ua20_tpt-u-hxy-u"
"6hr.ua10" = "ua10_tpt-10hPa-hxy-u"
"6hr.va150" = "va150_tpt-u-hxy-u"
"6hr.va100" = "va100_tpt-100hPa-hxy-u"
"6hr.va70" = "va70_tpt-u-hxy-u"
"6hr.va50" = "va50_tpt-u-hxy-u"
"6hr.va30" = "va30_tpt-u-hxy-u"
"6hr.va20" = "va20_tpt-u-hxy-u"
"6hr.va10" = "va10_tpt-10hPa-hxy-u"
"6hr.ta150" = "ta150_tpt-u-hxy-u"
"6hr.ta100" = "ta100_tpt-100hPa-hxy-u"
"6hr.ta70" = "ta70_tpt-u-hxy-u"
"6hr.ta50" = "ta50_tpt-u-hxy-u"
"6hr.ta30" = "ta30_tpt-u-hxy-u"
"6hr.ta20" = "ta20_tpt-u-hxy-u"
"6hr.ta10" = "ta10_tpt-10hPa-hxy-u"
"6hr.hus150" = "hus150_tpt-u-hxy-u"
"6hr.hus100" = "hus100_tpt-100hPa-hxy-u"
"6hr.hus70" = "hus70_tpt-u-hxy-u"
"6hr.hus50" = "hus50_tpt-u-hxy-u"
"6hr.hus30" = "hus30_tpt-u-hxy-u"
"6hr.hus20" = "hus20_tpt-u-hxy-u"
"6hr.hus10" = "hus10_tpt-10hPa-hxy-u"
"6hr.zg150" = "zg150_tpt-u-hxy-u"
"6hr.zg100" = "zg100_tpt-100hPa-hxy-u"
"6hr.zg70" = "zg70_tpt-u-hxy-u"
"6hr.zg50" = "zg50_tpt-u-hxy-u"
"6hr.zg30" = "zg30_tpt-u-hxy-u"
"6hr.zg20" = "zg20_tpt-u-hxy-u"
"6hr.zg10" = "zg10_tpt-10hPa-hxy-u"
"6hr.wa150" = "wa150_tpt-u-hxy-u"
"6hr.wa100" = "wa100_tpt-100hPa-hxy-u"
"6hr.wa70" = "wa70_tpt-u-hxy-u"
"6hr.wa50" = "wa50_tpt-u-hxy-u"
"6hr.wa30" = "wa30_tpt-u-hxy-u"
"6hr.wa20" = "wa20_tpt-u-hxy-u"
"6hr.wa10" = "wa10_tpt-10hPa-hxy-u"
"6hr.ua750" = "ua750_tpt-u-hxy-u"
"6hr.va750" = "va750_tpt-u-hxy-u"
"6hr.ta750" = "ta750_tpt-u-hxy-u"
"6hr.hus750" = "hus750_tpt-u-hxy-u"
"6hr.zg750" = "zg750_tpt-u-hxy-u"
"6hr.wa750" = "wa750_tpt-u-hxy-u"
"1hr.tas" = "tas_tpt-h2m-hxy-u"
"1hr.pr" = "pr_tavg-u-hxy-u"
"1hr.evspsbl" = "evspsbl_tavg-u-hxy-u"
"1hr.huss" = "huss_tpt-h2m-hxy-u"
"1hr.hurs" = "hurs_tpt-h2m-hxy-u"
"1hr.ps" = "ps_tpt-u-hxy-u"
"1hr.psl" = "psl_tpt-u-hxy-u"
"1hr.sfcWind" = "sfcWind_tpt-h10m-hxy-u"
"1hr.uas" = "uas_tpt-h10m-hxy-u"
"1hr.vas" = "vas_tpt-h10m-hxy-u"
"1hr.clt" = "clt_tavg-u-hxy-u"
"1hr.rsds" = "rsds_tavg-u-hxy-u"
"1hr.rlds" = "rlds_tavg-u-hxy-u"
"1hr.ts" = "ts_tpt-u-hxy-u"
"1hr.prc" = "prc_tavg-u-hxy-u"
"1hr.prsn" = "prsn_tavg-u-hxy-u"
"1hr.tauu" = "tauu_tavg-u-hxy-u"
"1hr.tauv" = "tauv_tavg-u-hxy-u"
"1hr.rsdsdir" = "rsdsdir_tavg-u-hxy-u"
"1hr.rsus" = "rsus_tavg-u-hxy-u"
"1hr.rlus" = "rlus_tavg-u-hxy-u"
"1hr.rlut" = "rlut_tavg-u-hxy-u"
"1hr.rsdt" = "rsdt_tavg-u-hxy-u"
"1hr.rsut" = "rsut_tavg-u-hxy-u"
"1hr.hfls" = "hfls_tavg-u-hxy-u"
"1hr.hfss" = "hfss_tavg-u-hxy-u"
"1hr.mrfsos" = "mrfsos_tpt-u-hxy-lnd"
"1hr.mrsos" = "mrsos_tpt-u-hxy-lnd"
"1hr.zmla" = "zmla_tpt-u-hxy-u"
"1hr.prw" = "prw_tpt-u-hxy-u"
"1hr.clwvi" = "clwvi_tpt-u-hxy-u"
"1hr.clivi" = "clivi_tpt-u-hxy-u"
"1hr.ua50m" = "ua50m_tpt-u-hxy-u"
"1hr.ua100m" = "ua100m_tpt-h100m-hxy-u"
"1hr.ua150m" = "ua150m_tpt-u-hxy-u"
"1hr.va50m" = "va50m_tpt-u-hxy-u"
"1hr.va100m" = "va100m_tpt-h100m-hxy-u"
"1hr.va150m" = "va150m_tpt-u-hxy-u"
"1hr.ta50m" = "ta50m_tpt-u-hxy-u"
"1hr.hus50m" = "hus50m_tpt-u-hxy-u"
"1hr.evspsblpot" = "evspsblpot_tavg-u-hxy-lnd"
"1hr.cape" = "cape_tpt-u-hxy-u"
"1hr.li" = "li_tpt-u-hxy-u"
"1hr.cin" = "cin_tpt-u-hxy-u"
"1hr.ua200m" = "ua200m_tpt-u-hxy-u"
"1hr.ua250m" = "ua250m_tpt-u-hxy-u"
"1hr.ua300m" = "ua300m_tpt-u-hxy-u"
"1hr.va200m" = "va200m_tpt-u-hxy-u"
"1hr.va250m" = "va250m_tpt-u-hxy-u"
"1hr.va300m" = "va300m_tpt-u-hxy-u"
"1hr.zos" = "zos_tavg-u-hxy-sea"
"1hr.tos" = "tos_tpt-u-hxy-sea"

[jesusff]

Thank you, Martin. Great work!

Some variables differ in terms of the masking part of the branding_label, coming from slight differences in the cell_methods

the examples you provide refer to ocean variables, which are still under development (#33). I see no problem here in adapting our cell methods to those in CMIP7 DR

Not all CORDEX-CMIP6 variables exist in the CMIP7 / the variable registry

defining new variables for a project other than CMIP7 was not in the near future plans of the WCRP variable registry (WCRP-CMIP/Variable-Registry#33 (comment)). However, if having the variables in the registry is the only way forward at the moment to get the CORDEX-CMIP6 data on ESGF, we should try to have the extra variables in. Or at least have them in a branch ready to be merged.

ping @taylor13

There are differences between CORDEX-CMIP6 and CMIP7 / variable registry in the important attributes positive and standard_name for one and the same variable.

We should try to avoid this as well. They probably come from differences between CMIP6 and CMIP7? We essentially borrowed the attributes from CMIP6

ping @larsbuntemeyer

[taylor13]

Thanks for all this work!

We should try to avoid this as well. They probably come from differences between CMIP6 and CMIP7? We essentially borrowed the attributes from CMIP6

There have been a number of changes in variable attributes, dimensions, units, and even standard_names between
CMIP6 and CMIP7. We hope to avoid this in the future by maintaining a universal WCRP register of variables. Once established for CMIP7, we can submit CORDEX variables not found in CMIP7 to be added. There may be changes needed to some names/attributes of current CORDEX variables so that they are consistent with the register in future phases.

I'm surprised that there are differences in the "positive" attribute since its direction is almost always tied to the standard_name. Can you provide examples of inconsistencies?

[larsbuntemeyer]

Thanks Martin! Yes, we of course inherit most of the meta data from CMIP6, so if there are inconsistencies with current CMIP7 meta data, that is probably expected, however:

Not all vertical axes used in CORDEX-CMIP6 are already supported by the CMIP branded variable mapper that is used to generate the branding_label out of the cell_methods and dimensions (and have therefore likey be registered with the variable registry when that is possible).

Yes, we define many more (single) pressure and height levels. There is also an issue on how this should be handled in the future, e.g.,

• Open the data request to 3D (spatial) fields in a single file? #76

There are differences between CORDEX-CMIP6 and CMIP7 / variable registry in the important attributes positive and standard_name for one and the same variable.

I'm surprised that there are differences in the "positive" attribute since its direction is almost always tied to the standard_name. Can you provide examples of inconsistencies?

We encountered these inconsistencies when inheriting from CMIP6 cmor tables / data request, e.g.

• positive attribute of upward_air_velocity #47
• positive attribute of upward_air_velocity PCMDI/cmip6-cmor-tables#421

In this case, we defined a clear definition of the positive attribute depending on the standard name here, it's part of our CI in the data request.

The CI also should ensure correct standard names based on latest standard names table.

In cases, we have chosen conflicting standard names, usually this comes from havin had no reference in the CMIP6 data request, see, e.g., my thoughts here

@sol1105 The cmor tables are constructed from our csv cmor table which is the primary source of truth. Might be easier to read that in from the beginnig!

[larsbuntemeyer]

- day.uos
	+ standard_name:
		CC6: surface_eastward_sea_water_velocity
		 C7: surface_sea_water_x_velocity
- day.vos
	+ standard_name:
		CC6: surface_northward_sea_water_velocity
		 C7: surface_sea_water_y_velocity

This inconsistency also relates to not having had a reference in CMIP6. Both choices are valid standard names, however, using eastward, northward instead of x and y terms seemed to be more in line with the choices for the atmospheric surface wind components uas/vas (eastward_wind/northward_wind). This also makes it more clear, that in CORDEX, we provide vector components in the "real world" coordinate system (EPSG:4326), which might differ from the vector component along the grid x-axis of the acutal model output. For example, in the rotated pole CRS, the x/y-axis as defined by CF attributes are the rlon/rlat coordinates, but the atmosheric winds components are given with respect to lon/lat coordinates. See, e.g., the archive specs:

Zonal and meridional winds must be provided as real north- and eastward winds if the RCM uses a
coordinate system/projection that does not coincide with real north- and eastward directions (e.g. the rotated pole, Lambert Conformal,
etc.).

Here i assumed, it's the same for ocen model vector components!

[jesusff]

I would say so, too. @sam-somot ocean currents are de-rotated to be real north and eastward components regardless of the native ocean grid, right?

[sam-somot]

I would say so, too. @sam-somot ocean currents are de-rotated to be real north and eastward components regardless of the native ocean grid, right?

I agree. we should deliver rotated vectors, in real north- and eastward directions.

[larsbuntemeyer]

The horizontal label hxy explicitly mentions regular 2D horizontal grid with longitude and latitude coordinates.
Although this could probably be more precise int terms of referring to a CRS?

[sol1105]

I had updated the gist to remove the vertical information (50m, 150m, ...) from the variable root name:
https://gist.github.com/sol1105/eefe12250e818fc00bf7e34f59c2a7c0

The resulting list is checked in here:
https://github.com/ESGF/cc-plugin-wcrp/blob/master/plugins/cordex_cmip6/resources/mapping_variables.toml

[larsbuntemeyer]

@sol1105 Thanks for taking care of this!