| Variables | Frequency | Aggregation | EUP_WP22 | EUP_WP23 | SPECS_WP6.1 | Available at SYSTEM4 seasonal hindcast | Available at CFS_ v2 reforecast | Available at SPECS | Comments |
| Air temperature | At 7am, 2pm and 9pm (local time) | point | PET | Yes. (6havgd: 2t) | Yes. (6havgd: tmp2m) | Yes. (6havgd: tas) | |||
| Air temperature | Daily | mean | GSS, HI, HyI, HDD, UDIC | AQUATOOL, E-HYPE, CGMS, LPJml, JULES, GUESS, MORDOR , IC3 | VORTEX, ENEA | Yes. (mean2t24) | Yes. (tmp2m) | Yes. (tas) | |
| Air temperature | Daily | minimum | T<-17ºC, CI | CGMS, GUESS, GLAM, AQUATOOL, E-HYPE, MORDOR | ULEEDS | Yes. (mn2t24) | Yes. (tmin) | Yes. (tasmin) | |
| Air temperature | Daily | maximum | HI, FWI | CGMS, GUESS, GLAM, AQUATOOL, E-HYPE, MORDOR | ULEEDS, ENEA | Yes. (mx2t24) | Yes. (tmax) | Yes. (tasmax) | |
| Air temperature | Monthly | mean | IC3 | Yes. (mean2t24) | Yes. (tmp2m) | Yes. (tas) | |||
| Precipitation | Daily | mean | GSP, HyI | AQUATOOL, E-HYPE, CGMS, LPJml, JULES, GUESS, GLAM, MORDOR, IC3 | ULEEDS, IC3 | Yes. (tp) | Yes. (prrate) | Yes. (pr) | |
| Precipitation | Monthly | IC3 | Yes. (tp) | Yes. (prrate) | Yes. (pr) | ||||
| Surface downwelling shortwave flux in air | Daily | mean | CGMS, LPJml, JULES, GLAM, MORDOR | ULEEDS, ENEA, IC3 | Yes. (ssrd) | Yes. (dswsfc) | Yes. (rsds) | ||
| Surface downwelling longwave flux in air | Daily | mean | CGMS, LPJml, JULES | Yes. (strd) | Yes. (dlwsfc) | Yes. (rlds) | |||
| Wind speed (at 10m) | Daily | mean | FWI | CGMS, JULES, AQUATOOL, E-HYPE | VORTEX, ENEA | Yes. (Derived:10u, 10v) | Yes. (Derived:u-wnd10m, v-wnd10m) | Yes. (Derived:uas, vas) | |
| Wind speed (at 10m) | Daily | maximum | GUESS | Yes. (Derived:10u, 10v) | Yes. (Derived:u-wnd10m, v-wnd10m) | Yes. (Derived:uas, vas) | |||
| Wind speed (at 10m) | Monthly | mean | CFU | Yes. (Derived:10u, 10v) | Yes. (Derived:u-wnd10m, v-wnd10m) | Yes. (Derived:uas, vas) | |||
| Geopotential 850mb | Daily | mean | VORTEX, ENEA | Yes. (z850) | Yes. (Derived:z850) | No. (proxy: monthly zg850) | |||
| U-component 850mb Wind speed | Daily | mean | VORTEX | Yes. (u850) | Yes. (wnd850) | No. (Proxy: monthly ua850) | |||
| V-component 850mb Wind speed | Daily | mean | VORTEX | Yes. (v850) | Yes. (wnd850) | No. (Proxy: monthly va850) | |||
| U-component 925mb wind speed | Daily | mean | VORTEX | Yes. (u925) | Yes. (wnd925) | No. | |||
| V-component 925mb wind speed | Daily | mean | VORTEX | Yes. (v925) | Yes. (wnd925) | No. | |||
| Geopotential height at 700hPa | Daily | At 12 UTC | MORDOR | Yes. (Derived:z700) | Yes. (gpm700) | No. | |||
| Geopotential height at 1000hPa | Daily | At 12 UTC | MORDOR | Yes. (Derived:z1000) | Yes. (gpm1000) | No. | |||
| Water Content of Soil Layer | Daily | mean | GUESS | Yes. (Derived: swvl1, swvl2, swvl3, swvl4) | Yes. (Proxy: soilm1, soilm2, soilm3, soilm4) | No. | Total? | ||
| Water Content of Soil Layer | Monthly | GUESS, AQUATOOL | Yes. (Derived: swvl1, swvl2, swvl3, swvl4) | Yes. (Proxy: soilm1, soilm2, soilm3, soilm4) | No. | Monthly? | |||
| Surface Runoff | Daily | mean | AQUATOOL | Yes. (sro) | Yes. (runoff) | No. | |||
| Sea level pressure | Daily | mean | VORTEX | Yes. (msl) | No. (Proxy:pressfc) | Yes. (psl) | |||
| Dew point temperature | Daily | mean | UDIC | E-HYPE | Yes. (2d) | No. (Proxy:q2m, tmp2m, pressfc) | Yes. (tdps) | ||
| Total Runoff | Monthly | AQUATOOL | Yes. (ro) | No. | Yes. (mrro) | Monthly? | |||
| Snowfall flux | Daily | mean | GUESS, E-HYPE | Yes (sf) | No. | Yes. (prsn) | |||
| Water Evaporation from Soil | Daily | GUESS | Yes. (e) | No. | Yes. (Evlwr) | *Find out if they include transpiration | |||
| Water Evaporation from Soil | Monthly | GUESS, AQUATOOL | Yes. (e) | No. | Yes. (Evlwr) | Monthly? | |||
| Sea surface temperature | Daily | mean | VORTEX | Yes. (sst) | No. | No. (Proxy: monthly tos) | |||
| SUB-SURFACE RUNOFF RATE | Daily | mean | AQUATOOL | Yes. (ssrd) | No. | No. | |||
| Geopotential 925mb | Daily | mean | VORTEX, ENEA | Yes. (z925) | No. | No. | |||
| WIND GUST | Daily | maximum | GUESS | Yes. (10fg) | No. | No. | |||
| Precipitation | At noon | Accumulated in the last 24h | FWI | No. | Yes. (prrate) | Yes. (pr) | |||
| Surface air pressure | Daily | mean | JULES, IC3, E-HYPE | No. (Proxy:msl) | Yes. (pressfc) | No. (Proxy:psl) | |||
| Surface air pressure | Monthly | IC3 | No. (Proxy:msl) | Yes. (pressfc) | No. (Proxy:psl) | ||||
| Specific humidity | Daily | mean | JULES, AQUATOOL, GUESS, GLAM | No. | Yes. (q2m) | No. | |||
| Moisture in Upper Portion of Soil Column | Monthly | AQUATOOL | No. (Proxy:swvl1) | Yes. (soilm1) | No. | What does Upper Portion mean?, Monthly? | |||
| Cloud area fraction | Daily | mean | ENEA | No. (Proxy:tcc) | No. | Yes. (clt) | |||
| Total Soil Moisture Content | Daily | mean | AQUATOOL | No. (Proxy:swvl1, swvl2, swvl3, swvl4) | No. (Derived:soilm1, soilm2, soilm3, soilm4) | Yes. (mrso) | |||
| Relative humidity | At 7am, 2pm and 9pm (local time) | point | PET | No. (Proxy:2d) | No. (Proxy:q2m, tmp2m, pressfc) | No. (Proxy:tdps) | |||
| Relative humidity | At noon local standard time or daily mean | point | FWI | No. (Proxy:2d) | No. (Proxy:q2m, tmp2m, pressfc) | No. (Proxy:tdps) | |||
| Relative humidity | Daily | mean | CGMS, E-HYPE | No. (Proxy:2d) | No. (Proxy:q2m, tmp2m, pressfc) | No. (Proxy:tdps) | |||
| Wind speed (at 10m) | At 7am, 2pm and 9pm (local time) | point | PET | No (Proxy:10u, 10v) | No. (Proxy:u-wnd10m, v-wnd10m) | No. (Proxy:uas, vas) | |||
| Wind speed (at 10m) | At noon local standard time | point | FWI | No. (Proxy:10u, 10v) | No. (Proxy:u-wnd10m, v-wnd10m) | No. (Proxy:uas, vas) | |||
| Surface downwelling longwave flux in air | At 7am, 2pm and 9pm (local time) | point | PET | No. (Proxy: daily strd) | No. (6havgd:dlwsfc) | No. | |||
| Surface downwelling shortwave flux in air | At 7am, 2pm and 9pm (local time) | point | PET | No. (Proxy: daily ssrd) | No. (6havgd:dswsfc) | No. | |||
| Cloudiness (in octas) | At 7am, 2pm and 9pm (local time) | point | PET | No. (Proxy:tcc) | No. | No. (Proxy: clt) | |||
| Relative humidity at 300mb | Daily | mean | VORTEX | No. (Proxy:t,q) | No. | No. | |||
| Ozone | Daily | mean | JULES | No. (Proxy:O3. Ozone max mixing ratio / tco3. Total column ozone) | No. | No. | It needs clarification | ||
| Skin temperature | Daily | mean | Meteoswiss | No. | No. (Proxy: tmpsfc) | No. | |||
| Air temperature | At noon local standard time | point | FWI | No. | No. | No. | |||
| 1.5M TEMPERATURE OVER TILES | Daily | mean | GUESS | No. | No. | No. | |||
| 1.5M TEMPERATURE OVER TILES | Daily | maximum | GUESS | No. | No. | No. | |||
| 1.5M TEMPERATURE OVER TILES | Daily | minimum | GUESS | No. | No. | No. | |||
| Precipitation | hourly rate | maximum | GUESS | No. | No. | No. | |||
| 50 METRE WIND U-COMPONENT B GRID | Daily | mean | IC3, MORDOR | No. | No. | No. | |||
| 50 METRE WIND U-COMPONENT B GRID | Monthly | IC3 | No. | No. | No. | ||||
| 50 METRE WIND V-COMPONENT B GRID | Daily | mean | IC3, MORDOR | No. | No. | No. | |||
| 50 METRE WIND V-COMPONENT B GRID | Monthly | IC3 | No. | No. | No. | ||||
| U-component 100 metre wind speed | Daily | mean | VORTEX, ENEA, IC3 | No. | No. | No. | |||
| V-component 100 metre wind speed | Daily | mean | VORTEX, ENEA, IC3 | No. | No. | No. | |||
| Surface snow amount | Daily | mean | GUESS | No. | No. | No. | |||
| Surface moisture | Daily | mean | UDIC | No. | No. | No. | What does it refer to? Humidity? Water in soil? | ||
| CLEAR-SKY (II) DOWN SURFACE SW FLUX | Daily | mean | IC3, GUESS | No. | No. | No. | What does (II) refer to? | ||
| CLEAR-SKY (II) DOWN SURFACE SW FLUX | Monthly | IC3 | No. | No. | No. | ||||
| Water sublimation flux | Daily | mean | E-HYPE | No. | No. | No. | |||
| 1.5M SPECIFIC HUMIDITY OVER TILES | Daily | mean | GUESS | No. | No. | No. | |||
| GRIDBOX OUTFLOW | Daily | mean | Metoffice | No. | No. | No. | This variable needs clarification | ||
| NET PRIMARY PRODUCTIVITY | Daily | mean | Metoffice | No. | No. | No. | What does it mean? | ||
| NET PRIMARY PRODUCTIVITY ON PFTS | Daily | mean | Metoffice | No. | No. | No. | What does it mean? | ||
| NET DOWN SURFACE LW RAD FLUX (used for rlus) | Daily | mean | JULES | No. | No. | No. | |||
| DIFFUSE FLUX | Daily | mean | JULES | No. | No. | No. | |||
| CANOPY THROUGHFALL RATE | Daily | mean | AQUATOOL | No. | No. | No. | |||
| Evaporation from Canopy | Daily | mean | AQUATOOL | No. | No. | No. | |||
| TRANSPIRATION+SOIL EVP ON TILES | Daily | mean | AQUATOOL | No. | No. | No. | |||
| Transpiration | Monthly | AQUATOOL | No. | No. | No. | Monthly? | |||
| Soil Frozen Water Content | Monthly | AQUATOOL | No. | No. | No. | Monthly? | |||
| Solar Radiation (Global Horizontal Radiation) | Daily | mean | ULEEDS, ENEA, IC3 | No. | No. | No. | It needs clarification. Horizontal? |