||  ''' 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) || Accumulated or flux, which is preferred? ||
|| 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) || VORTEX and ENEA really want u/v components  ||
|| 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. ||  ||
|| 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) || *Find out  if they include transpiration.Monthly?  ||
|| Water Content of Soil Layer || Daily || mean || || ''(GUESS)'' || || Yes. (Derived: swvl1, swvl2, swvl3, swvl4) || No. (Proxy: soilm1, soilm2, soilm3, soilm4) || No. || Total? ||
|| Water Content of Soil Layer || Monthly || || || GUESS, ''(AQUATOOL)'' || || Yes. (Derived: swvl1, swvl2, swvl3, swvl4) || No. (Proxy: soilm1, soilm2, soilm3, soilm4) || No. || 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. || Acording to System4 documentation, they are only available from 1981-1990 and 2009 to present ||
|| 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) ||  ||
|| Total Soil Moisture Content || Daily || mean || || ''(AQUATOOL)'' || || No. (Proxy:swvl1, swvl2, swvl3, swvl4) || Yes. (Derived:soilm1, soilm2, soilm3, soilm4) || Yes. (mrso) ||  ||
|| 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?  ||
|| Surface downwelling longwave flux in air || At 7am, 2pm and 9pm (local time) || point || PET || || || No. (Proxy: daily strd) || Yes. (6havgd:dlwsfc) || No. ||  ||
|| Surface downwelling shortwave flux in air || At 7am, 2pm and 9pm (local time) || point || PET || || || No. (Proxy: daily ssrd) || Yes. (6havgd:dswsfc) || No. ||  ||
|| Cloud area fraction || Daily || mean || || || ENEA || No. (Proxy:tcc) || No. || Yes. (clt) ||  ||
|| 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) ||  ||
|| 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? ||