10 metre u and v wind components, 10 metre wind speed, 2 metre dewpoint temperature, 2 metre temperature, albedo, angle of subgrid scale orography, anisotropy of subgrid scale orography, high cloud cover, high vegetation cover, ice surface temperature levels 1, 2, 3 and 4, land-sea mask, log of surface roughness for heat, low cloud cover, low vegetation cover, mean sea level pressure, medium cloud cover, sea-ice cover, sea surface temperature, skin reservoir content, skin temperature, slope of subgrid scale orography, snow albedo, snow density, snow depth, soil temperature levels 1, 2, 3 and 4, standard deviation of orography, surface geopotential, surface pressure, surface roughness, surface stress/Charnock, temperature of snow layer, total cloud cover, total column ozone, total column water, total column water vapour, type of high vegetation, type of low vegetation, vertical integral of divergence of geopotential flux, vertical integral of divergence of kinetic energy flux, vertical integral of divergence of mass flux, vertical integral of divergence of moisture flux, vertical integral of divergence of ozone flux, vertical integral of divergence of thermal energy flux, vertical integral of divergence of total energy flux, vertical integral of dry static energy, vertical integral of eastward geopotential flux, vertical integral of eastward heat flux, vertical integral of eastward kinetic energy flux, vertical integral of eastward mass flux, vertical integral of eastward ozone flux, vertical integral of eastward total energy flux, vertical integral of eastward water vapour flux, vertical integral of energy conversion, vertical integral of kinetic energy, vertical integral of mass of atmosphere, vertical integral of moist static energy, vertical integral of northward geopotential flux, vertical integral of northward heat flux, vertical integral of northward kinetic energy flux, vertical integral of northward mass flux, vertical integral of northward ozone flux, vertical integral of northward total energy flux, vertical integral of northward water vapour flux, vertical integral of temperature, vertical integral of thermal energy, vertical integral of total column frozen cloud water, vertical integral of total column liquid cloud water, vertical integral of total column ozone, vertical integral of total column water vapour, vertical integral of total energy, volumetric soil wetness levels 1, 2, 3 and 4;

angle of subgrid scale orography, anisotropy of subgrid scale, orography, high vegetation cover, land-sea mask, log of surface roughness for heat, low vegetation cover, slope of subgrid scale orography, standard deviation of orography, surface geopotential, surface roughness, type of high vegetation, type of low vegetation are invariant fields;

albedo changes on a monthly basis, but years are identical (climatological field).