In sbc_blk, absolute temperature is converted to potential temperature considering the wind measurement height, instead of the temperature/humidity one. Fixing this error leads to a small reduction in downward latent heat flux (~ +0.25 W/m2) and a small gain in downward sensible heat flux (~ -0.5 W/m2), resulting in a net non-solar flux decrease and a small SST cooling (-0.01 to -0.02 degC) using ORCA025 averaged over one year. Both Nemo 5 and 4.2 are concerned.