A method for estimating the sensible heat flux in the inertial sub-layer from high-frequency air temperature and averaged gradient measurements

The new SR method was consistently best correlated (0.78 ≤ R2 ≤ 0.90, where the highest and lowest R2 correspond to stable and unstable cases with positive net radiation, respectively) than the earlier SR method (0.71 ≤ R2 ≤ 0.74) to HEC. The RMSE, however, for the new and the earlier SR method were comparable, in general, RMSE ≤ 25 W m−2. It is concluded that for field applications the implementation of the new and the earlier SR method is an affordable and reliable alternative to the EC method to obtain long series of half-hourly H.