It is easy to get the latent heat flux using Eddy Covariance or Bowen Ratio system observation in the field. However, I notice some days in winter the albedo could be 0.7 due to snowfall, and usually it decreased to normal in a few days (less than a week because the snow was not so much, in other words it is thin snow), i.e 0.7 0.6 , 0.5, until 0.25 in bare soil. In this period, how can we transfer the latent heat to the evaporation or sublimation? As we know, the vaporization constant is different for liquid and solid, one is (2500-2.4*T) KJ kg-1 and another is (2834.1-0.149*T) KJ kg-1.