TRANSFER-COEFFICIENTS OF SENSIBLE HEAT ON A SNOWMELT SURFACE

Field observations were carried out in order to determine the transfer Coefficeient of sensible heat flux above a melting snow surface at the Moshiri experimental site. The coefficient is calculated as the ratio of the sensible heat flux determined by the eddy correlation method using a sonic anemometer to the product of the wind speed and the temperature difference between the air and snow surface. The sensible heat fluxes are also compared with the result of the precise heat balance observations. The nondimensional transfer coefficient h shows a good correlation with the atmospheric stability, Ri. The value of h = 2.3 x 10(-3) is obtained in the range of 0 < Ri < 0.1, however, it is smaller and scattered under stronger stable condition (Ri > 0.1). The dimensional transfer coefficent for sensible heat flux is calculated, and a linear relationship is obtained as a function of the logarithm of atmospheric stability.