5:15 PM - 6:30 PM
[MGI20-P06] Heat balance analysis for the snow surface in the Norikura highland
Keywords:heat balance analysis, snowmelt, Norikura highland
During the three snow cover seasons, the mean air temperature in this site is -3.7 C and the maximum snow depth has been about 150-180 cm. The result of the heat balance analysis on this site revealed that the net radiation heat flux comprised the largest proportion of the snowmelt energy, followed by the sensible heat flux (second largest). However, latent heat flux contributed to the large negative melt energy flux. We suggested why net radiation heat flux becomes very large because the wind speed of this site has been recorded about 1.0 m/s during the snow cover period, and then the turbulent heat flux became small amount of heat flux. In addition, the small amount of sensible heat flux was caused by low air temperature.