1:45 PM - 2:00 PM
[MIS20-13] Comparison of surface energy balance of seasonal snowcover for three sites in Japanese alpine region
Keywords:snow melt, alpine region, snow surface energy balance
Three automatic weather stations, operated by Shinshu University, were located each targeted region in snow covered period of 2016/17 (Hydrological year). SEB analysis was conducted using surface energy balance method, and an analysis of turbulent heat flux was done using the bulk aerodynamic method. SEB analysis were conducted only snow covered period from October, 2016 to June, 2017.
The most major energy source was net shortwave radiation and negative energy flux was offered by net longwave radiation and latent heat flux in every site. Those characteristics were often reported in continental regions and high elevation areas, such as alpine region, because atmospheric condition in those regions are often cold and dry so that incoming turbulent enegy flux were restrained. The most atrractive characteristic resulted in SEB comparison is that the behavior of snowmelt energy flux in later ablation period is different in three sites. Snowpack in Nishi-Hodaka is persisted longer (untill June) than other two sites due to a lot of snowfall offered in winter, so that atmospheric condition (e.g. air temperature, specific humidity) and radiation components in later ablation period have been different from other two sites. Threrfore the different SEB properties in each site were also discovered.
Similar and diference SEB properties, which are resulted from regional climate condition and local topographic environment, among the three target sites were revealed. It is interesting that the target sites, relatively near but diferent (or same) elevation band, have each different SEB properties, so more detailed analysis of regional SEB properties are required.Comparison of surface energy balance of seasonal snowcover for three sites in Japanese alpine regionComparison of surface energy balance of seasonal snowcover for three sites in Japanese alpine region