SURFACE ENERGY BALANCE OF A PERENNIAL SNOWBANK, MELVILLE ISLAND, NORTHWEST TERRITORIES, CANADA

摘要: The energy balance of a large perennial snowbank located in the continuous permafrost zone was examined during summer 1986. Three meteorological towers allowed fluxes to be determined for separate zones snowbank. Over melt season, net radiation accounted 85% absorbed by snow surface, while sensible heat contributed 15% and latent loss 2%. Albedo varied across due an irregular distribution surface aeolian deposits. Direct measurements snowmelt from survey compare favorably with calculated values obtained balance. shortwave flux significant influence on ablation, explaining average 77% variance measured melt. predominance radiant is attributed size its sustained through cool arctic summer.