Accumulation and Ablation at Syowa Station

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The results of the observations of accumulation and ablation in the period 1968-1975 in the vicinity of Syowa Station are summarized. There were two typical areas on sea ice; one was the area characterized by the accumulation of several tens cm and situated near the obstacles to wind such as island or iceberg, and the other characterized by little accumulation, free from such obstacles. The process of ablation can be separated into two stages by the critical temperature of -3℃ in daily mean air temperature. Ablation was related to meteorological factors and the relation between ablation and daily mean air temperature was formulated as A=0.40T^2+4.8T+17.0. Using this equation, the depth of snow to be melted in one summer period was estimated at 1184mm as the average of five summer periods from 1968-1969 to 1972-1973. Ablation on East Ongul Island was about three times that on sea ice. This difference may be explained by the effect of bare ground as a heat source.
国立極地研究所の論文