Ablation and heat balance of Biafo Glacier in Karakorum
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概要
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In the summer of 1977, surface ablation and relevant meteorological parameters were measured on the bare ice and moraine-covered ice of the Biafo Glacier in the Karakorum. The ablation rate of the bare ice was 6.8 cm/d in water equivalent while it was 2.1 cm/d for the 6 cm thick moraine-covered ice. The total amount of ablation had a close correlation with the positive degree-days of air temperature. Ablation experiments on ice with different moraine cover from 2 to 18 cm showed a decrease in ablation with an increase of moraine thickness. This result was similar to that which was obtained in the Hidden Valley in Nepal Himalaya, but slightly different from results obtained in Europe and Japan. Ablation of bare ice under two plastic sheets, having 44% and 94% in transmittivities of solar radiation, showed that the ablation was due mainly to the solar radiation; this was confirmed by a heat balance calculation. It is concluded that short-wave radiation is the dominant factor in the ablation of the Biafo Glacier.
- 社団法人 日本雪氷学会の論文
著者
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Nishimura Hiroshi
The Institute of Low Temperature Science, Hokkaido University
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SUIZU Shigeo
Environmental Research and Technology Institute Co.,
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NISHIMURA Kouichi
Japan Weather Association, Hokkaido Office
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Nishimura Hiroshi
The Institute Of Low Temperature Science Hokkaido University
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