Glaciations in the Khumbu Himal (1) : Glaciological Expedition of Nepal, Contribution No. 41
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概要
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The Great Himalayas are located along a boundary zone of geological, geomorphological and climatological phenomena and there is a ceaseless upheaval of the Himalayas that changes and influences to the topography and the climate. A glacier is a compound phenemenon related to the geological history, changes of the topography and climate which affect the characteristics of the glaciers of the Himalayas.<BR>Glaciation as well as fluctuation studies on glaciers in the Khumbu Himal, East Nepal, were carried out since 1970. Fluctuating phenomena were observed and there are alternate periods of snow-deposition and erosion years, and the deposition period ranges from 4 to 9 years. There are also found the fluctuations of terminus movements of the Gyajo Glacier which retreated by 23 m/yr from 1970 to 1973, but advanced by 2 m/yr since 1973.<BR>The shape of the recent moraines has a similarity to that of the surge glacier reported in the other parts of the world and there is a possibility that the recent moraines were formed by the rapid advancement of the glacier ice body.<BR>The past U-shaped valleys are classified into three series; U-1, U-2 and U-3. The U-1 and U-2 series have two stages, but the U-3 series has three stages which are further divided into several substages. The series of U-shaped valleys shows that the younger the age of the U-shaped valley is, the deeper the cliff of the valley is, and also the smaller the scale is. This suggests that the topographic changes take an irreversible course which tends to preferentially form the type of the valley glacier in response to intense upheavals of the Great Himalayas and to intermittent glaciations, and glaciations of this region is getting smaller through Quaternary period as the Great Himalayas have been rising.
- 社団法人 日本雪氷学会の論文
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関連論文
- Preliminary Report on Glacier Inventory in the Dudh Kosi Region : Glaciological Expedition of Nepal, Contribution No. 58.
- Stratigraphic Studies of the Gyajo Glacier, Khumbu Himal : Glaciological Expedition of Nepal, Contribution No. 45
- Glaciations in the Khumbu Himal (2) : Glaciological Expedition of Nepal, Contribution No. 57
- Structural Studies of Glaciers in the Khumbu Region : Glaciological Expedition of Nepal, Contribution No. 36
- Glaciations in the Khumbu Himal (1) : Glaciological Expedition of Nepal, Contribution No. 41
- Preliminary Report on Flight Observations of 1976 and 1978 in the Nepal Himalayas:Glaciological Expedition of Nepal, Contribution No. 70.
- Outline of Debris Cover Project in Khumbu Glacier:Glaciological Expedition of Nepal Contribution No. 62 Project Report No.1 on "Studies on Supraglacial Debris of the Khumbu Glacier"
- Surface Morphology in the Ablation Area of the Khumbu Glacier:Glaciological Expedition of Nepal, Contribution No. 63 Project Report No.2 on "Studies on Supraglacial Debris of the Khumbu Glacier"
- Distributions and Grain Sizes of Supraglacial Debris in the Khumbu Glacier, Khumbu Region, East Nepal:Glaciological Expedition of Nepal, Contribution No. 64 Project Report No. 3 on "Studies on Supraglacial Debris of the Khumbu Glacier"
- Fluctuations of Glaciers from 1970 to 1978 in the Khumbu Himal, East Nepal:Glaciological Expedition of Nepal, Contribution No. 72.