国立情報学研究所 - ディジタル・シルクロード・プロジェクト
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Southern Tibet : vol.7 | |
南チベット : vol.7 |
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DESICCATION OF CENTRAL ASIA.
459
with the upbuilding, especially at high altitudes, which, as mentioned before, induces Professor PENCK to discuss the existence of an »upper denudation limit», above which no mountains are supposed to rise. That the Gurla Glacier retreats at the same time that the Garhwal passes are more snow-covered than formerly, depends upon local causes. The channel of Manasarovar is a useful control. When it is dry very likely the surrounding glaciers soon will begin to retreat. But the information that the Garhwal passes now are more difficult than in earlier days, cannot be used for scientific purposes. The change may simply depend on a deterioration of the natives in the surrounding regions, and a decline of the enterprising spirit.
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