The Pulse of Asia : vol.1 / 354 ページ（カラー画像）

0354	The Pulse of Asia : vol.1
アジアの鼓動 : vol.1

0354

The Pulse of Asia : vol.1

アジアの鼓動 : vol.1

CHAPTER XIV

THE WAXING AND WANING OF LOP-NOR

In traveling through the Lop basin we have everywhere
found evidences of pronounced changes of climate during
historic times. It will now be well to sum up the evidence,
and to ascertain how far the conclusion which we have
reached is in accordance with the phenomena of Lop-Nor.
The most widespread proof that there have been climatic
changes during the last two or three thousand years is found
in the death of vegetation over large areas. On the lower
slopes of the Kwen Lun Mountains the dissected condition
of deposits of loess shows that a cover of grassy vegetation
prevailed at no remote time, but has now died. In the zone
of vegetation, for a distance of seven hundred miles, plants
of all kinds show signs of drying up: the tamarisks usually
stand upon mounds; the poplars are dead or dying except
in the moistest places; and beds of dead reeds cover scores
of square miles. It has often been asserted that in many
parts of the world the destruction of forests has been the
cause of a diminution of rainfall. In the Lop basin, it is
manifest that the opposite has been true: a diminution in the
water supply has been the cause of the destruction of forests.
Another line of evidence shows that ancient roads such as
that from Keriya northward, or the great trade route
through Lulan, have been abandoned because there is now
no water along them. Again, in the Dry Mountains and else-
where, springs once frequented by animals or by men have

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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 『東洋文庫所蔵』貴重書デジタルアーカイブ

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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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