历史文献记录的塔克拉玛干沙漠南缘的气候环境变化

本文采用历史文献记录的信息,研究塔克拉玛干沙漠南缘历史时期的气候和环境变化。结果表明:塔克拉玛干沙漠南缘地区的干旱环境由来已久;历史文献记录的气候变化与相关地区对应较好;历史时期的环境变化是自然和人类活动综合作用的结果;沙漠化多发生在沙漠内部河流下游的绿洲地段,而其发生的原因主要是河流改道,绿洲废弃,沙丘前移入侵从而形成沙漠化土地,而不是过去一般认为的整个沙漠南移的结果。

The change of the cfimate and environment in the southern margin of Takfimakan Desert based on historical literature records

In this paper, we analyze the change of the climate and environment in the southern margin of the Taklimakan Desert based on the rich information of historical literatures. The results show that： in the southern margin of Taklimakan Desert has been drought for a long time; the climate change recorded by historical literatures is better corresponding to that of related regions; the environmental changes were attributed to the natural factors and human activities comprehensively in the historical period; the desertification occurs in oasis areas of the river downstream of the desert, and the reason is mainly due to the river diversion, the abandonee of the oasis and the forward movement of sand so as to the formation of the deseaification land, rather than the movement southwards of entire desert like the previous point.