历史时期气候变化和人类活动对毛乌素地区沙漠化的影响

通过对历史时期毛乌素地区气候变化、人类活动和沙漠化过程的综合分析认为,历史时期毛乌素地区的沙漠化呈逐渐加速的趋势;唐朝之前本区沙漠化主要受气候变化的控制,之后人类活动的影响越来越明显;不论是冷湿还是暖湿气候,良好的水分条件总是有利于沙漠化的逆转,而农业活动总是会造成沙漠化的扩展。今后本区的沙漠化是扩展还是逆转在很大程度上将取决于全球变暖对毛乌素地区降水量的影响以及农业和牧业所占的份额。

The Impact of Historical Climate Change and Human Activities on the Sandy Desertification of Mu Us Region

Integrated the materials of climate change,human activities and the sandy desertification process were intergrated to analyze the impact of climate change and human activities on the desertification respectively.The result indicated that the desertification of this region was accelerated gradually through historical time.Before Tang Dynasty,the sandland development was dominated by climate condition,then,the influence of human became more and more important.A wet climate could prevent the desertification from expanding and the agriculture could speed the expanding of the desertification.The future development of the desertification of this region will depend on the precipitation change caused by the global warming and the proportion of agriculture and stockbreeding.