摘要
用遥感、地图和野外考察研究等方法，首次揭示了我国现代沙漠动态变化规律和发展趋势，认为我国现代沙漠动态变化的总趋势是向草原化和绿洲化方向缓慢发展，其变化速度为４４５ｋｍ２／ａ，我国现代沙漠还在继续蔓延，但其扩大速度比较缓慢，约为３１０ｋｍ２／ａ。
In the paper,based on
remote sensing, map and field investigation,the paper discussed the dynamic change and
development trends of modern deserts in China. The Change regularities of modern deserts
are the following aspects:①the deserts in China evolve slowly and its annual rate is
0.2%,i.e,there is 1618 km 2 desert to invert,activate,enlarge and shrink every year;②the
deserts in China invert significantly and its rate reaches to 1060 km 2/a;③the deserts in China
activate apparently and its rate is 610 km 2/a;④the deserts in China enlarge unsignificantly
and its rate is 310 km 2/a;⑤It is rare to shrink and its rate is only 10 km 2/a;⑥the total
development trends of modern deserts in China are to evolve to become grassland and oasis
slowly,its rate is 445 km 2/a. The main reason of modern changes is the artificial action.
Because the people harness and transform the deserts,the modern deserts invert and evolve to
become grassland and oasis gradually.But overgrazing and overfelling cause to activate and
enlarge some deserts.
出处
《地球科学进展》
CAS
CSCD
1999年第3期229-234,共6页
Advances in Earth Science
基金
国家自然科学基金
关键词
沙漠动态变化
发展趋势
中国
沙漠
Dynamic changes of deserts
Development trends
China
