img

官方微信

高级检索

中国沙漠 ›› 1993, Vol. 13 ›› Issue (1): 21-27.

• 论文 • 上一篇    下一篇

中国北方地区沙漠化的现状与趋势之窥见

吴正1, 钟德才2   

  1. 1. 华南师范大学, 广州;
    2. 中国科学院兰州沙漠所, 兰州
  • 出版日期:1993-03-20 发布日期:1993-03-20

Present Status and Future Trend of Desertization in Northern China

Wu Zheng1, Zhong Decai2   

  1. 1. South China Normal University, Guangzhou;
    2. Institute of Desert Research, Acadcmia Sinica, Lanzhou
  • Online:1993-03-20 Published:1993-03-20

摘要: 近30年来,我国北方地区沙漠的面积有所扩大,但扩大不多;而主要表现为固定沙丘植被遭受破坏,面积减少,半固定沙丘和流动沙丘的面积相应大大增加,沙漠化程度明显加剧。沙漠的演变趋势主要受控于未来气候的变化,随着人类活动导致的CO2等温室效应气体浓度的增加,全球气候变暖,我国北方地区的东部大部分(除华北地区外)沙区降水可能增多,有利于沙漠化过程减缓甚至逆转;西部沙区干旱加强,将促使沙漠化的进一步发展。

关键词: 沙漠化, 演变趋势, 气候变化, 中国北方地区

Abstract: The area of desertization in Northern China slightly expanded over past 30 years. This is mainly manifested in the vegetation destruction and the area reduction of fixed sand dunes and considerably in crease in areas of semi fixed and mobile sand dunes as well as the marked exacerbation of dedertifica tion intensity. The evolutional trend of desert is largely controlled by future climatic changes with in crease in concentraction of greenhouse gas CO2 caused by human activities and the global climatic variations, the precipitation in eastern part of northern China may be increased, which will be favourable for the alleviation or reversing of the desertification processes. Conversely, the drought in western desert areas may be intensified, which will promote further development of the desertification.