巴丹吉林沙漠及其毗邻地区的景观类型及其形成机制初探

利用气候地貌学原理，分析研究了巴丹吉林沙漠及其毗邻地区的景观类型。研究地区的现代景观形态主要是风营力地形、荒漠平原及淮平原。由同干旱发展，古老的准平原正在向荒漠平原过渡，而在周围山地上的荒漠沟谷地区也已出现了几成沙，开矿上成为荒漠沟谷向风营力地形的过渡形式。在古湖盆地区因湖泊干枯，地表形态正在向风营力地形方向发展。根据沙丘上的胶结面及周围湖泊的水位变化，笔都初步认为在西风环汉的作用下，马丹吉林地区

Landscape Types and its Formation Mechanism in the Badain Jaran Desert and its Surrounding Areas

On the basis of climatic geomorphology, the author investigates the types of landscape in the Badain Jaran Desert and its surrounding areas. The present forms of landscape in the research area are mainly aerodynamic relief, desert plain and pediment. Because the climate becomes drier, the former pediment is undergoing the transformation toward desert plain. Aeolian sand comes into appearance in the place of former desert gorges in the surrounding mountains. The fossil desert gorges are becoming the intermediate form between desert gorges and aerodynamic relief. In the old lake basin, the land surface is now under development of aerodynamic relief because of the disappearance of water. Based on the consolidation on the dune surface and water level changes of surrounding lakes, the author concludes that it was more humid at the times present than 30 ka B.P. than at present and 20 ka B.P. in the areas of Badain Jaran owing to the influence of westerlies. The similar situation happens several times during Holocene, but these were due to the variation of the Asian summer monsoon.