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中国沙漠 ›› 1994, Vol. 14 ›› Issue (2): 42-48.

• 论文 • 上一篇    下一篇

末次冰期以来贵南沙地土地沙漠化与气候变化的关系

陶贞1, 董光荣2   

  1. 1. 郑州黄委会设计院, 郑州 450003;
    2. 中科院兰州沙漠研究所, 兰州 730000
  • 收稿日期:1993-07-10 出版日期:1994-06-20 发布日期:1994-06-20

RELATION OF LAND DESERTIFICATION AND CLIMATIC CHANGES SINCE LAST-GLACIAL PERIOD IN GUINAN SANDY LAND

Tao Zhen1, Dong Guangrong2   

  1. 1. Design Institute. Yellow River Conservaney Commission, Zhenzhou 450003;
    2. Insitute of Desert Research, Academin Sinica, Lanzhou 730000
  • Received:1993-07-10 Online:1994-06-20 Published:1994-06-20

摘要: 通过对青海贵南县凤凰山地层剖面的沉积相、磁化率曲线特征分析认为:(1)未次冰期以来,贵南沙地的土地沙漠化发展模式以正、逆过程相交替为基本特点;(2)贵南沙地的土地沙漠化正、逆过程与气候的干冷和暧湿变化所导致的水平生物气候带移动密切相关;(3)随着CO2等温室效应气体的增多,全球气候变暖,我国季风雨区扩大,本区降水量可能增加,土地沙漠化的发展趋势将是,正过程有所抑制,逆过程有所发展。

关键词: 末次冰期, 贵南沙地, 土地沙漠化, 气候变化

Abstract: From the analytical results of sedimentary facies and magnetic susceptibility and geologic records,we concluded as follows:(1) The evolution mode of the land desertification in Guinan is characterized by the alternations of the positive and reversed processes from last-glacial period onwards.(2) The positive and reversed desertification processes are related to the shifts of bioclimatic belts caused by cold-dry and warm-wet climatic fluctuations.(3) With the increase in greenhouse-effect gases,i.e.C02 and other trace gases,the global climate becomes warm,monsoon rain area will expand,the precipitation in the area may increase,the development of desertification will tend to suppress positive process and strengthen reversed process.

Key words: Desertification, Climatic change, Last glacial period