| 末次冰期以来贵南沙地土地沙漠化与气候变化的关系 |
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| 引用本文： | 陶贞,董光荣.末次冰期以来贵南沙地土地沙漠化与气候变化的关系[J].中国沙漠,1994(2). |
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| 作者姓名： | 陶贞 董光荣 |
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| 作者单位： | 郑州黄委会设计院，中科院兰州沙漠研究所 |
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| 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ＣＯ＿２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。
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| 关 键 词： | 末次冰期，贵南沙地，土地沙漠化，气候变化 |
RELATION OF LAND DESERTIFICATION AND CLIMATIC CHANGES SENCE LAST-GLACIAL PERIOD IN GUINAN SANOY LAND |
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| Tao Zhen ,Dong Guangrong.RELATION OF LAND DESERTIFICATION AND CLIMATIC CHANGES SENCE LAST-GLACIAL PERIOD IN GUINAN SANOY LAND[J].Journal of Desert Research,1994(2). |
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| Authors: | Tao Zhen Dong Guangrong |
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| Abstract: | From the analytical results of sedimentary facies and magnetic susceptibility andgeologic records, we conclucled as follows:(1) The evolution mode of the land desertification in Guinan is characterized by the alternationsof the positive and reversed processes from last-glacial peried onwards. (2) The positive and reversed desertification processes are related to the shifts of bioclimaticbelts caused by cold-dry and warm-wet climatic fluctuations. (3 )With the increase in greenhouse-effect gases,i.e, CO_2 and other trace gases,the globalclimate becomes warm,monscon 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. |
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| Keywords: | Desertification Climatic change Last glacial period |
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