| 中国土地沙漠化对大气CO2含量的影响 |
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| 引用本文： | 段争虎,刘新民.中国土地沙漠化对大气CO2含量的影响[J].干旱区地理,1995,18(4):47-52. |
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| 作者姓名： | 段争虎 刘新民 |
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| 作者单位： | 中国科学院兰州沙漠研究所!兰州730000 |
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| 基金项目： | 中国科学院沙坡头开放试验站基金 |
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| 摘 要： | 本文根据我国不同地区沙漠化类型的面积，土壤有机碳的含量及沙漠化的正逆转速率。计算了我国沙漠化土地中有机碳的变动。结果表明，我国沙漠土地０－５０ｃｍ，土层中有机碳的总贮量为７５３．１４３Ｍｔ，近４０年来因土地沙漠化而释放到大气听ＣＯ２总量达１７３．２８６Ｍｔ，而逆转过程中固定的ＣＯ２量为５９．１２４Ｍｔ碳，所以，近４０年来我国沙漠化土地净释放到大气中的ＣＯ２为１２４．４７５Ｍｔ，占全球温带和寒带土地
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| 关 键 词： | 土地 沙漠化 大气 二氧化碳 含量 |
EFFECT OF LAND DESERTIFICATION ON CO_2 CONTENT OF ATMOSPHERE IN CHINA |
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| Duan Zhenghu,Liu Xinmin,Qu Jianjun.EFFECT OF LAND DESERTIFICATION ON CO_2 CONTENT OF ATMOSPHERE IN CHINA[J].Arid Land Geography,1995,18(4):47-52. |
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| Authors: | Duan Zhenghu Liu Xinmin Qu Jianjun |
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| Abstract: | The change of organic carbon contents of the desertified land is calculated according to the area of descrtified land, organic carbon contcnt in soil and rate of desthefucation development or adverse processes in China. The results show that the total reserves of organic carbon are 753.143Mt, the carbon dioxide released to atmosphere is 173.286 Mt due to the land desertification, and the carbon dioxide assimilatcd from atmosphere in the adverse processes of desertification is 59.124 Mt in the last 40 ycars. Therefore, the net CO2 released to atmosphere is 124.475 Mt, which occupies 93.5% of the annual released CO2 (133 Mt) from the lands in the temperate zone and frigid zone in the world. |
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| Keywords: | land desertification CO_2 conternt China |
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