| 中国土地沙漠化对大气CO_2含量的影响 |
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| 引用本文： | 段争虎,刘新明.中国土地沙漠化对大气CO_2含量的影响[J].干旱区资源与环境,1996,10(2):89-94. |
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| 作者姓名： | 段争虎 刘新明 |
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| 作者单位： | 中国科学院兰州沙漠研究所 |
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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，我国沙漠化土地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中的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量为１２４．４７５Ｍｔ碳，占全球温带和寒带土地每年释放ＣＯ２量１３３Ｍｔ碳的９３．５％。
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| 关 键 词： | 沙漠化，CO_2，大气环境，全球变化 |
ATMOSPHERIC CO_2 CONTENT AFFECTED BY DESERTIFICATION IN CHINA |
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| Duan Zhenghu, Liu Xinming, Qn Jianjun.ATMOSPHERIC CO_2 CONTENT AFFECTED BY DESERTIFICATION IN CHINA[J].Journal of Arid Land Resources and Environment,1996,10(2):89-94. |
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| Authors: | Duan Zhenghu Liu Xinming Qn Jianjun |
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| Abstract: | The paper,according to areas and conversion rates( positive and negative)of desertified lands, contents of organic carbon in soils, calculates the quantitative dynamics of China desertified lands, the results show: The organic carbon stored in0-50cm soil layers of national desertified lands amounts to 753.143Mt; over the recent 40 years, 173. 286Mt of CO2 are released from desertified lands, however, only 59.124Mt of CO2 are fixed In the reverse processes to desertificafion; that is, China desertified lands have released 124.475Mt of CO2 into the air over the 40 years. |
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| Keywords: | Desertification CO_2 atmospheric environment global change |
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