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EFFECT OF LAND DESERTIFICATION ON CO2 CONTENT OF ATMOSPHERE IN CHINA
Author(s): 
Pages: 47-52
Year: Issue:  4
Journal: ARID LAND GEOGRAPHY

Keyword:  中国土地沙漠化CO2含量;
Abstract: 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,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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