Estimate of total CO2 output from desertified sandy land in China
Estimate of total CO2 output from desertified sandy land in China
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DOI：
10.1016/s1352-2310(01)00406-x
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发表时间：
2001-12-01
影响因子：
5
通讯作者：
Wang, G
中科院分区：
文献类型：
--
作者：
Duan, ZH;Xiao, HL;Wang, G
土壤是区域和全球碳收支的重要因素，因为它是大量有机碳的储存库。本研究利用不同时期的遥感数据，分析了中国荒漠化的发展和逆转，计算了中国荒漠化土地有机碳含量的变化。结果表明，荒漠化土地0-50 cm土层总有机碳储量为855 Mt.近40年来，土地荒漠化过程向大气释放的CO2总量为1.5亿t，而荒漠化逆转过程的CO2固存量为59 MtC。因此，中国荒漠化土地的CO2净释放量为91 MtC，约占全球温带和寒带年CO2释放量1.33MtC的68.42%，表明荒漠化土地在荒漠化逆转过程中具有更大的固碳潜力。(C)2001爱思唯尔科技有限公司版权所有。
Soil is an important factor in regional and global carbon budgets because it serves as a reservoir of large amount of organic carbon. In our study, using remote sensing data of different periods we analyzed the development and reversion of desertification in China, calculated the variations of organic carbon contents of the desertified lands in China. The results showed that the total storage of organic carbon in 0-50 cm soil layer of the desertified lands is 855 Mt. In recent 40 yr, the total CO2 amount released by land desertification processes to the atmosphere was 150 Mt, while the CO2 amount sequestered by desertification reversing processes corresponded to 59 Mt C. Hence, the net CO2 amount released from desertified lands of China corresponded to 91 Mt C, about 68.42% of the 133 Mt C of annual CO2 release in the global temperate and frigid zones, Simultaneously, it indicated that CO2 amount sequestered by desertification reversing processes in desertified land had greater potential than the other soils. (C) 2001 Elsevier Science Ltd. All rights reserved.