城市复合生态系统碳氧平衡分析——以沿海城市厦门为例

通过综合城市复合生态系统内社会经济活动的主要排碳、耗氧行为,以及城市区域内湿地、淡水、海洋、森林和农田5种遗留自然生态系统的固碳释氧功能,构建了城市碳氧平衡分析模型（UCOB）,并估算了城市社会经济活动和城市中自然生态系统的碳氧收支,对城市生态系统平衡状况进行定量化指征.最后,以中国东南沿海城市厦门为例进行研究.结果显...

Analysis of the carbon and oxygen balance of a complex urban ecosystem: A case study in the coastal city of Xiamen

Through combining the major oxygen consumption and carbon emission of the social economic activities and the carbon sequestration and oxygen emission of the five remnant natural ecosystems in an urban complex ecosystem, this paper built up an urban carbon and oxygen balance model (UCOB) to estimate the input and output of carbon and oxygen, quantitatively indicating the ecological balance of an urban complex ecosystem. The results from the case study of Xiamen, a coastal city in southeastern China showed: In 2007, the carbon balance index and oxygen balance index of the city were 9.03 and 5.78 respectively, which means the total amount of oxygen consumption and carbon emission from urban social economic activities were 9.03 and 5.78 times greater than the amount of natural oxygen emission and carbon sequestration in Xiamen City, respectively. Without considering the indirect oxygen consumption and carbon emission from the electricity consumption, the balance indices of carbon and oxygen of Xiamen City were 5.26 and 1.47 respectively. Carbon and oxygen balance indices showed a significant variation among the six administrative districts of Xiamen City, for their difference in social economic functions and distribution of natural ecosystems. As an old industrial zone, Huli district suffered the highest unbalance of carbon and oxygen. Without considering the indirect oxygen consumption and carbon emission, Haicang district, a new emerged industrial area, was the worst. Located in the suburban area and possessing large area of natural vegetation cover, Tongan district and Xiangan district had the best carbon and oxygen balance. In the end, the future development of carbon and oxygen balance in Xiamen City was discussed, as well as the possible control measures, based on the city orientation and major function zoning. We hope the paper can contribute to better understand the carbon and oxygen balance of an urban complex ecosystem, providing the scientific basis for rational urban overall planning and function division to establish low-carbon and sustainable urbanization.