北京市碳足迹与碳承载力的动态研究

利用1999年～2009年北京市化石能源消费、生物质能利用和特殊工业生产以及各类植被面积数据,通过构建数量模型,分析碳足迹、植被固碳量等指标的动态变化。研究结果表明:北京市碳足迹由1999年的1.4111×108tCO2增加到2009年的1.9945×108tCO2;同期植被固碳量由1.062×107t CO2增加到1.151×107t CO2;碳赤字逐渐由1.3049×108tCO2增大到1.8794×108tCO2;碳足迹密度由85.99tCO2/hm2增大到121.54t CO2/hm2;碳足迹强度持续降低,由6.48tCO2/104元降到1.64tCO2/104元;碳生态压力指数由13.29增大为17.33。碳足迹分析结果反映出北京市在碳循环方面的生态环境压力有持续增大的趋势。

Dynamic of carbon footprint and vegetation carbon fixation quantity in Beijing

Based on the data of fossil energy consumption,biomass utilization and special industrial production and a variety of vegetation area of Beijing from 1999 to 2009,a quantitative model for analyzing the dynamic changes of the carbon footprint,vegetation carbon fixation quantity indicators were constructed.The results showed that Beijing's carbon footprint increased from 141.11 million ton in 1999 to 199.45 million ton in 2009.During the same period,vegetation carbon fixation quantity increased from 10.62 million ton to 11.51 million ton;carbon deficit increased from 1.3049×108 ton to 1.8794×108 ton;carbon footprint per unit land area increased from 85.99t/hm2 in 1999 to 121.54 t/hm2 in 2009;carbon footprint per unit GDP decreased from 6.48 ton/104 Yuan to 1.64 ton/104 Yuan;carbon pressure index increased from 13.29 to 17.33.Analysis showed that Beijing's ecological environment pressure in the carbon cycle increased continually.