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基于我国铁路部门逐年统计数据,计算了1975—2005年我国铁路机车的CO2排放量,分析了我国铁路机车CO2排放强度及其变化特点。结果表明,由于蒸汽机车不断被内燃机车和电力机车所取代,我国蒸汽机车CO2年排放量逐年降低,内燃机车的CO2年排放量逐年上升,铁路机车CO2总排放量由1975年的4223万t降至2005年的1640万t,CO2排放强度呈现明显的降低趋势,年均降低2.4g/换算吨公里。我国铁路机车的CO2排放量占整个交通运输仓储和邮政行业CO2排放量的比重也呈逐年降低趋势。
Based on the annual statistics of China’s railway departments, the CO2 emissions of China’s railway locomotives from 1975 to 2005 were calculated and the CO2 emission intensity and its changing characteristics of China’s locomotives were analyzed. The results show that as the steam locomotives are continuously replaced by diesel locomotives and electric locomotives, the annual emission of CO2 in China’s steam locomotives has been declining year by year. The CO2 emission of diesel locomotives has been rising year by year. The total CO2 emissions of railway locomotives have dropped from 42.23 million tons in 1975 To 16.4 million tons in 2005, CO2 emission intensity showed a clear downward trend, with an average annual reduction of 2.4g / tonne conversion. The proportion of CO2 emissions of China’s railway locomotives in the total amount of CO2 emissions in the transportation warehousing and postal services has also been decreasing year by year.