We estimated the CO 2 emissions produced by more than 40 000 international flights associated with Japan’s two major airlines (Japan Airlines and All Nippon Airways), and identified the drivers for these CO 2 emissions using an index decomposition analysis conducted between 2005 and 2015. The results showed that introducing the more fuel-efficient Boeing 787 led to CO 2 emission reductions of 1.3 million tons by the two companies. However, these reductions were canceled out by the total number of flights and distances per passenger attributable to the airlines’ operations. We conclude that the environmental and business strategy of introducing greener aircraft with better fuel efficiency was insufficient for mitigating aircraft emissions’ effects on climate.

中文翻译：

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国际航空中CO 2排放的驱动因素：日本为例

我们估算了与日本两家主要航空公司（Japan Airlines和All Nippon Airways）相关的超过40 000次国际航班产生的CO 2排放，并使用2005年至2015年进行的指数分解分析确定了这些CO 2排放的驱动因素。结果表明，引入更省油的波音787可以使两家公司的CO 2排放量减少130万吨。但是，由于航空公司的运营，航班总数和每位旅客的飞行距离被抵消了。我们得出的结论是，引入具有更高燃油效率的绿色飞机的环境和商业策略不足以减轻飞机排放物对气候的影响。