摘要:

As China’s largest CO 2 emission source, power sector has a large scale of power exchange, which results in the issue of interprovincial CO 2 emissions transfer embodied in power transmission. Based on interprovincial detailed power exchange data, a bottom-up method which takes into account the fuel mix of exported electricity is developed to calculate provincial CO 2 emissions embodied in power transmission. Provincial CO 2 emissions from power sector associated in consumption perspective in 2007, 2010 and 2012 are analyzed and compared with those in production based perspective. The calculation shows that total CO 2 emissions embodied in interprovincial power exchange is 532 Tg in 2012, accounting for 14% of total emissions from power sector. The embodied emissions have risen by 94% between 2007 and 2012. The general transfer pathway of embodied CO 2 emissions is from eastern China to western China with long-range power transmission. The disparities between consumption and production based CO 2 emissions are significant in some provinces. The production based CO 2 emissions from power sector of Inner Mongolia are 195 Tg higher than those of the consumption based, while the consumption based emissions of Beijing are 484% larger than those of the production based. This study also reveals an increasing trend of CO 2 emissions from both production and consumption principles for most provinces over the period 2007–2012.