Estimation of greenhouse gas emissions in China 1990–2013

Considering the little attention given to building China's greenhouse gas (GHG) emission inventories, a long timescale and detailed GHG inventory is presented based on the latest released official statistical data in China from 1990 to 2013. GHG emissions estimated by different versions of statistical data are compared and analyzed, and the effects of data adjustment on GHG emission reduction targets are discussed. The inventory covers the sources of energy activities, industrial processes, agricultural activities, waste treatments, and reports four types of GHGs: CO 2 , CH 4 , N 2 O, and F‐GHGs. The total GHG emissions in China increased from 3487.7 Mt CO 2 ‐eq in 1990 to 12550.2 Mt CO 2 ‐eq in 2013. As the largest emission source, energy activities increased its share from 77.8% to 82.1% during the period. In GHG gas type, CO 2 emissions accounted for 86.2% of the total in 2013, followed by CH 4 (8.1%), N 2 O (3.3%) and F‐GHGs (2.4%). CO 2 emissions were mainly emitted from energy activities, while the total CH 4 emissions were essentially determined by sources of coal mining, enteric fermentation and rice cultivation. Both direct emission from agricultural lands and adipic acid production accounted for over 50% of N 2 O emissions. China's F‐GHG emissions increased by 129.3 times during the period. In addition, after the energy data revision, CO 2 emissions from energy activities was estimated significantly larger than most previous studies. The data revision also had a profound effect on the accomplishment of CO 2 emission reduction target in relative quantity.