Analysis of the National Air Pollutant Emission Inventory (CAPSS 2016) and the Major Cause of Change in Republic of Korea.

In 2016, air pollutant emissions in the Republic of Korea were 795,044 metric tons (hereafter tons) of CO, 1,248,309 tons of NO_x, 358,951 tons of SO_x, 611,539 tons of TSP, 233,085 tons of PM₁₀, 100,247 tons of PM_2.5, 16,401 tons of BC, 1,024,029 tons of VOCs, and 301,301 tons of NH₃. Including energy production, thirteen emission sources, which comprise the national air pollutant emission inventory, were classified by their characteristics into five sectors (Energy, Industry, Road, Non-road, and Everyday Activities and Other Emission Sources) to analyze their relative contributions to the national emissions. Specifically, their contributions by pollutant were as follows: NO_x (11.0%), SO_x (21.9%), PM_2.5 (3.2%), VOCs (0.8%), NH₃ (0.5%) from the energy sector; NO_x (20.2%), SO_x (59.7%), PM_2.5 (42.1%), VOCs (24.3%), and NH₃ (14.4%) from the industry sector; NO_x (36.3%), SO_x (0.1%), PM_2.5 (9.7%), VOCs (4.6%), and NH₃ (1.7%) from the road sector; NO_x (24.8%), SO_x (11.5%), PM_2.5 (14.3%), VOCs (4.0%), and NH₃ (0.04%) from the non-road sector; and NO_x (7.6%), SO_x (6.7%), PM_2.5 (30.6%), VOCs (66.3%), and NH₃ (83.4%) from the everyday activities and other emission sources sector. The data we calculate are used as official national emissions data for the establishment, implementation, and assessment of national atmospheric environment policy to improve air quality. As critical and necessary materials, the data are also utilized on a wide range of studies on policies such as customized regional particulate matter reduction measures. Thus, it is crucial to estimate highly reliable national emissions by enhancing the emissions factors and inventory and to establish a scientific emissions testing system by using air quality modeling and satellite data. [ABSTRACT FROM AUTHOR]