Long-term historical trends in air pollutant emissions in South Korea (2000~2018)

Kim, J., Park, J., Kim, B., Jang, Y., Kim, S., Choi, M., Kim, Y. ORCID: https://orcid.org/0000-0002-5053-5068, Hu, H., et al. (2022). Long-term historical trends in air pollutant emissions in South Korea (2000~2018). In: AGU Fall Meeting 2022, December 2022.

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Abstract

Since the 2000s, various air environment policies have been promoted due to the recent economic growth of Korea and the growing interest in air pollution among the public. The government has been implementing stronger mitigation policies. In this study, the long-term emission trend from '00 to '18 was estimated to understand the relationship, at least qualitatively, between historical emission changes and air quality improvement policies. The official emissions inventory in Korea is named CAPSS. We initially used the original CAPSS from '00 to '18, but end up adjusting the emissions estimated in several aspects.
Even though CAPSS has been estimating annual emissions since 1999, there are some inconsistency exist because of the data and methodological changes over the period. Also, emissions of PM2.5 had been initiated from year 2011, not 1999. Those limitations make it difficult to compare and analyze emissions inter-annually. To overcome those limitations, re-analysis of the annual emissions of pollutants were conducted using the update and upgrade, such as missing source addition and emission factor updates, history of CAPSS.

Checking the emission trends by pollutant from '00 to '18 in Korea, we could compare the linkages of NOx, SOx, PM, and CO with the air environment policy except for NH3, VOC. Decrease of NOx emissions were mainly due to more stringent emission standard, such as EURO 6. In the power generation sector, industrial sector, which are the main sources of SOx, the emissions have been reduced significantly due to the expansion of the low-sulfur fuel supply. VOC emissions have also been steadily increasing from '00 to '18, and it is difficult to find linkages with VOC reduction policies, such as the implementation of a VOCs reduction plan in the sector of solvent use. We, therefore, think VOC reduction in real world would not be as effective as planned in the policy, which is know as the “Rule Effectiveness” issue. The more detail results and analysis will be discussed at site

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