Verification of NOx emission inventory over South Korea using sectoral activity data and satellite observation of NO2 vertical column densities

Na Kyung Kim, Yong Pyo Kim, Yu Morino, Jun ichi Kurokawa, Toshimasa Ohara

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30 Scopus citations


In this study, the emission inventories of NOx, which is a major air pollutant of South Korea were compared and analyzed. The two bottom-up emission inventories, Clean Air Policy Support System (CAPSS) and Regional Emission inventory in ASia (REAS), which are the latest emission inventories about the air pollutant emissions about South Korea were compared to find out the trend of NOx emission during 1996-2005. Also, these two emission inventories were compared with the top down NOx emissions estimated from satellite observations to validate the amount of NOx emitted from South Korea. The total NOx emission trends, sectoral and regional comparisons were carried out. The trend of the top down estimated NOx emission was similar to CAPSS and REAS. However, the magnitudes of the top down estimated NOx emission were usually closer to those of CAPSS than those of REAS. The NOx emissions from transportation sector of REAS were larger than that of CAPSS, and this corresponded to the difference of total amount of NOx emission between CAPSS and REAS. By comparing the differences of the ratios of the vehicle kilometers traveled (VKT) and emission factors (EFs), it was identified that most of the difference between CAPSS and REAS was due to these factors for diesel vehicles in REAS. Implications of this higher VKT values in REAS were discussed.

Original languageEnglish
Pages (from-to)496-508
Number of pages13
JournalAtmospheric Environment
StatePublished - Oct 2013

Bibliographical note

Funding Information:
A part of this study was carried out while one of the authors (N.K. Kim) was in NIES by the Global Internship Program from National Research Foundation (NRF) of Korea. This work was also supported by the NRF grant funded by the Korea government (MEST) (No. 2012-0000851 and No. 2012-0005208 ) and the Global Environment Research Fund (S-7) by the Ministry of the Environment, Japan . We would like to acknowledge Profs. A. Richter and J. P. Burrows of University of Bremen for providing satellite observation data of GOME and SCIAMACHY.


  • NO emission inventories
  • REAS
  • South Korea
  • Top down NO estimation


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