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

doi:10.1016/j.atmosenv.2013.05.042

Verification of NO_x 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

Department of Chemical Engineering & Materials Science

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

In this study, the emission inventories of NO_x, 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 NO_x emission during 1996-2005. Also, these two emission inventories were compared with the top down NO_x emissions estimated from satellite observations to validate the amount of NO_x emitted from South Korea. The total NO_x emission trends, sectoral and regional comparisons were carried out. The trend of the top down estimated NO_x emission was similar to CAPSS and REAS. However, the magnitudes of the top down estimated NO_x emission were usually closer to those of CAPSS than those of REAS. The NO_x emissions from transportation sector of REAS were larger than that of CAPSS, and this corresponded to the difference of total amount of NO_x 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 language	English
Pages (from-to)	496-508
Number of pages	13
Journal	Atmospheric Environment
Volume	77
DOIs	https://doi.org/10.1016/j.atmosenv.2013.05.042
State	Published - 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.

Keywords

CAPSS
NO emission inventories
REAS
South Korea
Top down NO estimation

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10.1016/j.atmosenv.2013.05.042

Cite this

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

abstract = "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.",

keywords = "CAPSS, NO emission inventories, REAS, South Korea, Top down NO estimation",

author = "Kim, {Na Kyung} and Kim, {Yong Pyo} and Yu Morino and Kurokawa, {Jun ichi} and Toshimasa Ohara",

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.",

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AU - Kim, Na Kyung

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AU - Morino, Yu

AU - Kurokawa, Jun ichi

AU - Ohara, Toshimasa

N1 - 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.

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N2 - 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.

AB - 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.

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