Estimation of the seasonal variation of particulate nitrate and sensitivity to the emission changes in the greater Seoul area

Sihye Lee; Young Sung Ghim; Yong Pyo Kim; Jin Young Kim

doi:10.1016/j.atmosenv.2006.03.029

Estimation of the seasonal variation of particulate nitrate and sensitivity to the emission changes in the greater Seoul area

Sihye Lee, Young Sung Ghim, Yong Pyo Kim, Jin Young Kim

Department of Chemical Engineering & Materials Science

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

15 Scopus citations

Abstract

Seasonal variation of fine particulate nitrate and sensitivity of fine particle mass concentration to the emission changes of VOCs and NO_x were estimated in the greater Seoul area. SBOX, a photochemical box model was used to obtain the total nitric acid (HNO₃^T) concentration, and SCAPE2, a gas/particle equilibrium model was used to determine the partitioning of nitric acid/nitrate and particulate water content. Most HNO₃^T existed as nitrate except in summer (∼60%) since there was enough ammonia to form particulate ammonium nitrate. In summer, high temperature was favorable to gaseous nitric acid. Also, because of average relative humidity (RH) higher than the deliquescence points of most salts, water content in summer was higher than those in other seasons by a factor of two. For all seasons, fine particle mass concentration (the sum of ion concentrations and water content) increased until considerable amount of NO_x emissions was reduced. This phenomenon is a typical example of the so-called 'NO_x disbenefits' that has been discussed in relation to the abatement of ozone pollution.

Original language	English
Pages (from-to)	3724-3736
Number of pages	13
Journal	Atmospheric Environment
Volume	40
Issue number	20
DOIs	https://doi.org/10.1016/j.atmosenv.2006.03.029
State	Published - Jun 2006

Bibliographical note

Funding Information:
The authors wish to thank the Korea Ministry of Science and Technology (Project No. 2000-N-NL-01-C-184) and the Korea Institute of Science and Technology. Y.P. Kim is supported by the Climate Environment Research Center, a SRC program of the Korea Science and Engineering Foundation. Helpful comments of an anonymous reviewer are greatly acknowledged.

Keywords

Ammonia availability
Inorganic ions
NO disbenefits
Relative humidity
Volatilization

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10.1016/j.atmosenv.2006.03.029

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title = "Estimation of the seasonal variation of particulate nitrate and sensitivity to the emission changes in the greater Seoul area",

abstract = "Seasonal variation of fine particulate nitrate and sensitivity of fine particle mass concentration to the emission changes of VOCs and NOx were estimated in the greater Seoul area. SBOX, a photochemical box model was used to obtain the total nitric acid (HNO3T) concentration, and SCAPE2, a gas/particle equilibrium model was used to determine the partitioning of nitric acid/nitrate and particulate water content. Most HNO3T existed as nitrate except in summer (∼60%) since there was enough ammonia to form particulate ammonium nitrate. In summer, high temperature was favorable to gaseous nitric acid. Also, because of average relative humidity (RH) higher than the deliquescence points of most salts, water content in summer was higher than those in other seasons by a factor of two. For all seasons, fine particle mass concentration (the sum of ion concentrations and water content) increased until considerable amount of NOx emissions was reduced. This phenomenon is a typical example of the so-called 'NOx disbenefits' that has been discussed in relation to the abatement of ozone pollution.",

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author = "Sihye Lee and Ghim, {Young Sung} and Kim, {Yong Pyo} and Kim, {Jin Young}",

note = "Funding Information: The authors wish to thank the Korea Ministry of Science and Technology (Project No. 2000-N-NL-01-C-184) and the Korea Institute of Science and Technology. Y.P. Kim is supported by the Climate Environment Research Center, a SRC program of the Korea Science and Engineering Foundation. Helpful comments of an anonymous reviewer are greatly acknowledged.",

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AU - Ghim, Young Sung

AU - Kim, Yong Pyo

AU - Kim, Jin Young

N1 - Funding Information: The authors wish to thank the Korea Ministry of Science and Technology (Project No. 2000-N-NL-01-C-184) and the Korea Institute of Science and Technology. Y.P. Kim is supported by the Climate Environment Research Center, a SRC program of the Korea Science and Engineering Foundation. Helpful comments of an anonymous reviewer are greatly acknowledged.

PY - 2006/6

Y1 - 2006/6

N2 - Seasonal variation of fine particulate nitrate and sensitivity of fine particle mass concentration to the emission changes of VOCs and NOx were estimated in the greater Seoul area. SBOX, a photochemical box model was used to obtain the total nitric acid (HNO3T) concentration, and SCAPE2, a gas/particle equilibrium model was used to determine the partitioning of nitric acid/nitrate and particulate water content. Most HNO3T existed as nitrate except in summer (∼60%) since there was enough ammonia to form particulate ammonium nitrate. In summer, high temperature was favorable to gaseous nitric acid. Also, because of average relative humidity (RH) higher than the deliquescence points of most salts, water content in summer was higher than those in other seasons by a factor of two. For all seasons, fine particle mass concentration (the sum of ion concentrations and water content) increased until considerable amount of NOx emissions was reduced. This phenomenon is a typical example of the so-called 'NOx disbenefits' that has been discussed in relation to the abatement of ozone pollution.

AB - Seasonal variation of fine particulate nitrate and sensitivity of fine particle mass concentration to the emission changes of VOCs and NOx were estimated in the greater Seoul area. SBOX, a photochemical box model was used to obtain the total nitric acid (HNO3T) concentration, and SCAPE2, a gas/particle equilibrium model was used to determine the partitioning of nitric acid/nitrate and particulate water content. Most HNO3T existed as nitrate except in summer (∼60%) since there was enough ammonia to form particulate ammonium nitrate. In summer, high temperature was favorable to gaseous nitric acid. Also, because of average relative humidity (RH) higher than the deliquescence points of most salts, water content in summer was higher than those in other seasons by a factor of two. For all seasons, fine particle mass concentration (the sum of ion concentrations and water content) increased until considerable amount of NOx emissions was reduced. This phenomenon is a typical example of the so-called 'NOx disbenefits' that has been discussed in relation to the abatement of ozone pollution.

KW - Ammonia availability

KW - Inorganic ions

KW - NO disbenefits

KW - Relative humidity

KW - Volatilization

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Estimation of the seasonal variation of particulate nitrate and sensitivity to the emission changes in the greater Seoul area

Abstract

Bibliographical note

Keywords

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