Seasonal Characteristics of HONO Variations in Seoul during 2021~2022

Junsu Gil; Meehye Lee; Hyunmin Lee; Jihi Jang

doi:10.5572/KOSAE.2023.39.3.308

Seasonal Characteristics of HONO Variations in Seoul during 2021~2022

Junsu Gil^*
, Meehye Lee
, Hyunmin Lee
, Jihi Jang

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

HONO takes up a large amount of urban OH budget in the early morning through photolysis and is one of the major reactive nitrogen oxides (NO_y) that finally contributes to the enhancement of daytime O₃ and potentially PM_2.5 nitrate (NO₃^-). Therefore, it is important to figure out the distribution and characteristics of HONO to understand the formation mechanisms of O₃ and NO₃^- in urban areas. In this study, real-time HONO measurement was conducted in Seoul, South Korea from 2021 to 2022 using the MARGA (Monitor for AeRosol and Gases in Ambient air) system. During the whole measurement period, average concentration of HONO was 0.96 ppbv, and it was higher in the cold season when the NO₂ concentration was high. Regardless of the season, HONO increased with an increase in NO₂ and relative humidity, indicating that the HONO in Seoul was influenced by the heterogeneous formation. In addition, the impact of HONO on O₃ was differed on the season, and HONO showed the possibility to contribute to the NO₃^- during both daytime and nighttime via formation-loss process.

Translated title of the contribution	2021~2022년 서울 도심에서 측정된 HONO의 변화 특성
Original language	English
Pages (from-to)	308-319
Number of pages	12
Journal	Journal of Korean Society for Atmospheric Environment
Volume	39
Issue number	3
DOIs	https://doi.org/10.5572/KOSAE.2023.39.3.308
Publication status	Published - 2023

Bibliographical note

Publisher Copyright:
© 2023, Journal of Korean Society for Atmospheric Environment. All Rights Reserved.

Keywords

Heterogeneous reaction
MARGA
Nitrous acid (HONO)
O
PM nitrate (NO)

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Environmental Science (miscellaneous)
Pollution

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10.5572/KOSAE.2023.39.3.308

Cite this

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title = "Seasonal Characteristics of HONO Variations in Seoul during 2021\textasciitilde{}2022",

abstract = "HONO takes up a large amount of urban OH budget in the early morning through photolysis and is one of the major reactive nitrogen oxides (NOy) that finally contributes to the enhancement of daytime O3 and potentially PM2.5 nitrate (NO3-). Therefore, it is important to figure out the distribution and characteristics of HONO to understand the formation mechanisms of O3 and NO3- in urban areas. In this study, real-time HONO measurement was conducted in Seoul, South Korea from 2021 to 2022 using the MARGA (Monitor for AeRosol and Gases in Ambient air) system. During the whole measurement period, average concentration of HONO was 0.96 ppbv, and it was higher in the cold season when the NO2 concentration was high. Regardless of the season, HONO increased with an increase in NO2 and relative humidity, indicating that the HONO in Seoul was influenced by the heterogeneous formation. In addition, the impact of HONO on O3 was differed on the season, and HONO showed the possibility to contribute to the NO3- during both daytime and nighttime via formation-loss process.",

keywords = "Heterogeneous reaction, MARGA, Nitrous acid (HONO), O, PM nitrate (NO)",

author = "Junsu Gil and Meehye Lee and Hyunmin Lee and Jihi Jang",

year = "2023",

doi = "10.5572/KOSAE.2023.39.3.308",

language = "English",

volume = "39",

pages = "308--319",

journal = "Journal of Korean Society for Atmospheric Environment",

issn = "1598-7132",

publisher = "Korean Society for Atmospheric Environment",

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TY - JOUR

T1 - Seasonal Characteristics of HONO Variations in Seoul during 2021~2022

AU - Gil, Junsu

AU - Lee, Meehye

AU - Lee, Hyunmin

AU - Jang, Jihi

PY - 2023

Y1 - 2023

N2 - HONO takes up a large amount of urban OH budget in the early morning through photolysis and is one of the major reactive nitrogen oxides (NOy) that finally contributes to the enhancement of daytime O3 and potentially PM2.5 nitrate (NO3-). Therefore, it is important to figure out the distribution and characteristics of HONO to understand the formation mechanisms of O3 and NO3- in urban areas. In this study, real-time HONO measurement was conducted in Seoul, South Korea from 2021 to 2022 using the MARGA (Monitor for AeRosol and Gases in Ambient air) system. During the whole measurement period, average concentration of HONO was 0.96 ppbv, and it was higher in the cold season when the NO2 concentration was high. Regardless of the season, HONO increased with an increase in NO2 and relative humidity, indicating that the HONO in Seoul was influenced by the heterogeneous formation. In addition, the impact of HONO on O3 was differed on the season, and HONO showed the possibility to contribute to the NO3- during both daytime and nighttime via formation-loss process.

AB - HONO takes up a large amount of urban OH budget in the early morning through photolysis and is one of the major reactive nitrogen oxides (NOy) that finally contributes to the enhancement of daytime O3 and potentially PM2.5 nitrate (NO3-). Therefore, it is important to figure out the distribution and characteristics of HONO to understand the formation mechanisms of O3 and NO3- in urban areas. In this study, real-time HONO measurement was conducted in Seoul, South Korea from 2021 to 2022 using the MARGA (Monitor for AeRosol and Gases in Ambient air) system. During the whole measurement period, average concentration of HONO was 0.96 ppbv, and it was higher in the cold season when the NO2 concentration was high. Regardless of the season, HONO increased with an increase in NO2 and relative humidity, indicating that the HONO in Seoul was influenced by the heterogeneous formation. In addition, the impact of HONO on O3 was differed on the season, and HONO showed the possibility to contribute to the NO3- during both daytime and nighttime via formation-loss process.

KW - Heterogeneous reaction

KW - MARGA

KW - Nitrous acid (HONO)

KW - O

KW - PM nitrate (NO)

UR - https://www.scopus.com/pages/publications/85164596263

U2 - 10.5572/KOSAE.2023.39.3.308

DO - 10.5572/KOSAE.2023.39.3.308

M3 - Article

AN - SCOPUS:85164596263

SN - 1598-7132

VL - 39

SP - 308

EP - 319

JO - Journal of Korean Society for Atmospheric Environment

JF - Journal of Korean Society for Atmospheric Environment

IS - 3

ER -

Seasonal Characteristics of HONO Variations in Seoul during 2021~2022

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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