Concentration and sources of atmospheric nitrous acid (HONO) at an urban site in Western China

Ru Jin Huang; Lu Yang; Junji Cao; Qiyuan Wang; Xuexi Tie; Kin Fai Ho; Zhenxing Shen; Renjian Zhang; Guohui Li; Chongshu Zhu; Ningning Zhang; Wenting Dai; Jiamao Zhou; Suixin Liu; Yang Chen; Jun Chen; Colin D. O'Dowd

doi:10.1016/j.scitotenv.2017.02.166

Concentration and sources of atmospheric nitrous acid (HONO) at an urban site in Western China

Ru Jin Huang
, Lu Yang
, Junji Cao
, Qiyuan Wang
, Xuexi Tie
, Kin Fai Ho
, Zhenxing Shen
, Renjian Zhang
, Guohui Li
, Chongshu Zhu
, Ningning Zhang
, Wenting Dai
, Jiamao Zhou
, Suixin Liu
, Yang Chen
, Jun Chen
, Colin D. O'Dowd

Physics

Institute of Earth Environment
University of Galway
Xiamen Huaxia University
Shanghai Key Laboratory of Meteorology and Health
Chinese University of Hong Kong
Xi'an Jiaotong University
Institute of Atmospheric Physics Chinese Academy of Sciences
Chongqing Institute of Green and Intelligent Technology
University of Shanghai for Science and Technology

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

98 Citations (Scopus)

Abstract

Highly time-resolved measurements of nitrous acid (HONO) were carried out with a highly sensitive long path absorption photometer (LOPAP) at an urban site of Xi'an in Western China from 24 July to 6 August 2015 to investigate the atmospheric variations, sources, and formation pathways of HONO. The concentrations of HONO vary from 0.02 to 4.3 ppbv with an average of 1.12 ppbv for the entire measurement period. The variation trends of HONO and NO₂ are very similar and positively correlated which, together with the similar diurnal profiles of HONO/NO₂ ratio and HONO, suggest the importance of heterogeneous conversion of HONO from NO₂. The nocturnal HONO level is governed by heterogeneous formation from NO₂, followed by homogeneous formation of NO with OH and then by direct emissions. Further, it is found that the heterogeneous formation of HONO is largely affected by relative humidity and aerosol surface. Daytime HONO budget analysis indicates that an additional unknown source with HONO production rate of 0.75 ppbv h^− 1 is required to explain the observed HONO concentration, which contributes 60.8% of the observed daytime HONO.

Original language	English
Pages (from-to)	165-172
Number of pages	8
Journal	Science of the Total Environment
Volume	593-594
DOIs	https://doi.org/10.1016/j.scitotenv.2017.02.166
Publication status	Published - 1 Sept 2017

Keywords

HONO source and formation
Heterogeneous conversion
Nitrogen oxides
Nitrous acid

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10.1016/j.scitotenv.2017.02.166

Cite this

Huang, R. J., Yang, L., Cao, J., Wang, Q., Tie, X., Ho, K. F., Shen, Z., Zhang, R., Li, G., Zhu, C., Zhang, N., Dai, W., Zhou, J., Liu, S., Chen, Y., Chen, J., & O'Dowd, C. D. (2017). Concentration and sources of atmospheric nitrous acid (HONO) at an urban site in Western China. Science of the Total Environment, 593-594, 165-172. https://doi.org/10.1016/j.scitotenv.2017.02.166

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title = "Concentration and sources of atmospheric nitrous acid (HONO) at an urban site in Western China",

abstract = "Highly time-resolved measurements of nitrous acid (HONO) were carried out with a highly sensitive long path absorption photometer (LOPAP) at an urban site of Xi'an in Western China from 24 July to 6 August 2015 to investigate the atmospheric variations, sources, and formation pathways of HONO. The concentrations of HONO vary from 0.02 to 4.3 ppbv with an average of 1.12 ppbv for the entire measurement period. The variation trends of HONO and NO2 are very similar and positively correlated which, together with the similar diurnal profiles of HONO/NO2 ratio and HONO, suggest the importance of heterogeneous conversion of HONO from NO2. The nocturnal HONO level is governed by heterogeneous formation from NO2, followed by homogeneous formation of NO with OH and then by direct emissions. Further, it is found that the heterogeneous formation of HONO is largely affected by relative humidity and aerosol surface. Daytime HONO budget analysis indicates that an additional unknown source with HONO production rate of 0.75 ppbv h− 1 is required to explain the observed HONO concentration, which contributes 60.8\% of the observed daytime HONO.",

keywords = "HONO source and formation, Heterogeneous conversion, Nitrogen oxides, Nitrous acid",

author = "Huang, \{Ru Jin\} and Lu Yang and Junji Cao and Qiyuan Wang and Xuexi Tie and Ho, \{Kin Fai\} and Zhenxing Shen and Renjian Zhang and Guohui Li and Chongshu Zhu and Ningning Zhang and Wenting Dai and Jiamao Zhou and Suixin Liu and Yang Chen and Jun Chen and O'Dowd, \{Colin D.\}",

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doi = "10.1016/j.scitotenv.2017.02.166",

language = "English",

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journal = "Science of the Total Environment",

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TY - JOUR

T1 - Concentration and sources of atmospheric nitrous acid (HONO) at an urban site in Western China

AU - Huang, Ru Jin

AU - Yang, Lu

AU - Cao, Junji

AU - Wang, Qiyuan

AU - Tie, Xuexi

AU - Ho, Kin Fai

AU - Shen, Zhenxing

AU - Zhang, Renjian

AU - Li, Guohui

AU - Zhu, Chongshu

AU - Zhang, Ningning

AU - Dai, Wenting

AU - Zhou, Jiamao

AU - Liu, Suixin

AU - Chen, Yang

AU - Chen, Jun

AU - O'Dowd, Colin D.

PY - 2017/9/1

Y1 - 2017/9/1

N2 - Highly time-resolved measurements of nitrous acid (HONO) were carried out with a highly sensitive long path absorption photometer (LOPAP) at an urban site of Xi'an in Western China from 24 July to 6 August 2015 to investigate the atmospheric variations, sources, and formation pathways of HONO. The concentrations of HONO vary from 0.02 to 4.3 ppbv with an average of 1.12 ppbv for the entire measurement period. The variation trends of HONO and NO2 are very similar and positively correlated which, together with the similar diurnal profiles of HONO/NO2 ratio and HONO, suggest the importance of heterogeneous conversion of HONO from NO2. The nocturnal HONO level is governed by heterogeneous formation from NO2, followed by homogeneous formation of NO with OH and then by direct emissions. Further, it is found that the heterogeneous formation of HONO is largely affected by relative humidity and aerosol surface. Daytime HONO budget analysis indicates that an additional unknown source with HONO production rate of 0.75 ppbv h− 1 is required to explain the observed HONO concentration, which contributes 60.8% of the observed daytime HONO.

AB - Highly time-resolved measurements of nitrous acid (HONO) were carried out with a highly sensitive long path absorption photometer (LOPAP) at an urban site of Xi'an in Western China from 24 July to 6 August 2015 to investigate the atmospheric variations, sources, and formation pathways of HONO. The concentrations of HONO vary from 0.02 to 4.3 ppbv with an average of 1.12 ppbv for the entire measurement period. The variation trends of HONO and NO2 are very similar and positively correlated which, together with the similar diurnal profiles of HONO/NO2 ratio and HONO, suggest the importance of heterogeneous conversion of HONO from NO2. The nocturnal HONO level is governed by heterogeneous formation from NO2, followed by homogeneous formation of NO with OH and then by direct emissions. Further, it is found that the heterogeneous formation of HONO is largely affected by relative humidity and aerosol surface. Daytime HONO budget analysis indicates that an additional unknown source with HONO production rate of 0.75 ppbv h− 1 is required to explain the observed HONO concentration, which contributes 60.8% of the observed daytime HONO.

KW - HONO source and formation

KW - Heterogeneous conversion

KW - Nitrogen oxides

KW - Nitrous acid

UR - https://www.scopus.com/pages/publications/85015876268

U2 - 10.1016/j.scitotenv.2017.02.166

DO - 10.1016/j.scitotenv.2017.02.166

M3 - Article

SN - 0048-9697

VL - 593-594

SP - 165

EP - 172

JO - Science of the Total Environment

JF - Science of the Total Environment

ER -

Concentration and sources of atmospheric nitrous acid (HONO) at an urban site in Western China

Abstract

Keywords

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