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

被引：86

作者：

Huang, Ru-Jin ^{[1
,2
,3
,4
]}

Yang, Lu ^{[1
]}

Cao, Junji ^{[1
]}

Wang, Qiyuan ^{[1
]}

Tie, Xuexi ^{[1
,5
]}

Ho, Kin-Fai ^{[6
]}

Shen, Zhenxing ^{[7
]}

Zhang, Renjian ^{[8
]}

Li, Guohui ^{[1
]}

Zhu, Chongshu ^{[1
]}

Zhang, Ningning ^{[1
]}

Dai, Wenting ^{[1
]}

Zhou, Jiamao ^{[1
]}

Liu, Suixin ^{[1
]}

Chen, Yang ^{[9
]}

Chen, Jun ^{[10
]}

O'Dowd, Colin D. ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Inst Earth & Environm, Xian 710061, Peoples R China

[2] Natl Univ Ireland Galway, Sch Phys, Galway, Ireland

[3] Natl Univ Ireland Galway, Ctr Climate & Air Pollut Studies, Galway, Ireland

[4] Xiamen Huaxia Univ, Ctr Atmospher & Marine Sci, Xiamen 361024, Peoples R China

[5] Shanghai Key Lab Meteorol & Hlth, Shanghai 200030, Peoples R China

[6] Chinese Univ Hong Kong, Jockey Club Sch Publ Hlth & Primary Care, Hong Kong, Hong Kong, Peoples R China

[7] Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China

[8] Chinese Acad Sci, Inst Atmospher Phys, RCE TEA, Beijing 100029, Peoples R China

[9] Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm CAS, Chongqing 400714, Peoples R China

[10] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2017年 / 593卷

基金：

中国国家自然科学基金;

关键词：

Nitrous acid; Nitrogen oxides; Heterogeneous conversion; HONO source and formation; PEARL RIVER DELTA; MISSING OH SOURCE; HO2; CONCENTRATIONS; CHEMICAL-COMPOSITION; MEGAPOLI SUMMER; FIELD CAMPAIGN; DAYTIME SOURCE; HAZE EVENTS; NORTH CHINA; NO2;

D O I：

10.1016/j.scitotenv.2017.02.166

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 43 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 concen-HONO source and formation tration, which contributes 60.8% of the observed daytime HONO. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：165 / 172

页数：8

共 55 条

[1] Strong daytime production of OH from HNO2 at a rural mountain site -: art. no. L02809 [J].