Seasonal variations of C1-C4alkyl nitrates at a coastal site in Hong Kong: Influence of photochemical formation and oceanic emissions

Junwei Song; Yingyi Zhang; Yu Huang; Kin Fai Ho; Zibing Yuan; Zhenhao Ling; Xiaojun Niu; Yuan Gao; Long Cui; Peter K.K. Louie; Shuncheng Lee; Senchao Lai

doi:10.1016/j.chemosphere.2017.11.104

Seasonal variations of C₁-C₄alkyl nitrates at a coastal site in Hong Kong: Influence of photochemical formation and oceanic emissions

Junwei Song, Yingyi Zhang, Yu Huang, Kin Fai Ho, Zibing Yuan, Zhenhao Ling, Xiaojun Niu, Yuan Gao, Long Cui, Peter K.K. Louie, Shuncheng Lee, Senchao Lai

Research output: Journal article publication › Journal article › Academic research › peer-review

9 Citations (Scopus)

Abstract

Five C ₁-C ₄ alkyl nitrates (RONO ₂) were measured at a coastal site in Hong Kong in four selected months of 2011 and 2012. The total mixing ratios of C ₁-C ₄ RONO ₂ (Σ ₅RONO ₂) ranged from 15.4 to 143.7 pptv with an average of 65.9 ± 33.0 pptv. C ₃-C ₄ RONO ₂ (2-butyl nitrate and 2-propyl nitrate) were the most abundant RONO ₂ during the entire sampling period. The mixing ratios of C ₃-C ₄ RONO ₂ were higher in winter than those in summer, while the ones of methyl nitrate (MeONO ₂) were higher in summer than those in winter. Source analysis suggests that C ₂-C ₄ RONO ₂ were mainly derived from photochemical formation along with biomass burning (58.3–71.6%), while ocean was a major contributor to MeONO ₂ (53.8%) during the whole sampling period. The photochemical evolution of C ₂-C ₄ RONO ₂ was investigated, and found to be dominantly produced by the parent hydrocarbon oxidation. The notable enrichment of MeONO ₂ over C ₃-C ₄ RONO ₂ was observed in a summer episode when the air masses originating from the South China Sea (SCS) and MeONO ₂ was dominantly derived from oceanic emissions. In order to improve the accuracy of ozone (O ₃) prediction in coastal environment, the relative contribution of RONO ₂ from oceanic emissions versus photochemical formation and their coupling effects on O ₃ production should be taken into account in future studies.

Original language	English
Pages (from-to)	275-284
Number of pages	10
Journal	Chemosphere
Volume	194
DOIs	https://doi.org/10.1016/j.chemosphere.2017.11.104
Publication status	Published - 1 Mar 2018

Keywords

Alkyl nitrates
Marine emissions
Ozone
Photochemical production
Seasonality

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

More information

10.1016/j.chemosphere.2017.11.104

http://hdl.handle.net/10397/74956

Cite this

@article{fbafb6d2c69440d193d1c5e5c47ab0e6,

title = "Seasonal variations of C1-C4alkyl nitrates at a coastal site in Hong Kong: Influence of photochemical formation and oceanic emissions",

abstract = "Five C 1-C 4 alkyl nitrates (RONO 2) were measured at a coastal site in Hong Kong in four selected months of 2011 and 2012. The total mixing ratios of C 1-C 4 RONO 2 (Σ 5RONO 2) ranged from 15.4 to 143.7 pptv with an average of 65.9 ± 33.0 pptv. C 3-C 4 RONO 2 (2-butyl nitrate and 2-propyl nitrate) were the most abundant RONO 2 during the entire sampling period. The mixing ratios of C 3-C 4 RONO 2 were higher in winter than those in summer, while the ones of methyl nitrate (MeONO 2) were higher in summer than those in winter. Source analysis suggests that C 2-C 4 RONO 2 were mainly derived from photochemical formation along with biomass burning (58.3–71.6%), while ocean was a major contributor to MeONO 2 (53.8%) during the whole sampling period. The photochemical evolution of C 2-C 4 RONO 2 was investigated, and found to be dominantly produced by the parent hydrocarbon oxidation. The notable enrichment of MeONO 2 over C 3-C 4 RONO 2 was observed in a summer episode when the air masses originating from the South China Sea (SCS) and MeONO 2 was dominantly derived from oceanic emissions. In order to improve the accuracy of ozone (O 3) prediction in coastal environment, the relative contribution of RONO 2 from oceanic emissions versus photochemical formation and their coupling effects on O 3 production should be taken into account in future studies. ",

keywords = "Alkyl nitrates, Marine emissions, Ozone, Photochemical production, Seasonality",

author = "Junwei Song and Yingyi Zhang and Yu Huang and Ho, {Kin Fai} and Zibing Yuan and Zhenhao Ling and Xiaojun Niu and Yuan Gao and Long Cui and Louie, {Peter K.K.} and Shuncheng Lee and Senchao Lai",

year = "2018",

month = mar,

day = "1",

doi = "10.1016/j.chemosphere.2017.11.104",

language = "English",

volume = "194",

pages = "275--284",

journal = "Chemosphere",

issn = "0045-6535",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Seasonal variations of C1-C4alkyl nitrates at a coastal site in Hong Kong: Influence of photochemical formation and oceanic emissions

AU - Song, Junwei

AU - Zhang, Yingyi

AU - Huang, Yu

AU - Ho, Kin Fai

AU - Yuan, Zibing

AU - Ling, Zhenhao

AU - Niu, Xiaojun

AU - Gao, Yuan

AU - Cui, Long

AU - Louie, Peter K.K.

AU - Lee, Shuncheng

AU - Lai, Senchao

PY - 2018/3/1

Y1 - 2018/3/1

N2 - Five C 1-C 4 alkyl nitrates (RONO 2) were measured at a coastal site in Hong Kong in four selected months of 2011 and 2012. The total mixing ratios of C 1-C 4 RONO 2 (Σ 5RONO 2) ranged from 15.4 to 143.7 pptv with an average of 65.9 ± 33.0 pptv. C 3-C 4 RONO 2 (2-butyl nitrate and 2-propyl nitrate) were the most abundant RONO 2 during the entire sampling period. The mixing ratios of C 3-C 4 RONO 2 were higher in winter than those in summer, while the ones of methyl nitrate (MeONO 2) were higher in summer than those in winter. Source analysis suggests that C 2-C 4 RONO 2 were mainly derived from photochemical formation along with biomass burning (58.3–71.6%), while ocean was a major contributor to MeONO 2 (53.8%) during the whole sampling period. The photochemical evolution of C 2-C 4 RONO 2 was investigated, and found to be dominantly produced by the parent hydrocarbon oxidation. The notable enrichment of MeONO 2 over C 3-C 4 RONO 2 was observed in a summer episode when the air masses originating from the South China Sea (SCS) and MeONO 2 was dominantly derived from oceanic emissions. In order to improve the accuracy of ozone (O 3) prediction in coastal environment, the relative contribution of RONO 2 from oceanic emissions versus photochemical formation and their coupling effects on O 3 production should be taken into account in future studies.

AB - Five C 1-C 4 alkyl nitrates (RONO 2) were measured at a coastal site in Hong Kong in four selected months of 2011 and 2012. The total mixing ratios of C 1-C 4 RONO 2 (Σ 5RONO 2) ranged from 15.4 to 143.7 pptv with an average of 65.9 ± 33.0 pptv. C 3-C 4 RONO 2 (2-butyl nitrate and 2-propyl nitrate) were the most abundant RONO 2 during the entire sampling period. The mixing ratios of C 3-C 4 RONO 2 were higher in winter than those in summer, while the ones of methyl nitrate (MeONO 2) were higher in summer than those in winter. Source analysis suggests that C 2-C 4 RONO 2 were mainly derived from photochemical formation along with biomass burning (58.3–71.6%), while ocean was a major contributor to MeONO 2 (53.8%) during the whole sampling period. The photochemical evolution of C 2-C 4 RONO 2 was investigated, and found to be dominantly produced by the parent hydrocarbon oxidation. The notable enrichment of MeONO 2 over C 3-C 4 RONO 2 was observed in a summer episode when the air masses originating from the South China Sea (SCS) and MeONO 2 was dominantly derived from oceanic emissions. In order to improve the accuracy of ozone (O 3) prediction in coastal environment, the relative contribution of RONO 2 from oceanic emissions versus photochemical formation and their coupling effects on O 3 production should be taken into account in future studies.

KW - Alkyl nitrates

KW - Marine emissions

KW - Ozone

KW - Photochemical production

KW - Seasonality

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U2 - 10.1016/j.chemosphere.2017.11.104

DO - 10.1016/j.chemosphere.2017.11.104

M3 - Journal article

C2 - 29216547

SN - 0045-6535

VL - 194

SP - 275

EP - 284

JO - Chemosphere

JF - Chemosphere

ER -