Observations of glyoxal and methylglyoxal in a suburban area of the Yangtze River Delta, China

被引：13

作者：

Liu, Jingwei ^{[1
,2
]}

Li, Xin ^{[1
,2
,3
]}

Li, Dongqing ^{[1
,2
]}

Xu, Rongjuan ^{[1
,2
]}

Gao, Yaqin ^{[4
]}

Chen, Shiyi ^{[1
,2
]}

Liu, Ying ^{[1
,2
]}

Zhao, Gang ^{[5
]}

Wang, Haichao ^{[1
,2
]}

Wang, Hongli ^{[4
]}

Lou, Shengrong ^{[4
]}

Chen, Mindong ^{[3
]}

Hu, Jianlin ^{[3
]}

Lu, Keding ^{[1
,2
]}

Wu, Zhijun ^{[1
,2
]}

Hu, Min ^{[1
,2
]}

Zeng, Limin ^{[1
,2
]}

Zhang, Yuanhang ^{[1
,2
]}

机构：

[1] Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China

[2] Minist Educ, Int Joint Lab Reg Pollut Control, Beijing 100816, Peoples R China

[3] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing 210044, Peoples R China

[4] Shanghai Acad Environm Sci, State Environm Protect Key Lab Format & Prevent U, Shanghai 200233, Peoples R China

[5] Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing 100871, Peoples R China

来源：

ATMOSPHERIC ENVIRONMENT | 2020年 / 238卷 / 238期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Glyoxal; Methylglyoxal; Biomass burning; Reactive VOC composition; REACTIVE TRACE GASES; HYGROSCOPIC GROWTH; EMISSION FACTORS; SOUTHERN CHINA; FORMALDEHYDE; CARBONYLS; IDENTIFICATION; PARTICLES; CHEMISTRY; EVOLUTION;

D O I：

10.1016/j.atmosenv.2020.117727

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Glyoxal (GLY) and methylglyoxal (MGLY), as tracers of oxidation of volatile organic compounds (VOCs), play an important role in atmospheric chemistry. In this work, the concentrations of these two aldehydes were simultaneously measured online at a regional site in Jiangsu Province (China) during the 2018 EXPLORE-YRD campaign. The maximum measured concentration of GLY and MGLY was 0.47 and 6.68 ppb, respectively. As the campaign site was surrounded by farmland and the observations were recorded during harvest, significant enhancements to the concentration of GLY and MGLY were found owing to agricultural biomass burning. While the enhancement of MGLY relative to CO (0.0059 +/- 0.0012) was found to be consistent with previous study, the corresponding enhancement ratios of GLY were lower (0.0003 +/- 0.0001). The possibility of using the ratios between formaldehyde (HCHO), GLY, and MGLY concentrations as indicators of reactive VOC composition was investigated. Based on measured data and model simulation results, we found that the MGLY to HCHO ratio was sensitive to VOC precursors and reasonably well correlated with the reactivity of aromatics.

引用

页数：12

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