Elucidate the formation mechanism of particulate nitrate based on direct radical observations in the Yangtze River Delta summer 2019 DOI Creative Commons
Tianyu Zhai, Keding Lu, Haichao Wang

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(4), P. 2379 - 2391

Published: Feb. 21, 2023

Abstract. Particulate nitrate (NO3-) is one of the dominant components fine particles in China, especially during pollution episodes, and has a significant impact on human health, air quality, climate. Here comprehensive field campaign that focuses atmospheric oxidation capacity aerosol formation their effects Yangtze River Delta (YRD) was conducted from May to June 2019 at regional site Changzhou, Jiangsu Province China. The concentrations NO3-, OH radicals, N2O5, NO2, O3, relevant parameters were measured simultaneously. We showed high NO3- mass concentration with 10.6 ± 8.9 µg m−3 average, which accounted for 38.3 % total water-soluble particulate 32.0 PM2.5, followed by proportion sulfate, ammonium, chloride 26.0 %, 18.0 2.0 respectively. This result confirmed heavy eastern China happened not only winter, but also summer. study's ratio (NOR) emphasized solid fast YRD. It found + NO2 daytime dominated clean days, while N2O5 hydrolysis vastly enhanced became comparable polluted days (67.2 30.2 respectively). updated observed-constraint Empirical Kinetic Modeling Approach (EKMA) used assess kinetic controlling factors both local O3 productions, indicated O3-targeted scheme (VOCs : NOx = 2:1) adequate mitigating coordinately summertime this region. Our results promote understanding mechanisms mitigation based observation model simulation call more attention summertime.

Language: Английский

Important contribution of N2O5 hydrolysis to the daytime nitrate in Xi'an, China during haze periods: Isotopic analysis and WRF-Chem model simulation DOI
Can Wu,

Lang Liu,

Gehui Wang

et al.

Environmental Pollution, Journal Year: 2021, Volume and Issue: 288, P. 117712 - 117712

Published: July 5, 2021

Language: Английский

Citations

46
Impact of meteorological condition changes on air quality and particulate chemical composition during the COVID-19 lockdown DOI Open Access
Jing Ding, Qili Dai, Yafei Li

et al.

Journal of Environmental Sciences, Journal Year: 2021, Volume and Issue: 109, P. 45 - 56

Published: Feb. 26, 2021

Language: Английский

Citations

43
Characterizing nitrate radical budget trends in Beijing during 2013–2019 DOI
Haichao Wang, Keding Lu, Shiyi Chen

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 795, P. 148869 - 148869

Published: July 7, 2021

Language: Английский

Citations

43
A diurnal story of Δ17O($$\rm{NO}_{3}^{-}$$) in urban Nanjing and its implication for nitrate aerosol formation DOI Creative Commons
Yanlin Zhang, Wenqi Zhang,

Mei‐Yi Fan

et al.

npj Climate and Atmospheric Science, Journal Year: 2022, Volume and Issue: 5(1)

Published: June 21, 2022

Abstract Inorganic nitrate production is critical in atmospheric chemistry that reflects the oxidation capacity and acidity of atmosphere. Here we use oxygen anomaly (Δ 17 O( $$\rm{NO}_{3}^{-}$$ NO3− )) high-time-resolved (3 h) aerosols to explore chemical mechanisms evolution fine particles during winter Nanjing, a megacity China. The continuous Δ ) observation suggested dominance nocturnal (NO 3 + HC/H 2 O N 5 H O/Cl − formation wintertime. Significant diurnal variations pathways were found. contribution increased at night peaked (72%) midnight. Particularly, became more important for process air pollution aggravation. In contrast, daytime OH/H O) with sunrise showed highest fraction (48%) around noon. hydrolysis on particle surfaces played an role haze days. addition, reaction NO OH radicals was found dominate after reset by precipitation events. These results suggest importance observations exploring dynamic reactive nitrogen chemistry.

Language: Английский

Citations

34
Elucidate the formation mechanism of particulate nitrate based on direct radical observations in the Yangtze River Delta summer 2019 DOI Creative Commons
Tianyu Zhai, Keding Lu, Haichao Wang

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(4), P. 2379 - 2391

Published: Feb. 21, 2023

Abstract. Particulate nitrate (NO3-) is one of the dominant components fine particles in China, especially during pollution episodes, and has a significant impact on human health, air quality, climate. Here comprehensive field campaign that focuses atmospheric oxidation capacity aerosol formation their effects Yangtze River Delta (YRD) was conducted from May to June 2019 at regional site Changzhou, Jiangsu Province China. The concentrations NO3-, OH radicals, N2O5, NO2, O3, relevant parameters were measured simultaneously. We showed high NO3- mass concentration with 10.6 ± 8.9 µg m−3 average, which accounted for 38.3 % total water-soluble particulate 32.0 PM2.5, followed by proportion sulfate, ammonium, chloride 26.0 %, 18.0 2.0 respectively. This result confirmed heavy eastern China happened not only winter, but also summer. study's ratio (NOR) emphasized solid fast YRD. It found + NO2 daytime dominated clean days, while N2O5 hydrolysis vastly enhanced became comparable polluted days (67.2 30.2 respectively). updated observed-constraint Empirical Kinetic Modeling Approach (EKMA) used assess kinetic controlling factors both local O3 productions, indicated O3-targeted scheme (VOCs : NOx = 2:1) adequate mitigating coordinately summertime this region. Our results promote understanding mechanisms mitigation based observation model simulation call more attention summertime.

Language: Английский

Citations

19