Light Absorption Properties of Brown Carbon Aerosol During Winter at a Polluted Rural Site in the North China Plain DOI Creative Commons

Yanan Tao,

Zheng Yang,

Xinyu Tan

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(11), P. 1294 - 1294

Published: Oct. 28, 2024

Brown carbon aerosols (BrC), a subfraction of organic aerosols, significantly influence the atmospheric environment, climate and human health. The North China Plain (NCP) is hotspot for BrC research in China, yet our understanding optical properties rural regions still very limited. In this study, we characterize chemical components light absorption at site during winter NCP. average mass concentration PM1 135.1 ± 82.3 μg/m3; organics nitrate are main PM1. coefficient (babs,BrC) 53.6 45.7 Mm−1, accounting 39.5 10.2% total 370 nm. Diurnal variations reveal that babs,BrC lower afternoon, attributed to evolution planetary boundary layers. mainly emitted locally, both aqueous phase photooxidation reactions can increase babs,BrC. Notably, reduced when RH > 65%. During foggy conditions, facilitate formation secondary contribute bleaching BrC. This process ultimately causes decrease Ångström exponent (AAE) efficiency (MAE). contrast, babs,BrC, along with AAE MAE, rise due substantial primary emissions. study enhances polluted

Language: Английский

Redox Potential and Cytotoxicity of N-heterocyclic Aromatic SOA from Indole oxidation in the Atmosphere DOI
Chunlin Li, Dongmei Cai, Michal Pardo

et al.

Atmospheric Environment, Journal Year: 2025, Volume and Issue: unknown, P. 121049 - 121049

Published: Jan. 1, 2025

Language: Английский

Citations

1
Light Absorption Properties of Brown Carbon Aerosol During Winter at a Polluted Rural Site in the North China Plain DOI Creative Commons

Yanan Tao,

Zheng Yang,

Xinyu Tan

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(11), P. 1294 - 1294

Published: Oct. 28, 2024

Brown carbon aerosols (BrC), a subfraction of organic aerosols, significantly influence the atmospheric environment, climate and human health. The North China Plain (NCP) is hotspot for BrC research in China, yet our understanding optical properties rural regions still very limited. In this study, we characterize chemical components light absorption at site during winter NCP. average mass concentration PM1 135.1 ± 82.3 μg/m3; organics nitrate are main PM1. coefficient (babs,BrC) 53.6 45.7 Mm−1, accounting 39.5 10.2% total 370 nm. Diurnal variations reveal that babs,BrC lower afternoon, attributed to evolution planetary boundary layers. mainly emitted locally, both aqueous phase photooxidation reactions can increase babs,BrC. Notably, reduced when RH > 65%. During foggy conditions, facilitate formation secondary contribute bleaching BrC. This process ultimately causes decrease Ångström exponent (AAE) efficiency (MAE). contrast, babs,BrC, along with AAE MAE, rise due substantial primary emissions. study enhances polluted

Language: Английский

Citations

0