Articles | Volume 23, issue 11
https://doi.org/10.5194/acp-23-6241-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-23-6241-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Measurement report
| 
07 Jun 2023
Measurement report |
| 07 Jun 2023
| 07 Jun 2023
Measurement report: Diurnal variations of brown carbon during two distinct seasons in a megacity in northeast China
Yuan Cheng
State Key Laboratory of Urban Water Resource and Environment, School
of Environment, Harbin Institute of Technology, Harbin 150090, China
Xu-bing Cao
State Key Laboratory of Urban Water Resource and Environment, School
of Environment, Harbin Institute of Technology, Harbin 150090, China
State Key Laboratory of Urban Water Resource and Environment, School
of Environment, Harbin Institute of Technology, Harbin 150090, China
Ying-jie Zhong
State Key Laboratory of Urban Water Resource and Environment, School
of Environment, Harbin Institute of Technology, Harbin 150090, China
Qin-qin Yu
State Key Laboratory of Urban Water Resource and Environment, School
of Environment, Harbin Institute of Technology, Harbin 150090, China
Qiang Zhang
Ministry of Education Key Laboratory for Earth System Modeling,
Department of Earth System Science, Tsinghua University, Beijing 100084,
China
Ke-bin He
State Key Joint Laboratory of Environment Simulation and Pollution
Control, School of Environment, Tsinghua University, Beijing 100084, China
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A field campaign was conducted in Northeast China to unfold the responses of aerosol optical properties to the variations of particle sources. We found that the light absorption capacities of brown and black carbon could be effectively enhanced by agricultural fire emissions and secondary aerosol production, respectively. Our results also revealed the distinctiveness of the low-efficiency fires, as such fires could emit special organics and lead to uncommon atmospheric reactions at night.
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long-range transport of aerosols from the continents was also identified.
Youwen Sun, Hao Yin, Cheng Liu, Lin Zhang, Yuan Cheng, Mathias Palm, Justus Notholt, Xiao Lu, Corinne Vigouroux, Bo Zheng, Wei Wang, Nicholas Jones, Changong Shan, Min Qin, Yuan Tian, Qihou Hu, Fanhao Meng, and Jianguo Liu
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Short summary
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Short summary
Brown carbon (BrC) aerosols were explored in the northernmost megacity in China during a frigid winter and an agricultural-fire-impacted spring. BrC was more light absorbing at night for both seasons, with more pronounced diurnal variations in spring, and the dominant drivers were identified as regulations on heavy-duty diesel trucks and open burning, respectively. Agricultural fires resulted in unique absorption spectra of BrC, which were characterized by a distinct peak at ∼365 nm.
Brown carbon (BrC) aerosols were explored in the northernmost megacity in China during a frigid...
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