Tang Lizi, Feng Zeyu, Shang Dongjie, Zeng Linghan, Wu Zhijun, Wang Hui, Chen Shiyi, Li Xin, Zeng Limin, Hu Jianlin, Hu Min
State Key Laboratory of Regional Environment and Sustainability, International Joint Laboratory of Regional Pollution Control, Ministry of Education (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing, China.
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing, China.
Nat Commun. 2025 Jul 21;16(1):6720. doi: 10.1038/s41467-025-62011-6.
Atmospheric new particle growth in diameter is the crucial process determining air quality effects raised by secondary aerosols. However, uncertain mechanisms and long-term trends of new particle growth limit the assessments of urban air quality evolution. Here we report an increasing trend of new particle growth rate in responds to anthropogenic emission abatement in urban Beijing during autumn from 2017 to 2021. Oxygenated organic vapors is the key compounds driving this variation of growth rate. While the anthropogenic volatile organic precursor abatement has decreased their total concentrations, the concurrent NO abatement has increased the fractions thus the concentrations of the low-volatility condensable parts, which are the most relevant contributors for growth. The coeffect of anthropogenic abatement on the volatility distribution of oxygenated organic vapors is the mystery of the increasing growth rate. Our findings highlight the importance of coordinated anthropogenic emission controls on air quality improvement.
大气中新粒子的直径增长是决定二次气溶胶对空气质量影响的关键过程。然而，新粒子增长的机制不确定以及长期趋势限制了对城市空气质量演变的评估。在此我们报告，2017年至2021年秋季期间，北京城市新粒子增长率呈上升趋势，这与人为排放减少有关。含氧有机蒸汽是驱动增长率这种变化的关键化合物。虽然人为挥发性有机前体的减少降低了它们的总浓度，但同时进行的NO减排增加了低挥发性可凝部分的比例以及浓度，而这些是对增长最具影响的因素。人为减排对含氧有机蒸汽挥发性分布的协同效应是增长率上升的奥秘。我们的研究结果突出了协调人为排放控制对改善空气质量的重要性。
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