Articles | Volume 26, issue 13
https://doi.org/10.5194/acp-26-9981-2026
© Author(s) 2026. 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-26-9981-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Measurement report: Investigation of regional pollutant transport to Beijing, China based on a unique 528 m platform
Xiaoxue Liu
Colledge of Atmospheric Sciences, Lanzhou University, Lanzhou, China
Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing, China
Pengkun Ma
Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing, China
Yubing Pan
Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing, China
Qianqian Wang
Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing, China
Colledge of Atmospheric Sciences, Lanzhou University, Lanzhou, China
Lei Zhang
Colledge of Atmospheric Sciences, Lanzhou University, Lanzhou, China
Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing, China
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This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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We separated the roles of chemical composition and particle size in influencing absorption Ångström exponent (AAE) using ground and column measurements together with interpretable machine learning. We found that near surface AAE is influenced by higher fine mineral dust and inorganic ions fractions. Fine-mode effective radius has an influence close to black carbon on columnar AAE. Columnar AAE contributes to radiative forcing at the top of the atmosphere comparably to single scattering albedo.
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Preprint archived
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The occurrence of unexpected thermal plumes promotes the increase in PM2.5 concentrations during 10:00–13:00. During 14:00–18:00, small-scale turbulent eddies with timescales less than 15 min or even 2 min contributes to the rapid removal of PM2.5, ejections and sweeps enhance the exchange of pollutants interior and exterior the UCL. During 22:00–07:00, sub-mesoscale motions can enhance pollutant dispersion by driving intermittent turbulence bursts, or by forming organized coherent structures.
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Atmos. Meas. Tech., 17, 3765–3781, https://doi.org/10.5194/amt-17-3765-2024, https://doi.org/10.5194/amt-17-3765-2024, 2024
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Accurate cloud quantification is critical for climate research. We developed a novel computer vision framework using deep neural networks and clustering algorithms for cloud classification and segmentation from ground-based all-sky images. After a full year of observational training, our model achieves over 95 % accuracy on four cloud types. The framework enhances quantitative analysis to support climate research by providing reliable cloud data.
Zhiheng Liao, Meng Gao, Jinqiang Zhang, Jiaren Sun, Jiannong Quan, Xingcan Jia, Yubing Pan, and Shaojia Fan
Atmos. Chem. Phys., 24, 3541–3557, https://doi.org/10.5194/acp-24-3541-2024, https://doi.org/10.5194/acp-24-3541-2024, 2024
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This study collected 1897 ozonesondes from two Chinese megacities (Beijing and Hong Kong) in 2000–2022 to investigate the climatological vertical heterogeneity of lower-tropospheric ozone distribution with a mixing-layer-height-referenced (h-referenced) vertical coordinate system. This vertical coordinate system highlighted O3 stratification features existing at the mixing layer–free troposphere interface and provided a better understanding of O3 pollution in urban regions.
Zhiheng Liao, Jinqiang Zhang, Yubin Pan, Xingcan Jia, Pengkun Ma, Qianqian Wang, Zhigang Cheng, Lindong Dai, and Jiannong Quan
EGUsphere, https://doi.org/10.5194/egusphere-2023-1393, https://doi.org/10.5194/egusphere-2023-1393, 2023
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This study presents the first systematic assessment of observationally constrained UTLS O3 variability over the Northeast Asia region in the framework of upper-level circulation pattern classification. The results indicate that lower-stratospheric O3 exhibits a far stronger sensitivity to upper-level circulation patterns when compared with upper-tropospheric O3. The progression of the East Asian Trough plays a critical role in determining the location and intensity of O3 enhancements.
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EGUsphere, https://doi.org/10.5194/egusphere-2022-776, https://doi.org/10.5194/egusphere-2022-776, 2022
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This paper used the WRF-Chem model to simulate different climatic regions of the Tibetan Plateau with finer resolution from 2004 to 2006 and fond that the dust sources are mainly concentrated in the western part of the plateau, while the dust loading of the northern part is the highest. This suggests that dust in the western area can rapidly fall back to the ground after being blown up, while dust in the north can stay in the atmosphere for a long time. That would be useful to future research.
Huige Di, Yun Yuan, Qing Yan, Wenhui Xin, Shichun Li, Jun Wang, Yufeng Wang, Lei Zhang, and Dengxin Hua
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It is necessary to correctly evaluate the amount of cloud water resources in an area. Currently, there is a lack of effective observation methods for atmospheric column condensate evaluation. We propose a method for atmospheric column condensate by combining millimetre cloud radar, lidar and microwave radiometers. The method can realise determination of atmospheric column condensate. The variation of cloud before precipitation is considered, and the atmospheric column is deduced and obtained.
Yun Lin, Yuan Wang, Bowen Pan, Jiaxi Hu, Song Guo, Misti Levy Zamora, Pengfei Tian, Qiong Su, Yuemeng Ji, Jiayun Zhao, Mario Gomez-Hernandez, Min Hu, and Renyi Zhang
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Severe regional haze events, which are characterized by exceedingly high levels of fine particulate matter (PM), occur frequently in many developing countries (such as China and India), with profound implications for human health, weather, and climate. Our work establishes a synthetic view for the dominant regional features during severe haze events, unraveling rapid in situ PM production and inefficient transport, both of which are amplified by atmospheric stagnation.
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Short summary
Regional transport is a systemic environmental challenge governed by multiple processes. Observations from a unique 528-m tower in Beijing reveal that aerosols vary among air masses originating from different directions, influenced by regional emission sources and reactions during transport. A comparison of pollutants between the 528-m layer and ground level confirms that transported pollutants are mixed down to the surface during daytime, governed primarily by planetary boundary layer process.
Regional transport is a systemic environmental challenge governed by multiple processes....
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