Articles | Volume 26, issue 6
https://doi.org/10.5194/acp-26-4231-2026
© 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-26-4231-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Mar 2026
Research article |
| 26 Mar 2026
| 26 Mar 2026
Investigation of aerosol transport flux structure over Beijing based on lidar observations and the impact of dust transport on air quality
Zhengguo Tian
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, 311231, China
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, 311231, China
Si Liu
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, 311231, China
Cheng Yao
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, 311231, China
Tong Lu
School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, 430079, China
Weijie Zou
School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, 430079, China
Zhenping Yin
School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, 430079, China
School of Earth and Space Science and Technology, Wuhan University, Wuhan, 430072, China
State Observatory for Atmospheric Remote Sensing, Wuhan, 430072, China
State Key Laboratory of Severe Weather Meteorological Science and Technology & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China
Bin Zhang
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, 311231, China
Daru Chen
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou, 311231, China
Zhichao Bu
Meteorological Observation Center, China Meteorological Administration, Beijing, 100081, China
Yubao Chen
Meteorological Observation Center, China Meteorological Administration, Beijing, 100081, China
Xuan Wang
School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, 430079, China
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EGUsphere, https://doi.org/10.5194/egusphere-2026-4322, https://doi.org/10.5194/egusphere-2026-4322, 2026
This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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Winds carry vast amounts of Saharan dust across the Atlantic Ocean, influencing climate, air quality, and ocean ecosystems. Within the Aerosol Comparisons between Observations and Models (AeroCom) project, we evaluated 17 numerical models against observations. Models deposit dust too quickly, so too little reaches the Caribbean. Better simulations require emitting larger particles, treating their non-spherical shapes, and capturing processes that keep dust aloft during transport.
Julian Hofer, Holger Baars, Zhenping Yin, Andi Klamt, Martin Radenz, Leonard König, Athena A. Floutsi, Cristofer Jimenez, Moritz Haarig, Dietrich Althausen, Benedikt Gast, Håvard S. Buholdt, Nathan Skupin, Jonas Neumann, Sabur F. Abdullozoda, Abduvosit N. Makhmudov, Johannes Bühl, Ronny Engelmann, Ulla Wandinger, and Albert Ansmann
EGUsphere, https://doi.org/10.5194/egusphere-2026-3928, https://doi.org/10.5194/egusphere-2026-3928, 2026
This preprint is open for discussion and under review for Atmospheric Measurement Techniques (AMT).
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A comparison of manually and automatically analyzed lidar profiles of aerosol optical properties is presented. The manual analysis was performed using a custom software in multiple analyses steps based on visual inspection of the lidar signals. The automatic analysis was performed using an automatic processing chain. The comparison shows good agreement and demonstrates the suitability of the automatic retrievals for various applications of aerosol optical property profiles.
Zhaolong Wu, Patric Seifert, Yun He, Holger Baars, Cristofer Jimenez, Chengcai Li, Jing Li, Albert Ansmann, and Chuanfeng Zhao
Atmos. Chem. Phys., 26, 11491–11523, https://doi.org/10.5194/acp-26-11491-2026, https://doi.org/10.5194/acp-26-11491-2026, 2026
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Using a full year of laser and radar observations in Beijing, this study shows when and where flat ice crystals tend to align horizontally instead of randomly, which suggests that flat ice crystals are most common in moderately cold, weakly turbulent clouds and often form below supercooled liquid water. This new finding can help weather and climate models better represent ice clouds.
Weijie Zou, Zhenping Yin, Tingxin Sun, Zhichao Bu, Yaru Dai, Haofei Wang, Longlong Wang, Yun He, Shuangliang Li, Jiarui Cheng, Xuan Wang, Siwei Li, and Detlef Müller
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This preprint is open for discussion and under review for Atmospheric Measurement Techniques (AMT).
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Cloud layers can be identified from ground-based laser observations, but stable and consistent results across different instruments and sites remain challenging. This study develops a transferable artificial intelligence method using multi-wavelength lidar signals. It improves cloud boundary detection, works with limited expert labels, and is tested at independent sites with weather balloon checks. It supports reliable automated cloud and aerosol processing.
Cheng Yao, Longlong Wang, Aoxiang Huang, Bin Zhang, Marija Bervida Mačak, Luka Drinovec, Asta Gregorič, Fei Gao, Janja Vaupotič, Miloš Miler, Mateja Gosar, Zhangwei Yu, Daru Chen, Griša Močnik, and Samo Stanič
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This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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Aerosols affect climate by scattering and absorbing sunlight and heat. Light detection and ranging instruments can track aerosol distributions, but turning their signals into atmospheric information depends on particle size, absorption, and humidity. We developed a ground-measurement method and tested it in Slovenia. The results provide optical constraints that support more reliable retrieval of aerosol profile information when different particle types are mixed.
Yun He, Dongzhe Jing, Zhenping Yin, Detlef Müller, Fuchao Liu, Yunpeng Zhang, Yang Yi, Kaiming Huang, and Fan Yi
Atmos. Chem. Phys., 26, 4937–4951, https://doi.org/10.5194/acp-26-4937-2026, https://doi.org/10.5194/acp-26-4937-2026, 2026
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Using polarization lidar observations during 2010–2024, we retrieve the vertical profiles of aerosol backscatter and extinction coefficients of anthropogenic pollution under dry and ambient atmospheric conditions over central China. The year-to-year and seasonal variations in anthropogenic AOD are largely changed after removing hygroscopic growth effect.
Dongzhe Jing, Yun He, Zhenping Yin, Detlef Müller, Kaiming Huang, and Fan Yi
Atmos. Meas. Tech., 19, 389–403, https://doi.org/10.5194/amt-19-389-2026, https://doi.org/10.5194/amt-19-389-2026, 2026
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We statistically analyze the hygroscopic growth characteristics of urban anthropogenic aerosols over Wuhan, a megacity over central China, using lidar observations and Hänel parameterization from 2010 to 2024. Aerosol hygroscopic parameter γ increases from 2014 to 2017 and stabilizes at high levels afterwards, aligning with the changes in NO2-to-SO2 concentration ratio. Moreover, no evident differences are found across seasons, as well as between the free troposphere and boundary layer.
Dongzhe Jing, Yun He, Zhenping Yin, Kaiming Huang, Fuchao Liu, and Fan Yi
Atmos. Chem. Phys., 25, 17047–17067, https://doi.org/10.5194/acp-25-17047-2025, https://doi.org/10.5194/acp-25-17047-2025, 2025
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We present the evolution of tropospheric aerosols over Wuhan, central China, from 2010 to 2024. The analysis highlights the long-term aerosol characteristics and separates natural (dust) and anthropogenic (non-dust) contributions. Emission control policies were highly effective during 2010–2017. However, since 2018, lidar-derived aerosol optical depth (AOD) ceased decreasing and fluctuated, and the decline in PM2.5 concentration also became slower, possibly due to atmospheric chemistry factors.
Ioanna Tsikoudi, Eleni Marinou, Maria Tombrou, Eleni Giannakaki, Emmanouil Proestakis, Konstantinos Rizos, Ville Vakkari, Holger Baars, Annett Skupin, Ronny Engelmann, Zhenping Yin, and Vassilis Amiridis
Atmos. Chem. Phys., 25, 16491–16510, https://doi.org/10.5194/acp-25-16491-2025, https://doi.org/10.5194/acp-25-16491-2025, 2025
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We study the characteristics of the boundary layer over three areas: the tropical Atlantic, the tropical West African continent, and near Cabo Verde using PollyXT and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) lidar measurements, as well as ECMWF (European Centre for Medium-Range Weather Forecasts) data. The findings underline the strengths and limitations of different observational and modeling approaches, and emphasizes on the importance of considering aerosol conditions and local meteorology when interpreting boundary layer dynamics.
Yun He, Goutam Choudhury, Matthias Tesche, Albert Ansmann, Fan Yi, Detlef Müller, and Zhenping Yin
Atmos. Meas. Tech., 18, 5669–5685, https://doi.org/10.5194/amt-18-5669-2025, https://doi.org/10.5194/amt-18-5669-2025, 2025
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We present a global dataset of POlarization LIdar PHOtometer Networking (POLIPHON) dust conversion factors at 532 nm obtained using Aerosol RObotic NETwork (AERONET) observations at 137 sites for ice-nucleating particle (INP) and 123 sites for cloud condensation nucleation (CCN) calculations. We also conduct a comparison of dust CCN concentration profiles derived using both POLIPHON and the independent Optical Modelling of the CALIPSO Aerosol Microphysics (OMCAM) retrieval.
Zhaolong Wu, Patric Seifert, Yun He, Holger Baars, Haoran Li, Cristofer Jimenez, Chengcai Li, and Albert Ansmann
Atmos. Meas. Tech., 18, 3611–3634, https://doi.org/10.5194/amt-18-3611-2025, https://doi.org/10.5194/amt-18-3611-2025, 2025
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Yun He, Dongzhe Jing, Zhenping Yin, Kevin Ohneiser, and Fan Yi
Atmos. Chem. Phys., 24, 11431–11450, https://doi.org/10.5194/acp-24-11431-2024, https://doi.org/10.5194/acp-24-11431-2024, 2024
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We present a long-term ground-based lidar observation of stratospheric aerosols at a mid-latitude site, Wuhan, in central China, from 2010 to 2021. We observed a stratospheric background period from 2013 to mid-2017, along with several perturbations from volcanic aerosols and wildfire-induced smoke. In summer, injected stratospheric aerosols are found to be captured by the Asian monsoon anticyclone, resulting in prolonged residence and regional transport in the mid-latitudes of East Asia.
Longlong Wang, Zhenping Yin, Zhichao Bu, Anzhou Wang, Song Mao, Yang Yi, Detlef Müller, Yubao Chen, and Xuan Wang
Atmos. Meas. Tech., 16, 4307–4318, https://doi.org/10.5194/amt-16-4307-2023, https://doi.org/10.5194/amt-16-4307-2023, 2023
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We report the lidar inter-comparison results with a reference lidar at 1064 nm, in order to homogenize the signals provided by different lidar systems for establishing a lidar network in China. The profiles of relative deviation of lidar signals are less than 5 % within 500–2000 m and 10 % within 2000–5000 m, increasing confidence in the reliability of the signals provided by each lidar system in the channels at 1064 nm for a future lidar network in China.
Huijia Shen, Zhenping Yin, Yun He, Longlong Wang, Yifan Zhan, and Dongzhe Jing
EGUsphere, https://doi.org/10.5194/egusphere-2023-1844, https://doi.org/10.5194/egusphere-2023-1844, 2023
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With space-borne lidar and radar observations, we study two dust-cirrus interaction cases near Midway Island in the central Pacific. Partial cloud parcels show evident feature of the dominance of heterogeneous nucleation. At the upper troposphere, natural INPs such as dust and smoke may result in cooling effect by increasing the cloud cover to reflect more solar radiation and modulate the cirrus microphysical properties via different ice-nucleating regimes.
Athena Augusta Floutsi, Holger Baars, Ronny Engelmann, Dietrich Althausen, Albert Ansmann, Stephanie Bohlmann, Birgit Heese, Julian Hofer, Thomas Kanitz, Moritz Haarig, Kevin Ohneiser, Martin Radenz, Patric Seifert, Annett Skupin, Zhenping Yin, Sabur F. Abdullaev, Mika Komppula, Maria Filioglou, Elina Giannakaki, Iwona S. Stachlewska, Lucja Janicka, Daniele Bortoli, Eleni Marinou, Vassilis Amiridis, Anna Gialitaki, Rodanthi-Elisavet Mamouri, Boris Barja, and Ulla Wandinger
Atmos. Meas. Tech., 16, 2353–2379, https://doi.org/10.5194/amt-16-2353-2023, https://doi.org/10.5194/amt-16-2353-2023, 2023
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DeLiAn is a collection of lidar-derived aerosol intensive optical properties for several aerosol types, namely the particle linear depolarization ratio, the extinction-to-backscatter ratio (lidar ratio) and the Ångström exponent. The data collection is based on globally distributed, long-term, ground-based, multiwavelength, Raman and polarization lidar measurements and currently covers two wavelengths, 355 and 532 nm, for 13 aerosol categories ranging from basic aerosol types to mixtures.
Yun He, Zhenping Yin, Albert Ansmann, Fuchao Liu, Longlong Wang, Dongzhe Jing, and Huijia Shen
Atmos. Meas. Tech., 16, 1951–1970, https://doi.org/10.5194/amt-16-1951-2023, https://doi.org/10.5194/amt-16-1951-2023, 2023
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With the AERONET database, this study derives dust-related conversion factors at oceanic sites used in the POLIPHON method, which can convert lidar-retrieved dust extinction to ice-nucleating particle (INP)- and cloud condensation nuclei (CCN)-relevant parameters. The particle linear depolarization ratio in the AERONET aerosol inversion product is used to identify dust data points. The derived conversion factors can be applied to inverse 3-D global distributions of dust-related INPCs and CCNCs.
Yun He, Zhenping Yin, Fuchao Liu, and Fan Yi
Atmos. Chem. Phys., 22, 13067–13085, https://doi.org/10.5194/acp-22-13067-2022, https://doi.org/10.5194/acp-22-13067-2022, 2022
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A method is proposed to identify the sole presence of heterogeneous nucleation and competition between heterogeneous and homogeneous nucleation for dust-related cirrus clouds by characterizing the relationship between dust ice-nucleating particle concentration calculated from CALIOP using the POLIPHON method and in-cloud ice crystal number concentration from the DARDAR-Nice dataset. Two typical cirrus cases are shown as a demonstration, and the proposed method can be extended to a global scale.
Lei Li, Yevgeny Derimian, Cheng Chen, Xindan Zhang, Huizheng Che, Gregory L. Schuster, David Fuertes, Pavel Litvinov, Tatyana Lapyonok, Anton Lopatin, Christian Matar, Fabrice Ducos, Yana Karol, Benjamin Torres, Ke Gui, Yu Zheng, Yuanxin Liang, Yadong Lei, Jibiao Zhu, Lei Zhang, Junting Zhong, Xiaoye Zhang, and Oleg Dubovik
Earth Syst. Sci. Data, 14, 3439–3469, https://doi.org/10.5194/essd-14-3439-2022, https://doi.org/10.5194/essd-14-3439-2022, 2022
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A climatology of aerosol composition concentration derived from POLDER-3 observations using GRASP/Component is presented. The conceptual specifics of the GRASP/Component approach are in the direct retrieval of aerosol speciation without intermediate retrievals of aerosol optical characteristics. The dataset of satellite-derived components represents scarce but imperative information for validation and potential adjustment of chemical transport models.
Ke Gui, Wenrui Yao, Huizheng Che, Linchang An, Yu Zheng, Lei Li, Hujia Zhao, Lei Zhang, Junting Zhong, Yaqiang Wang, and Xiaoye Zhang
Atmos. Chem. Phys., 22, 7905–7932, https://doi.org/10.5194/acp-22-7905-2022, https://doi.org/10.5194/acp-22-7905-2022, 2022
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This study investigates the aerosol optical and radiative properties and meteorological drivers during two mega SDS events over Northern China in March 2021. The MODIS-retrieved DOD data registered these two events as the most intense episode in the same period in history over the past 20 years. These two extreme SDS events were associated with both atmospheric circulation extremes and local meteorological anomalies that favor enhanced dust emissions in the Gobi Desert.
Yu Zheng, Huizheng Che, Yupeng Wang, Xiangao Xia, Xiuqing Hu, Xiaochun Zhang, Jun Zhu, Jibiao Zhu, Hujia Zhao, Lei Li, Ke Gui, and Xiaoye Zhang
Atmos. Meas. Tech., 15, 2139–2158, https://doi.org/10.5194/amt-15-2139-2022, https://doi.org/10.5194/amt-15-2139-2022, 2022
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Ground-based observations of aerosols and aerosol data verification is important for satellite and climate model modification. Here we present an evaluation of aerosol microphysical, optical and radiative properties measured using a multiwavelength photometer with a highly integrated design and smart control performance. The validation of this product is discussed in detail using AERONET as a reference. This work contributes to reducing AOD uncertainties in China and combating climate change.
Yang Yi, Fan Yi, Fuchao Liu, Yunpeng Zhang, Changming Yu, and Yun He
Atmos. Chem. Phys., 21, 17649–17664, https://doi.org/10.5194/acp-21-17649-2021, https://doi.org/10.5194/acp-21-17649-2021, 2021
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Our lidar observations reveal the complete microphysical process of hydrometeors falling from mid-level stratiform clouds. We find that the surface rainfall begins as supercooled mixed-phase hydrometeors fall out of a liquid parent cloud base. We find also that the collision–coalescence growth of precipitating raindrops and subsequent spontaneous breakup always occur around 0.6 km altitude during surface rainfalls. Our findings provide new insights into stratiform precipitation formation.
Ke Gui, Huizheng Che, Yu Zheng, Hujia Zhao, Wenrui Yao, Lei Li, Lei Zhang, Hong Wang, Yaqiang Wang, and Xiaoye Zhang
Atmos. Chem. Phys., 21, 15309–15336, https://doi.org/10.5194/acp-21-15309-2021, https://doi.org/10.5194/acp-21-15309-2021, 2021
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This study utilized the globally gridded aerosol extinction data from CALIOP during 2007–2019 to investigate the 3D climatology, trends, and meteorological drivers of tropospheric type-dependent aerosols. Results revealed that the planetary boundary layer (PBL) and the free troposphere contribute 62.08 % and 37.92 %, respectively, of the global tropospheric TAOD. Trends in
CALIOP-derived aerosol loading, in particular those partitioned in the PBL, can be explained to a large extent by meteorology.
Yun He, Yunfei Zhang, Fuchao Liu, Zhenping Yin, Yang Yi, Yifan Zhan, and Fan Yi
Atmos. Meas. Tech., 14, 5939–5954, https://doi.org/10.5194/amt-14-5939-2021, https://doi.org/10.5194/amt-14-5939-2021, 2021
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The POLIPHON method can retrieve the height profiles of dust-related particle mass and ice-nucleating particle (INP) concentrations. Applying a dust case data set screening scheme based on the lidar-derived depolarization ratio (rather than Ångström exponent for 440–870 nm and AOD at 532 nm), the mixed-dust-related conversion factors are retrieved from sun photometer observations over Wuhan, China. This method may potentially be extended to regions influenced by mixed dust.
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Short summary
This study investigates aerosol transport flux structure over Beijing and dust transport's impact on air quality using polarization lidar and Doppler wind profiling lidar, focusing on a 2–4 November 2023, winter haze event. It classifies dust and non-dust aerosols via particle depolarization ratio, calculates their vertical/horizontal mass flux profiles with the covariance method, and analyzes meteorological influences.
This study investigates aerosol transport flux structure over Beijing and dust transport's...
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