{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:19:39Z","timestamp":1760149179397,"version":"build-2065373602"},"reference-count":58,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2023,7,11]],"date-time":"2023-07-11T00:00:00Z","timestamp":1689033600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Lab. of Environmental Optics and Technology, CAS","award":["2005DP173065-2021-07","SY2022031"],"award-info":[{"award-number":["2005DP173065-2021-07","SY2022031"]}]},{"name":"Meteorological Observation Center of China Meteorological Administration","award":["2005DP173065-2021-07","SY2022031"],"award-info":[{"award-number":["2005DP173065-2021-07","SY2022031"]}]},{"name":"School of Ecology and Environment at Beijing Technology and Business University","award":["2005DP173065-2021-07","SY2022031"],"award-info":[{"award-number":["2005DP173065-2021-07","SY2022031"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Extreme weather events are happening more frequently as a result of global climate change. Dust storms broke out in the spring of 2017 in China and drastically impacted the local air quality. In this study, a variety of data, including aerosol vertical profiles, surface particle concentration, meteorological parameters, and MODIS\u2013derived aerosol optical depth, as well as backward trajectory analysis, were employed to analyze two dust events from April to May in Beijing. The dust plumes were mainly concentrated below 0.8 km, with peak PM10 values of 1000 \u03bcg\u00b7m\u22123 and 300 \u03bcg\u00b7m\u22123 in the two cases. The aerosols showed different vertical distribution characteristics. The pure dust in case 1 from 4 to 5 May 2017 had a longer duration (2 days) and presented a larger aerosol extinction coefficient (2.27 km\u22121 at 355 nm and 1.25 km\u22121 at 532 nm) than that of the mixed dust in case 2 on 17 April 2017 (2.01 km\u22121 at 355 nm and 1.33 km\u22121 at 532 nm). The particle depolarization ratio (PDR) remained constant (0.24 \u00b1 0.03 in case 1) from the surface to 0.8 km in height. In contrast, the PDR profile in the mixed dust (case 2) layer was split into two regions\u2014large values exceeding 0.15 above 0.6 km and small values of 0.11 \u00b1 0.03 below 0.6 km. The influence of meteorological information on aerosol distribution was also investigated, and wind was predominant through the observing period. The pure dust in case 1 was mainly from Mongolia, with strong northwest winds, while the near-surface mixed pollution was caused by the combination of long-transported sand and local emission. Furthermore, lidar-derived profiles of dust mass concentrations in the two cases were presented. This study reveals the vertical characteristics of dust aerosols in the production and dissipation of localized dust events and confirms the efficacy of thorough observations with multiple approaches from the ground to space to monitor dust events in real time.<\/jats:p>","DOI":"10.3390\/rs15143494","type":"journal-article","created":{"date-parts":[[2023,7,12]],"date-time":"2023-07-12T01:01:41Z","timestamp":1689123701000},"page":"3494","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The Aerosol Optical Characteristics in Different Dust Events Based on a 532 nm and 355 nm Polarization Lidar in Beijing"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3335-5444","authenticated-orcid":false,"given":"Zhenyi","family":"Chen","sequence":"first","affiliation":[{"name":"School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China"},{"name":"State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing 100048, China"}]},{"given":"Yifeng","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China"},{"name":"State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing 100048, China"}]},{"given":"Zhiliang","family":"Yao","sequence":"additional","affiliation":[{"name":"School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China"},{"name":"State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing 100048, China"}]},{"given":"Tianshu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China"}]},{"given":"Guangqiang","family":"Fan","sequence":"additional","affiliation":[{"name":"Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China"}]},{"given":"Xinyue","family":"Cao","sequence":"additional","affiliation":[{"name":"School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China"},{"name":"State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing 100048, China"}]},{"given":"Chengli","family":"Ji","sequence":"additional","affiliation":[{"name":"CMA Meteorological Observation Centre, Beijing 100081, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1310","DOI":"10.1007\/s00376-020-0076-9","article-title":"Optical, Radiative and Chemical Characteristics of Aerosol in Changsha City, Central","volume":"37","author":"Wu","year":"2020","journal-title":"China Adv. 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