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Title: Extraordinary dust event over Beijing, China, during April 2006: Lidar, Sun photometric, satellite observations and model validation
Authors: Papayannis, Alexandros D. 
Zhang, Huaiqing 
Amiridis, Vassilis 
Ju, Hongbo 
Chourdakis, Giorgos 
Georgoussis, Georgios 
Pérez García-Pando, Carlos 
Chen, Hongbin 
Goloub, Philippe 
Mamouri, Rodanthi-Elisavet 
Kazadzis, Stelios 
Paronis, Dimitrios 
Tsaknakis, Georgios 
Baldasano, Jose M. 
Major Field of Science: Engineering and Technology
Field Category: Civil Engineering
Keywords: Aerosol;Dust;Dust aerosols
Issue Date: 16-Apr-2007
Source: Geophysical Research Letters, 2007, vol. 34, no. 7
Volume: 34
Issue: 7
Journal: Geophysical Research Letters 
Abstract: An extraordinary dust event over Beijing (April 2006) was followed by a synergy of lidar, Sun photometric and satellite measurements. Extreme aerosol optical depth (AOD) values (1-4) were measured by AERONET and MODIS over Beijing. The size distribution of the particles remained close to 2.5 μm and the single scattering albedo was around 0.92 ± 0.5 (440 nm). Coarse particles contributed to more than 60-80% to the AOD values, indicating the presence of very large particles (Ångström exponent <0.3). Coarse particle contribution to total AOD is associated with the free-tropospheric aerosols calculated by lidar profiles (65%). Lidar vertical profiles with AOD values from AERONET were used to estimate a typical lidar ratio for the dust particles (84 sr) during the most intense dust period. The DREAM forecast model was applied for the accurate description of the dust event evolution. Ground-truth data were used for the validation of DREAM over the Beijing area. Copyright 2007 by the American Geophysical Union.
ISSN: 0094-8276
DOI: 10.1029/2006GL029125
Rights: © Wiley
Type: Article
Affiliation : Cyprus University of Technology 
National Technical University of Athens 
Chinese Academy of Forestry 
National Observatory of Athens 
Raymetrics S.A 
Barcelona Supercomputing Center 
Chinese Academy of Science 
Université des Sciences et Technologies de Lille 
Aristotelian University of Thessaloniki 
Universitat Politècnica de Catalunya 
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