Aerosol Optical Properties Retrieved from a Prede Sky Radiometer over an Urban Site of Beijing, China

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Author(s)

    • CHE Huizheng CHE Huizheng
    • Key Laboratory for Atmospheric Chemistry (LAC), Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences (CAMS), China
    • SHI Guangyu ZHANG Xiaoye
    • Key Laboratory for Atmospheric Chemistry (LAC), Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences (CAMS), China
    • ZHAO Hujia [他] SHI Guangyu
    • State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, China
    • ZHAO Hujia
    • Key Laboratory for Atmospheric Chemistry (LAC), Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences (CAMS), China|University of Chinese Academy of Sciences, China|Institute of Atmospheric Environment, China Meteorological Administration, China
    • NAKAJIMA Teruyuki
    • Atmosphere and Ocean Research Institute (AORI), The University of Tokyo, Kashiwa, Japan
    • KHATRI Pradeep
    • Center for Environmental Remote Sensing, Chiba University, 1-33 Yayoi-cho, Chiba, Japan
    • TAKAMURA Tamio
    • Center for Environmental Remote Sensing, Chiba University, 1-33 Yayoi-cho, Chiba, Japan
    • WANG Hong
    • Key Laboratory for Atmospheric Chemistry (LAC), Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences (CAMS), China
    • WANG Yaqiang
    • Key Laboratory for Atmospheric Chemistry (LAC), Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences (CAMS), China
    • SUN Junying
    • Key Laboratory for Atmospheric Chemistry (LAC), Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences (CAMS), China

Abstract

 SKYNET is an international research network of ground-based Prede sky radiometers for the observation and monitoring of aerosol-cloud-radiation interactions in the atmosphere. The algorithm developed by SKYNET is SKYRAD.pack, which can be used to process the measurement data of Prede instruments. In this study, the latest SKYRAD.pack software (Version 5.0) has been used to retrieve the aerosol optical properties measured by a SKYNET Prede sky radiometer over an urban site of Beijing, China. Continuous data have been processed over a two-year period, and inversion products, including aerosol optical depth (AOD), Ångström exponent (<i>α</i>), volumes of different aerosol particle size distributions, and single-scattering albedos (SSA), have been analyzed.<br> AOD values were found to vary from 0.11 (5th percentile) to 1.14 (95th percentile) with a median of 0.34 at 500 nm, and the maximum and minimum seasonal <i>α</i> values in Beijing were 1.05 ± 0.36 in summer and 0.82 ± 0.39 in spring. SSA values are higher in summer and spring with a similar value of 0.96 ± 0.03, but lower in winter with a value of 0.93 ± 0.04 at 500 nm. Aerosol particles in Beijing clearly demonstrated bimodal size distributions throughout the year: there were coarser particles in spring and finer particles in summer. The <i>α</i> values increased with AOD, indicating that fine particles play an important role in the optical properties of aerosols in Beijing. Dust type aerosol occurrence accounted for 4.1 %, 5.1 %, 0.5 %, and 1.2 % of all measurements data in spring, summer, autumn, and winter, respectively, according to the dust criteria threshold (<i>α</i> < 0.47 and SSA<sub>400 nm</sub> - SSA<sub>1020 nm</sub> < 0.018).

Journal

  • Journal of the Meteorological Society of Japan. Ser. II

    Journal of the Meteorological Society of Japan. Ser. II 92A(0), 17-31, 2014

    Meteorological Society of Japan

Codes

  • NII Article ID (NAID)
    130004704179
  • NII NACSIS-CAT ID (NCID)
    AA00702524
  • Text Lang
    ENG
  • ISSN
    0026-1165
  • NDL Article ID
    025797751
  • NDL Call No.
    Z54-J645
  • Data Source
    NDL  J-STAGE 
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