Seasonal variation in particle contribution and aerosol types in Shanghai based on satellite data from MODIS and CALIOP--颗粒学报PARTICUOLOGY

Liu, Q., Liu, X., Liu, T., Kang, Y., Chen, Y., Li, J., & Zhang, H. (2020). Seasonal variation in particle contribution and aerosol types in Shanghai based on satellite data from MODIS and CALIOP. Particuology, 51, 18-25. https://doi.org/10.1016/j.partic.2019.10.001

Seasonal variation in particle contribution and aerosol types in Shanghai based on satellite data from MODIS and CALIOP

Qiong Liu ^{a b}, Xin Liu ^a, Tongqiang Liu ^a, Yanming Kang ^a, Yonghang Chen ^a *, Jiming Li ^c, Hua Zhang ^d

a College of Environmental Science and Engineering, Donghua University, Shanghai, China
b College of Information Science and Technology, Donghua University, Shanghai, China
c Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences, Lanzhou University, Lanzhou, China d State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China

10.1016/j.partic.2019.10.001

Volume 51, August 2020, Pages 18-25

Received 13 February 2019, Revised 24 September 2019, Accepted 10 October 2019, Available online 2 December 2019, Version of Record 11 April 2020.

E-mail: yonghangchen@dhu.edu.cn

Highlights

• Polluted dust, polluted continental and smoke aerosols were the main aerosol types.

• High numbers of fine secondary particles contributed to high AOD values in summer.

• Smoke aerosols relating to local/regional pollution occurred at high altitudes in winter.

Abstract

Although the concentration of atmospheric particulate matter in Shanghai has declined in recent years, aerosols remain one of the major pollutants affecting air quality. Herein, spatio-seasonal variation in aerosol optical properties and aerosol types were studied over a 10-year period (2006–2015) in Shanghai, China, using satellite data from Moderate Resolution Imaging Spectroradiometer (MODIS) and Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). The average aerosol optical depth values for central urban and suburban areas of Shanghai were between 0.9 and 1.0. Clear seasonal variation in aerosol concentrations occurred, causing strongest attenuation in summer and weakest attenuation in autumn. Polluted dust, polluted continental (urban/industrial) and smoke aerosols were the main aerosol types. Desert dust aerosols occurred in the Shanghai area at higher altitudes (greater than 3 km) in spring, related to dusty weather in the north; while in winter, smoke aerosols occurred at high altitudes, related to haze pollution in the north. The aerosols detected in autumn were mainly from local sources, comprising polluted dust, polluted continental, and smoke aerosols. Aerosols in Shanghai clearly reflect both local and regional sources at different times.

Graphical abstract

Keywords

Aerosol optical depth (AOD); Aerosol type; Attenuation; Seasonal variation; Vertical distribution

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