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Discussion papers
https://doi.org/10.5194/acp-2019-1062
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-1062
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 22 Jan 2020

Submitted as: research article | 22 Jan 2020

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This preprint is currently under review for the journal ACP.

Improved inversion of aerosol components in the atmospheric column from remote sensing data

Ying Zhang1, Zhengqiang Li1, Yu Chen2, Gerrit de Leeuw3, Chi Zhang1, Yisong Xie1, and Kaitao Li1 Ying Zhang et al.
  • 1State Environmental Protection Key Laboratory of Satellite Remote Sensing, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China
  • 2Public Meteorological Service Center, China Meteorological Administration, Beijing 100081, China
  • 3Finnish Meteorological Institute, Climate Research, Helsinki FI-00101, Finland

Abstract. A method to calculate the complex refractive index of a multicomponent liquid system is introduced into the retrieval of atmospheric columnar aerosol components from optical remote sensing data. The aerosol components comprise five species, combining eight sub-components including black carbon (BC), water-soluble (WSOM) and water-insoluble organic matter (WIOM), ammonium nitrate (AN), sodium chloride (SC), dust-like (DU), and aerosol water in the fine and coarse modes (AWf and AWc). The uncertainty in the retrieval results is analyzed based on the simulation of typical models, showing that the complex refractive index obtained from instantaneous optical-physical inversion compares very well with that obtained from chemical estimation. The algorithm was used to retrieve the columnar aerosol components over China using the ground-based remote sensing measurements from the Sun-sky radiometer Observation NETwork (SONET) in the period from 2010 to 2016. The results were used to analyze the regional distribution and interannual variation. The analysis shows that the atmospheric columnar DU component is dominant in the northern region of China, whereas the AW is higher in the southern coastal region. The AN significantly decreased from 2011 to 2016, by 26.8 mg m−2, which is inseparable from China's environmental control policies.

Ying Zhang et al.

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Latest update: 25 Feb 2020
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Short summary
The observation of atmospheric aerosol components plays an important role in reducing the uncertainty of climate assessment. In this study, an improved remote sensing method which can better distinguish scattering components is developed, and the aerosol components in atmospheric column over China are retrieved based on Sun-sky radiometer Observation NETwork (SONET). The components distribution shows there could be sea salt component in northwest China from a paleo-marine source in desert.
The observation of atmospheric aerosol components plays an important role in reducing the...
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