Articles | Volume 15, issue 4
Geosci. Model Dev., 15, 1821–1840, 2022
https://doi.org/10.5194/gmd-15-1821-2022
Geosci. Model Dev., 15, 1821–1840, 2022
https://doi.org/10.5194/gmd-15-1821-2022
Development and technical paper
03 Mar 2022
Development and technical paper | 03 Mar 2022

A three-dimensional variational data assimilation system for aerosol optical properties based on WRF-Chem v4.0: design, development, and application of assimilating Himawari-8 aerosol observations

Daichun Wang et al.

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Short summary
This paper presents a 3D variational data assimilation system for aerosol optical properties, including aerosol optical thickness (AOT) retrievals and lidar-based aerosol profiles, which was developed for a size-resolved sectional model in WRF-Chem. To directly assimilate aerosol optical properties, an observation operator based on the Mie scattering theory was designed. The results show that Himawari-8 AOT assimilation can significantly improve model aerosol analyses and forecasts.