Articles | Volume 19, issue 20
https://doi.org/10.5194/amt-19-6805-2026
https://doi.org/10.5194/amt-19-6805-2026
Research article
 | 
28 Oct 2026
Research article |  | 28 Oct 2026

A blue-band surface residual correction method for land aerosol optical depth retrieval from DQ-1 WSI

Jingxuan Zhao, Yujing Wang, Hui Chen, Mengjie Zhang, Lili Wang, Xingchuan Yang, Shuo Dong, Wenji Zhao, and Pengfei Ma

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Cited articles

Bilal, M., Qiu, Z., and Lu, X.: A simplified high resolution MODIS Aerosol Retrieval Algorithm (SARA) for use over mixed surfaces, Remote Sens. Environ., 136, 135–145, https://doi.org/10.1016/j.rse.2013.04.014, 2013. 
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Cao, J.: Geometric calibration of the whiskbroom DaQi-1 WSI based on an equivalent linear-array CCD, IEEE T. Geosci. Remote, 61, 5616713, https://doi.org/10.1109/TGRS.2023.3300013, 2023. 
Che, H., Xia, X., Zhu, J., Wang, H., Wang, Y., Sun, J., Zhang, X., and Shi, G.: Aerosol optical properties under the condition of heavy haze over an urban site of Beijing, China, Environ. Sci. Pollut. R., 22, 1043–1053, https://doi.org/10.1007/s11356-014-3415-5, 2015. 
Christensen, M. W., Neubauer, D., Poulsen, C. A., Thomas, G. E., McGarragh, G. R., Povey, A. C., Proud, S. R., and Grainger, R. G.: Unveiling aerosol–cloud interactions – Part 1: Cloud contamination in satellite products enhances the aerosol indirect forcing estimate, Atmos. Chem. Phys., 17, 13151–13164, https://doi.org/10.5194/acp-17-13151-2017, 2017. 
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Satellite estimates of airborne particles can be inaccurate when light reflected by land is poorly estimated. We developed a method for China's DaQi-1 satellite that uses machine learning to correct this land signal while retaining a physics-based calculation. Comparisons with ground observations showed reduced errors in spring and autumn–winter. The method also reduced errors the following spring without retraining, suggesting more reliable monitoring over complex land surfaces.
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