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Prior knowledge-supported aerosol optical depth retrieval over land surfaces at 500 m spatial resolution with MODIS data

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Wang Y, Xue Y, Li Y, Guang J, Mei L, Xu H, Ai J. Prior knowledge-supported aerosol optical depth retrieval over land surfaces at 500 m spatial resolution with MODIS data. International Journal of Remote Sensing, 2012, 33(3): 674-691, doi:10.1080/01431161.2011.577832.
Literature information
Type Of Reference JOUR
Title Prior knowledge-supported aerosol optical depth retrieval over land surfaces at 500 m spatial resolution with MODIS data
Authors Wang, Ying| Xue, Yong| Li, Yingjie| Guang, Jie| Mei, Linlu| Xu, Hui| Ai, Jianwen|
Secondary Title International Journal of Remote Sensing
Abstract Aerosol optical depth (AOD) values at a spatial resolution of 500 m were retrieved over terrain areas by applying a time series of Moderate resolution Imaging Spectroradiometer (MODIS) 500 m resolution data in the Heihe region (36–42° N, 97–104° E) of Gansu Province, China; in the Pearl River Delta (18–30° N, 108–122° E), China; and in Beijing (39–41° N, 115–118° E), China. A novel prior knowledge scheme was used in the algorithm that performs cloud screening, simultaneous AOD and surface reflectance retrieval from the MODIS 500 m Level 1B data. This prior knowledge scheme produced a new Ångström exponent α, utilizing a Terra pass time α and an Aqua pass time α to better satisfy the invariant α assumption. The retrieved AOD data were compared with AOD data observed with the ground-based, automatic Sun-tracking photometer CE318 at corresponding bands in the Heihe region and with Aerosol Robotic Network (AERONET) data in the Pearl River Delta and in Beijing. Validation experiments demonstrated the potential of applying the algorithm to MODIS 500 m AOD retrieval on land; validation showed the uncertainty of Δτ = ±0.1±0.2τ over various types of underlying land surface, including cities, where τ is the aerosol optical depth. The root mean square errors (RMSEs) were around 0.1 for inland regions and up to 0.24 for cities by the sea, such as Hong Kong and Zhongshan, China.
Date 2012///
Year 2012
DOI 10.1080/01431161.2011.577832
Database Provider Taylor and Francis+NEJM
volume 33
Issue Number 3
Start Page 674
Issn 0143-1161
Url http://www.tandfonline.com/doi/abs/10.1080/01431161.2011.577832
Access Date 2013/10/04/06:23:20
file_attachments2 http://www.tandfonline.com/doi/abs/10.1080/01431161.2011.577832#.Uk5e1Hjn5eQ
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