Abstract
The moderate resolution imaging spectroradiometer (MODIS) is one of the widely used sensors to address environmental and climate change subjects with a daily global coverage. MODIS Collection 6 aerosol products at 10-km resolution are used in this study to monitor aerosol variability and assess its uncertainty using ground-based measurements. The aerosol optical depth (AOD) is retrieved by different algorithms based on the pixel surface, determining between land and ocean. Using data collected from Sidi Salem Aerosol Robotic Network (AERONET) station, we computed the accuracy for aerosol optical depth (AOD) retrieved from MODIS aboard the AQUA satellite using two validation methods. The results show a good agreement between MODIS and AERONET data for the study period using both the algorithms. We obtained high values of the correlation coefficient. These findings indicate that MODIS data perform well over Ben Salem AERONET station and are recommended for air quality monitoring over Tunisia. The conducted validation throughout the AERONET leads to a degree of confidence that allows a deep investigation of the AOD spatial variability over Tunisia. Then, MODIS data shows high performance with good certainty to identify the principal dust sources and typical transport paths occurring on the study region.
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Acknowledgments
We would like to express our special appreciation and thanks to the Deutsche Akademische Austausch dienst (DAAD) for their support. Many thanks are expressed to NASA Goddard Space Flight Center (GSFC) and Atmosphere Archive and Distribution System (LAADS) (http://ladsweb.nascom.nasa.gov) for making available the L2 MODIS AQUA C6 aerosol data. The authors are grateful to the AERONET scientific team for making data level 2 available.
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Bouaziz, M., Guermazi, H., Khcharem, K. et al. Aerosol uncertainty assessment: an integrated approach of remote AQUA MODIS and AERONET data. Arab J Geosci 12, 50 (2019). https://doi.org/10.1007/s12517-018-4214-y
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DOI: https://doi.org/10.1007/s12517-018-4214-y