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Abstract. Satellite-derived aerosol products provide long-term and large-scaleobservations for analysing aerosol distributions and variations,climate-scale aerosol simulations, and aerosol–climate interactions.Therefore, a better understanding of the consistencies and differences amongmultiple aerosol products is important. The objective of this study is tocompare 11 global monthly aerosol optical depth (AOD) products,which are the European Space Agency Climate Change Initiative (ESA-CCI)Advanced Along-Track Scanning Radiometer (AATSR), Advanced Very HighResolution Radiometer (AVHRR), Multi-angle Imaging SpectroRadiometer(MISR), Moderate Resolution Imaging Spectroradiometer (MODIS), Sea-viewingWide Field-of-view Sensor (SeaWiFS), Visible Infrared Imaging Radiometer(VIIRS), and POLarization and Directionality of the Earth's Reflectance(POLDER) products. AErosol RObotic NEtwork (AERONET) Version 3 Level 2.0monthly measurements at 308 sites around the world are selected forcomparison. Our results illustrate that the spatial distributions andtemporal variations of most aerosol products are highly consistent globallybut exhibit certain differences on regional and site scales. In general, theAATSR Dual View (ADV) and SeaWiFS products show the lowest spatial coveragewith numerous missing values, while the MODIS products can cover most areas(average of 87 %) of the world. The best performance is observed inSeptember–October–November (SON) and the worst is in June–July–August (JJA).All the products perform unsatisfactorily over northern Africa and MiddleEast, southern and eastern Asia, and their coastal areas due to the influence fromsurface brightness and human activities. In general, the MODIS products showthe best agreement with the AERONET-based AOD values on different spatialscales among all the products. Furthermore, all aerosol products can capturethe correct aerosol trends at most cases, especially in areas where aerosolschange significantly. The MODIS products perform best in capturing theglobal temporal variations in aerosols. These results provide a referencefor users to select appropriate aerosol products for their particularstudies.

Intercomparison in spatial distributions and temporal trends derived from multi-source satellite aerosol products