"Improved AOD@440nm: Satellite data collection and validation" - Validation report on spatio-temporal ground-based vs satellite comparisons ...

• Main Authors: Valeri, Massimo, Casadio, Stefano, Manunza, Lorenzo
• Format: Text
• Language: unknown
• Published: Zenodo 2023
• Subjects: Aerosol Robotic Network
• Online Access: https://dx.doi.org/10.5281/zenodo.10204060; https://zenodo.org/doi/10.5281/zenodo.10204060

The aerosol optical depth (AOD) is probably the most comprehensive and used variable for assessing the aerosol load in the atmosphere. During the last decades, satellite and ground-based remote sensing observations have become widely used to monitor aerosols' spatial and temporal distributions on a global and local scale. Satellite instruments, such as Moderate Resolution Imaging Spectroradiometer (MODIS), monitor aerosols on a regional and global scale and provide long-term and continuous coverage. Observations from ground-based stations have higher measurement precision at low spatial reach. Such ground-based optical networks for aerosols monitoring, like AErosol RObotic NETwork (AERONET), use sun photometers or sun-sky radiometers. Unfortunately, the AOD retrieval from sun-photometric measurements is sensitive to the concentration of atmospheric gases such as nitrogen dioxide (NO2), particularly in spectral regions in which light absorption is significant. Currently, either satellite climatological NO2 ...