The repository contains daily time series of the historical evolution of broadband aerosol optical depth (BAOD) from sunshine duration measurements at around thousand sites across the world since the late 19th century.

The data supports the findings and results of the manuscript "Long-term trends in reconstructed atmospheric aerosol load based on large-scale sunshine duration records since 1900" by Wandji Nyamsi et al., submitted to the Atmospheric Chemistry and Physics journal.