Direct SW aerosol radiative forcing over Portugal

The aerosol research team belong to the Geophysics Centre of Évora (Portugal) has published an interesting article in ACP. This paper analyses the evaluation of the aerosol radiative forcing at the top of the atmosphere as well as at the surface over two ground-based stations located at the south of Portugal. The instantaneous direct SW aerosol radiative forcing values obtained at the top of the atmosphere are, in the majority of the cases, negative, indicating a tendency for cooling the Earth at the top of the atmosphere. The average surface direct SW aerosol radiative forcing efficiency is also negative with the more negative values corresponding to forest fire aerosols.