Considering Global Dimming and Brightening in Solar Resource Assessments

by Jincy Varughese

The planning process for a solar power system requires a solar resource assessment which involves predicting the annual long-term average solar radiation for the lifetime of the solar system. These values are determined by using long-term data previously collected at other solar power systems. However, the period from the 1950s to 1980s saw a decrease in solar radiation, called global dimming, and since the mid 1980s, the opposite change-global brightening, has occurred. In “Rethinking Solar Resource Assessments in the Context of Global Dimming and Brightening”, Müller and his team from Germany analyze the effect of these solar radiation trends on solar resource assessments and explore the effectiveness of other solar radiation prediction methods. Continue reading