Study author Jorge Sanchez-Sesma examined solar cycle data going back 100,000 years and compared them to about 25,000 years of surface air temperature data in the Congo River Basin. Sanchez-Sesma found that “information from reconstructions and models indicates a potential continental tropical temperature cooling of around 0.5oC for the rest of the 21st century”.

Furthermore, the study argues that varying levels of solar activity explain “most of the variation” in the Congo River Basin’s air temperatures “during the past centuries” — this is important since the river basin is far from the influence of ocean temperatures.