Climate Drift: Geoengineers have a problem. Computer modeling suggests that blocking solar radiation in the temperate zone (to preserve Arctic ice or to forestall massive methane releases) could cool the Northern hemisphere but its impact could also drift South, creating severe climatic disruptions by dampening down Asia’s monsoon while drying out Africa’s Sahel. Not a popular proposition.
Now, geoengineers may hope they have a solution. A new study in Nature Climate Change[i] by the UK Government’s Meteorological Office suggests that some form of solar radiation management could mitigate the conventional vicissitudes of nature. According to the report, volcanic eruptions north of the equator in the 20th century either contributed to – or caused – droughts along the African equator and further South.