In the original publication of the paper, we reported that 22.5 Mt of volcanic aerosols was prescribed at 37 hPa. An unintended additional aerosol mass of 3.26 Mt was also prescribed at 23 hPa and hence the total amount is 25.76 Mt. However, the results and conclusions in the paper are not at all affected by this unintended additional amount of aerosols at 23 hPa.