Influence of Atmospheric Nuclear Explosions on Climate Change

This article suggests that the 0.5K stagnation in the global-mean surface temperature (GST) between 1945 and 1976 would be due to the atmospheric nuclear explosions, namely, Gadget, Little Boy, Fat Man and the succeeding at least 422 times nuclear weapons testing between 1946 and 1980. Estimation on GST drop due to the atmospheric nuclear explosions based on the published numerical simulation results was at least between 0.07K and 0.8K. The 0.5K GST stagnation was in the range of the estimation. Three supporting evidences, namely the radioactivity deposition volume in Tokyo, Japan, radioactivity concentration in livestock bones in Hokkaido, Japan and the diameter of the radionuclides from the Chernobyl accident were also shown. The accuracy of the simulation on GST in IPCC's AR4 would be significantly improved by including the influences of the particulate matters by the atmospheric nuclear explosions in their global climate model. A method to lower GST by injecting fine limestone powder to the upper troposphere and the stratosphere was proposed. A possibility of global warming deceleration was pointed out based on the observation and the estimated influence of the atmospheric nuclear explosions. Another possibility that we are suffering a "petit nuclear summer" was also pointed out.