Claude Grandpey also drew attention to the study and general trend that confirmed by this ivestigation (trend that we are discussing here almost since the beginning of this thread and many times at a lot pages)

[link to volcans.blogs-de-voyage.fr]
Climate and volcanoes
Researchers have found that periods of high volcanic activity followed fast, global temperature increases and associated rapid ice melting. The reason is easy to understand: “In times of global warming, the glaciers are melting on the continents relatively quickly. At the same time the sea level rises. The weight on the continents decreases, while the weight on the oceanic tectonic plates increases. Thus, the stress changes within in the Earth to open more routes for ascending magma”.
[link to www.sciencedaily.com]