“We found that following deglaciation, the volcano starts to erupt way more, and also changes composition,” said Moreno-Yaeger. The composition changed as the magma melted crustal rocks while eruptions were suppressed. This made the molten rock more viscous and more explosive on eruption.

'Our study suggests this phenomenon isn’t limited to Iceland, where increased volcanicity has been observed, but could also occur in Antarctica,' he said. 'Other continental regions, like parts of North America, New Zealand and Russia, also now warrant closer scientific attention.'

Previous research has shown volcanic activity increased globally by two to six times after the last ice age"

Note: all that melting does not make permafrost healthy arable land. Canada and Russia will have less arable land in a hothouse earth not more. The whole world loses arabe land we even measure a football pitch becomes desert every day. Lots of material is trapped in the ice- like enough carbon to match what mankind has thrown up since 1700, metals that leach and turn rivers red, and bonus virii or bacteria that are ancient and have not had a host in millenia.

I feel conflicted - a large volcano - maybe the last big one was 1992 set us back .5C for a year or so. Hunga (the volcano that went to the stratosphere sending water vapor up tall) did not have such cooling. Maybe we will get a proper once in a millennia volcano eruption but that could knock out photosynthesis and I am spitballing but would that decrease global crop yields a statistically significant amount?