Read here. As the global warming alarmists have become ever more desperate, due to their failed arguments, every single catastrophe that is associated with a tectonic plate event they now blame on global warming. Besides earthquakes and resultant tsunamis, now its volcanoes that are being caused by excess CO2, supposedly.
So, does global warming really cause volcanic eruptions? Here's what a recent peer-reviewed study found:
"The sensitivity of volcanoes to small changes in ice thickness or to recession of small glaciers on their flanks is unknown.....Broader feedbacks between volcanism and climate change remain poorly understood.....Uncertainty about the time scale of volcanic responses to ice unloading.....Lack of data on how past changes in ice thickness have affected the style of volcanic eruptions and associated hazards.....Poor constraint on how ice bodies on volcanoes will respond to twenty-first century climate change" [Hugh Tuffen 2010: Philosophical Transaction of the Royal Society]
This study by a top volcanologist indicates that science really has no idea if warming causes eruptions. But clearly, this scientist lays out the facts why he needs a lot more research funds/grants so as to find answers to the known unknowns of "AGW volcanic" activity.