>Summer temperatures in the northern hemisphere fell by an average of 0.4 °C (0.72 °F) in the year following the eruption.

Hmm... This could be useful for fighting climate change! What if we artificially triggered an eruption in the Yellowstone caldera? Maybe a few hydrogen bombs at the right locations could weaken the crust enough to trigger a huge eruption, which would lower global temperatures for a few years.