Environmental Geology Lecture - Volcanism and climate change

The basic question here is - what effects can large volcanic eruptions have on global climate? We have clear historic evidence that large explosive eruptions can cause measurable cooling for a duration of several years. The 1991 Pinatubo eruption was a good example. We can also ask -what might be longer term effects? In addition, these questions provide an initial introduction to the myriad of ways that global climate might change.

Character of volcanic gases:

Nature of atmospheric gases and the contribution of volcanic gases:

A model for global climate change:

Some of the myriad of ways to change global climate:

Lower Cretaceous super greenhouse time:


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