Which mechanism contributes to eruptive style changes by volatile exsolution during magma ascent?

💡 Explanation

When magma ascends, decreasing pressure beyond solubility leads to decompression-induced bubble nucleation because dissolved volatiles form bubbles. This process increases the magma volume and explosivity. Decompression causes bubble nucleation, which gives rise to increased magma explosivity, rather than radiative transfer, crystal fractionation, or permeability changes that require alternate processes.

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