Deglaciation-enhanced mantle CO₂ fluxes at Yellowstone imply positive climate feedback.

ABSTRACT: Mantle melt generation in response to glacial unloading has been linked to enhanced magmatic volatile release in Iceland and global eruptive records. It is unclear whether this process is important in systems lacking evidence of enhanced eruptions. The deglaciation of the Yellowstone ice cap did not observably enhance volcanism, yet Yellowstone emits large volumes of CO₂ due to melt crystallization at depth. Here we model mantle melting and CO₂ release during the deglaciation of Yellowstone (using Iceland as a benchmark). We find mantle melting is enhanced 19-fold during deglaciation, generating an additional 250-620 km³. These melts segregate an additional 18-79 Gt of CO₂ from the mantle, representing a ~3-15% increase in the global volcanic CO<

SUBMITTER: Clerc F 

PROVIDER: S-EPMC10879189 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature