Strengthened silicate weathering is an expected consequence of large igneous province (LIP) emplacement, such as the Siberian Traps volcanism around 252 Ma, which coincided with the end-Permian mass extinction. Although physical weathering appears to have intensified due to global warming and a more vigorous hydrological cycle, proxy-based reconstructions of chemical weathering across the Permian–Triassic transition yield conflicting results. This raises the question of whether CO₂- and temperature-driven enhancement of chemical weathering was outpaced by the massive CO₂ emissions from the Siberian Traps, and potentially exacerbated by enhanced reverse weathering. However, quantitative assessments of changes in chemical weathering rates, CO₂ degassing, and reverse weathering remain limited, hindering a comprehensive understanding of the dynamic drivers behind the extinction event and its recovery. Here, I use an Earth system model of intermediate complexity (cGENIE) in combination with a data-driven approach to explore plausible ranges for chemical weathering, CO₂ degassing, and reverse weathering. This enables new insights into the dynamic interactions between LIPs and associated biotic and environmental responses.

reverse weathering,siberian traps volcamism