Marine siliceous ecosystem decline led to sustained anomalous Early Triassic warmth.

ABSTRACT: In the wake of rapid CO₂ release tied to the emplacement of the Siberian Traps, elevated temperatures were maintained for over five million years during the end-Permian biotic crisis. This protracted recovery defies our current understanding of climate regulation via the silicate weathering feedback, and hints at a fundamentally altered carbon and silica cycle. Here, we propose that the development of widespread marine anoxia and Si-rich conditions, linked to the collapse of the biological silica factory, warming, and increased weathering, was capable of trapping Earth's system within a hyperthermal by enhancing ocean-atmosphere CO₂ recycling via authigenic clay formation. While solid-Earth degassing may have acted as a trigger, subsequent biotic feedbacks likely exac

SUBMITTER: Isson TT 

PROVIDER: S-EPMC9206662 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature