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Tropical Forest Collapse Prolonged Super-Greenhouse After Permian–Triassic Extinction

New fossil-based analyses demonstrating that ancient tropical forest die-off prevented carbon uptake sustained global temperatures at super-greenhouse levels for five million years.

Image
Another post-extinction lycopod.
A complicated broad leaf seed fern from a pre-extinction South China rainforest.
Post-extinction lycopod sporophyll.

Overview

  • The University of Leeds and China University of Geosciences team published their findings in Nature Communications, identifying vegetation loss as the missing link in prolonged post-extinction warming.
  • Researchers combined China’s extensive fossil archives with geochemical proxies and climate models to map declines in plant productivity around the Permian–Triassic boundary.
  • The study confirms that the collapse of tropical forest biomass critically reduced global carbon sequestration and kept atmospheric CO2 elevated.
  • Climate simulations reveal that once forests failed to recover, super-greenhouse conditions endured for about five million years even after Siberian Traps eruptions ended.
  • Authors warn that a comparable die-off of modern rainforests could lock today’s climate into sustained warming despite halting CO₂ emissions.