Past rapid warmings as a constraint on greenhouse-gas climate feedbacks.

ABSTRACT: There are large uncertainties in the estimation of greenhouse-gas climate feedback. Recent observations do not provide strong constraints because they are short and complicated by human interventions, while model-based estimates differ considerably. Rapid climate changes during the last glacial period (Dansgaard-Oeschger events), observed near-globally, were comparable in both rate and magnitude to current and projected 21st century climate warming and therefore provide a relevant constraint on feedback strength. Here we use these events to quantify the centennial-scale feedback strength of CO₂, CH₄ and N₂O by relating global mean temperature changes, simulated by an appropriately forced low-resolution climate model, to the radiative forcing of these greenh

SUBMITTER: Liu M 

PROVIDER: S-EPMC11757147 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature