δ¹³C of terrestrial vegetation records Toarcian CO₂ and climate gradients.

ABSTRACT: Throughout Earth's history, variations in atmospheric CO₂ concentration modulated climate. Understanding changes in atmospheric carbon cycle is therefore pivotal in predicting consequences of recent global warming. Here, we report stable carbon isotopes (δ¹³C) of molecular land plant fossils complemented by bulk organic and inorganic carbon fractions for early Toarcian (Early Jurassic) sediments that coincided with global warming and a carbon cycle perturbation. The carbon cycle perturbation is expressed by a negative excursion in the δ¹³C records established for the different substrates. Based on differences in the magnitude of the carbon isotope excursion recorded in land plants and marine substrates we infer that the early Toarcian warming was paralleled

SUBMITTER: Ruebsam W 

PROVIDER: S-EPMC6954244 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature