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Ancient siderites reveal hot and humid super-greenhouse climate
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Abstract
Earth’s climate is warming as the rise in atmospheric CO2 (pCO2) contributes to increased radiative forcing. State-of-the-art models calculate a wide range in Earth’s climate sensitivities due to increasing pCO2, and, in particular, the mechanisms responsible for amplification of high latitude temperatures remain highly debated. The geological record provides a means to evaluate the consequences of high radiative forcing on Earth’s climate. Here we present clumped (Δ47) and oxygen (δ18O) isotope data from latest Paleocene/earliest Eocene (LPEE; 57-55 million years ago) pedogenic siderites, a time when pCO2 peaked between 1400 and 4000 ppm. Co... more
DOI
https://doi.org/10.31223/osf.io/5tk8g
Subjects
Earth Sciences, Geochemistry, Geology, Physical Sciences and Mathematics
Keywords
climate, clumped isotopes, eocene, hydrological cycle, oxygen isotopes in precipitation, paleocene, siderite
Dates
Published: 2020-06-10 18:33
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License
CC BY Attribution 4.0 International
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Data Availability (Reason not available):
Supplemental data will be made openly accessible once the manuscript is published
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