Eccentricity pacing and rapid termination of the early Antarctic ice ages.

ABSTRACT: Earth's obliquity and eccentricity cycles are strongly imprinted on Earth's climate and widely used to measure geological time. However, the record of these imprints on the oxygen isotope record in deep-sea benthic foraminifera (δ¹⁸O_b) shows contradictory signals that violate isotopic principles and cause controversy over climate-ice sheet interactions. Here, we present a δ¹⁸O_b record of high fidelity from International Ocean Drilling Program (IODP) Site U1406 in the northwest Atlantic Ocean. We compare our record to other records for the time interval between 28 and 20 million years ago, when Earth was warmer than today, and only Antarctic ice sheets existed. The imprint of eccentricity on δ¹⁸O_b is remarkably consistent glo

SUBMITTER: van Peer TE 

PROVIDER: S-EPMC11621355 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature