The Greenland spatial fingerprint of Dansgaard-Oeschger events in observations and models.

ABSTRACT: Pleistocene Ice Ages display abrupt Dansgaard-Oeschger (DO) climate oscillations that provide prime examples of Earth System tipping points-abrupt transition that may result in irreversible change. Greenland ice cores provide key records of DO climate variability, but gas-calibrated estimates of the temperature change magnitudes have been limited to central and northwest Greenland. Here, we present ice-core δ¹⁵N-N₂ records from south (Dye 3) and coastal east Greenland (Renland) to calibrate the local water isotope thermometer and provide a Greenland-wide spatial characterization of DO event magnitude. We combine these data with existing records of δ¹⁸O, deuterium excess, and accumulation rates to create a multiproxy "fingerprint" of the DO impact on Greenla

SUBMITTER: Buizert C 

PROVIDER: S-EPMC11536073 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature