Enhanced subglacial discharge from Antarctica during meltwater pulse 1A.

ABSTRACT: Subglacial discharge from the Antarctic Ice Sheet (AIS) likely played a crucial role in the loss of the ice sheet and the subsequent rise in sea level during the last deglaciation. However, no direct proxy is currently available to document subglacial discharge from the AIS, which leaves significant gaps in our understanding of the complex interactions between subglacial discharge and ice-sheet stability. Here we present deep-sea coral ²³⁴U/²³⁸U records from the Drake Passage in the Southern Ocean to track subglacial discharge from the AIS. Our findings reveal distinctively higher seawater ²³⁴U/²³⁸U values from 15,400 to 14,000 years ago, corresponding to the period of the highest iceberg-rafted debris flux and the occurrence of the meltwater pul

SUBMITTER: Li T 

PROVIDER: S-EPMC10643554 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature