Sea-level feedback lowers projections of future Antarctic Ice-Sheet mass loss.

ABSTRACT: The stability of marine sectors of the Antarctic Ice Sheet (AIS) in a warming climate has been identified as the largest source of uncertainty in projections of future sea-level rise. Sea-level fall near the grounding line of a retreating marine ice sheet has a stabilizing influence on the ice sheets, and previous studies have established the importance of this feedback on ice age AIS evolution. Here we use a coupled ice sheet-sea-level model to investigate the impact of the feedback mechanism on future AIS retreat over centennial and millennial timescales for a range of emission scenarios. We show that the combination of bedrock uplift and sea-surface drop associated with ice-sheet retreat significantly reduces AIS mass loss relative to a simulation without these effects included. Sensiti

SUBMITTER: Gomez N 

PROVIDER: S-EPMC5426515 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature