Sea-level rise due to polar ice-sheet mass loss during past warm periods

TitleSea-level rise due to polar ice-sheet mass loss during past warm periods
Publication TypeJournal Article
Year of Publication2015
AuthorsDutton A, Carlson AE, Long AJ, Milne GA, Clark PU, DeConto RM, Horton BP, Rahmstorf S, Raymo ME
JournalScience
Volume349
Start Pageaaa4019
Issue6244
Date Published07/2015
Abstract

Interdisciplinary studies of geologic archives have ushered in a new era of deciphering magnitudes, rates, and sources of sea-level rise from polar ice-sheet loss during past warm periods. Accounting for glacial isostatic processes helps to reconcile spatial variability in peak sea level during marine isotope stages 5e and 11, when the global mean reached 6 to 9 meters and 6 to 13 meters higher than present, respectively. Dynamic topography introduces large uncertainties on longer time scales, precluding robust sea-level estimates for intervals such as the Pliocene. Present climate is warming to a level associated with significant polar ice-sheet loss in the past. Here, we outline advances and challenges involved in constraining ice-sheet sensitivity to climate change with use of paleo–sea level records.

URLhttp://science.sciencemag.org/content/349/6244/aaa4019
DOI10.1126/science.aaa4019