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A reconciled solution of Meltwater Pulse 1A sources using sea-level fingerprinting

Lin, Y.; Hibbert, F.; Whitehouse, P.; Woodroffe, S.; Purcell, A.; Shennan, I.; Bradley, S.

A reconciled solution of Meltwater Pulse 1A sources using sea-level fingerprinting Thumbnail


F. Hibbert

A. Purcell

I. Shennan

S. Bradley


The most rapid global sea-level rise event of the last deglaciation, Meltwater Pulse 1A (MWP-1A), occurred ∼14,650 years ago. Considerable uncertainty regarding the sources of meltwater limits understanding of the relationship between MWP-1A and the concurrent fast-changing climate. Here we present a data-driven inversion approach, using a glacio-isostatic adjustment model to invert for the sources of MWP-1A via sea-level constraints from six geographically distributed sites. The results suggest contributions from Antarctica, 1.3 m (0–5.9 m; 95% probability), Scandinavia, 4.6 m (3.2–6.4 m) and North America, 12.0 m (5.6–15.4 m), giving a global mean sea-level rise of 17.9 m (15.7–20.2 m) in 500 years. Only a North American dominant scenario successfully predicts the observed sea-level change across our six sites and an Antarctic dominant scenario is firmly refuted by Scottish isolation basin records. Our sea-level based results therefore reconcile with field-based ice-sheet reconstructions.


Lin, Y., Hibbert, F., Whitehouse, P., Woodroffe, S., Purcell, A., Shennan, I., & Bradley, S. (2021). A reconciled solution of Meltwater Pulse 1A sources using sea-level fingerprinting. Nature Communications, 12, Article 2015.

Journal Article Type Article
Acceptance Date Jan 22, 2021
Online Publication Date Apr 1, 2021
Publication Date 2021
Deposit Date Mar 15, 2021
Publicly Available Date Apr 8, 2021
Journal Nature Communications
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 12
Article Number 2015


Published Journal Article (5.7 Mb)

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