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

Author

Listed:
  • Yucheng Lin

    (Durham University
    Australian National University)

  • Fiona D. Hibbert

    (Australian National University
    University of York)

  • Pippa L. Whitehouse

    (Durham University)

  • Sarah A. Woodroffe

    (Durham University)

  • Anthony Purcell

    (Australian National University)

  • Ian Shennan

    (Durham University)

  • Sarah L. Bradley

    (The University of Sheffield)

Abstract

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.

Suggested Citation

  • Yucheng Lin & Fiona D. Hibbert & Pippa L. Whitehouse & Sarah A. Woodroffe & Anthony Purcell & Ian Shennan & Sarah L. Bradley, 2021. "A reconciled solution of Meltwater Pulse 1A sources using sea-level fingerprinting," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21990-y
    DOI: 10.1038/s41467-021-21990-y
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