Weber, Michael E (2021): IBRD data Iceberg Alley [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.937485
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Abstract:
Emerging ice-sheet modeling suggests once initiated, retreat of the Antarctic Ice Sheet (AIS) can continue for centuries. Unfortunately, the short observational record cannot resolve the tipping points, rate of change, and timescale of responses. Iceberg-rafted debris data from Iceberg Alley identify eight retreat phases after the Last Glacial Maximum that each destabilized the AIS within a decade, contributing to global sea-level rise for centuries to a millennium, which subsequently re-stabilized equally rapidly. This dynamic response of the AIS is supported by (i) a West Antarctic blue ice record of ice-elevation drawdown >600 m during three such retreat events related to globally recognized deglacial meltwater pulses, (ii) step-wise retreat up to 400 km across the Ross Sea shelf, (iii) independent ice sheet modeling, and (iv) tipping point analysis. Our findings are consistent with a growing body of evidence suggesting the recent acceleration of AIS mass loss may mark the beginning of a prolonged period of ice sheet retreat and substantial global sea level rise.
Supplement to:
Weber, Michael E; Golledge, Nicholas R; Fogwill, Chris J; Turney, Chris S M; Thomas, Zoë Amber (2021): Decadal-scale onset and termination of Antarctic ice-mass loss during the last deglaciation. Nature Communications, 12(1), https://doi.org/10.1038/s41467-021-27053-6
Related to:
Gomez, Natalya; Weber, Michael E; Clark, Peter U; Mitrovica, Jerry X; Han, Holly K (2020): Age uncertainty based on Iceberg-Rafted Debris (IBRD), Stack MD07-3133 und MD07-3134. PANGAEA, https://doi.org/10.1594/PANGAEA.922079
Coverage:
Latitude: -58.427000 * Longitude: -42.465000
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets
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Datasets listed in this bundled publication
- Weber, ME (2021): IBRD data of stacked record from cores MD07-3133 and MD07-3134. https://doi.org/10.1594/PANGAEA.937484
- Weber, ME (2021): Data model comparison of deglacial ice-sheet and sea-level events, and modeled relation between iceberg calving, sub-shelf melt, and change in grounded ice mass. https://doi.org/10.1594/PANGAEA.938186