期刊
NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41467-021-21990-y
关键词
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资金
- China Scholarship Council-Durham University
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [838841-ExTaSea]
- Natural Environment Research Council consortium grant BRITICE-CHRONO [NE/J009768/1]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [787263]
- NERC [GST/02/0760, GST/02/0761]
- Swiss Academy of Sciences
- Chinese Academy of Sciences
The study suggests that the North American and Eurasian Ice Sheets were the primary contributors to the rapid global sea-level rise event, Meltwater Pulse 1A, during the last deglaciation. The results based on sea-level constraints align with field-based ice-sheet reconstructions, supporting the idea that the freshwater causing the sea-level rise mainly came from North America and Eurasia.
The most rapid global sea-level rise event of the last deglaciation, Meltwater Pulse 1A (MWP-1A), occurred similar to 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. Meltwater Pulse 1A was the most rapid global sea-level rise event during the last deglaciation, but the source of the freshwater causing this rise is debated. Here, the authors use a data-driven inversion approach to show that the North American and Eurasian Ice Sheets were the dominant contributors.
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