The linked reference (& associated article and images) show that while the paleo marine portions of the Fennoscandian Ice Sheet and the Antarctic Ice Sheets made abrupt contributions to SLR during Melt Water Pulse 1a (MWP 1a) that the Younger Dryas event (circa 13kya to 11.5kya) may have been triggered by a MISI-type of collapse of part of the paleo Cordilleran Ice Sheet. To me this added support to the idea that an abrupt collapse of major portions of the WAIS, and/or an abrupt freshwater hosing event from the Beaufort Gyre, could trigger rapid climate change this century:
T. Pico et al. Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event, Science Advances (2020). DOI: 10.1126/sciadv.aay2935
https://advances.sciencemag.org/content/6/9/eaay2935Abstract
During the Last Glacial Maximum, expansive continental ice sheets lowered globally averaged sea level ~130 m, exposing a land bridge at the Bering Strait. During the subsequent deglaciation, sea level rose rapidly and ultimately flooded the Bering Strait, linking the Arctic and Pacific Oceans. Observational records of the Bering Strait flooding have suggested two apparently contradictory scenarios for the timing of the reconnection. We reconcile these enigmatic datasets using gravitationally self-consistent sea-level simulations that vary the timing and geometry of ice retreat between the Laurentide and Cordilleran Ice Sheets to the southwest of the Bering Strait to fit observations of a two-phased flooding history. Assuming the datasets are robust, we demonstrate that their reconciliation requires a substantial melting of the Cordilleran and western Laurentide Ice Sheet from 13,000 to 11,500 years ago. This timing provides a freshwater source for the widely debated Younger Dryas cold episode (12,900 to 11,700 years ago).
Extract: "We refine the timing and geometry of relative sea level change in the Bering Strait during the last deglaciation by constructing an ice history within the CIS and western LIS that is consistent with available land dates. Our ice sheet reconstructions, which maintain fits to sea level records in the far-field (section S9), yield sea level predictions that reconcile disparate and previously enigmatic datasets recording the inundation history of the Bering Shelf. Our inferred ice-melting scenarios source substantial meltwater from the retreat between the CIS and LIS from 13 to 11.5 ka ago in the region west of 110°W, potentially initiated by marine retreat of the ice sheet (fig. S16). Part of the freshwater flux from this ice-mass loss (0.11 Sv over the period 13 to 11.5 ka ago) would have freshened the subpolar North Atlantic and may have been sufficient to suppress deepwater convection and thereby initiate Younger Dryas cooling (30–32). The end of the meltwater flux may have also had a role in terminating the anomalous Younger Dryas cooling and triggering the onset of early Holocene warmth."
Caption for the first image: "Fig. 3 Eustatic contributions of each ice sheet.
Cordilleran and western Laurentide Ice Sheet (CIS) in black, Laurentide Ice Sheet (east of 110°W; LIS) in gray, Fennoscandian Ice Sheet (FIS) in blue, and Antarctic Ice Sheet (AIS) in red, for both ICE-6G (solid) and an alternate ice model, GI-31 (dashed). The shaded gray rectangle highlights the interval of 13 to 11.5 ka. The Younger Dryas (YD; 12.9 to 11.7 ka) and Meltwater Pulse-1a (MWP-1a; 14.5 to 14 ka ago) are labeled. The inset compares total global eustatic histories for ICE-6G (gray) and GI-31 (pink), which differ by less than 2 m from 13 to 11.5 ka ago."
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Supplementary Materials for Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event T. Pico, J. X. Mitrovica, A. C. Mix
https://advances.sciencemag.org/content/suppl/2020/02/24/6.9.eaay2935.DC1https://advances.sciencemag.org/content/advances/suppl/2020/02/24/6.9.eaay2935.DC1/aay2935_SM.pdfCaption for the second image: "Fig. S17. Possible marine retreat of ice sheet. Modeled paleoelevation at 13 ka using GI-31 ice history. Contours show the margin and thickness of ice at 13 ka. Shaded regions show ice margin at 11.5 ka. Region with reverse bedrock slope (1m/km) is highlighted by black arrow. This region of ice may have been subject to a marine ice sheet instability, where water at the base of the ice sheet induces melting, causing a rapidly retreating grounding line to induce a large mass loss in this region"
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Title: "Ancient flooding of Bering Strait shows us how ice sheets respond to climate change"
https://phys.org/news/2020-02-ancient-bering-strait-ice-sheets.htmlExtract: "Despite the sea-level data from the Bering Strait, that hypothesis hasn't been universally accepted, Pico said, in part because the study places the melting of the "saddle"—the region where the two North American ice sheets meet—at a time significantly later than many believe it was.
"Most people assume that happened earlier because, even though sea level was rising quickly around the world, there was a period—called meltwater pulse 1A—when it rose especially fast," she said. "In that period, sea level rose by 15 to 20 meters in under 300 years. That would require a huge amount of ice melt, and many people have assumed the saddle melted during this time.
"But that assumed history doesn't fit the Bering Strait sea-level record," she continued. "When we use that flooding history as a sea-level record, it's not consistent with what everyone had assumed before.""