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How Bølling warming and ice saddles fed MWP1a
North American ice-sheet ensembles show saddle collapse and Bølling warming can supply several meters of Meltwater Pulse 1a in 340 years.
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What is Meltwater Pulse 1a in the coral records cited?
14–18 m of GMSL in less than 340 years at 14.6 ka.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
What ice-sheet model ran the deglaciation ensembles?
Glimmer-CISM version 1.14.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
How many experiments were run in total?
603 (201 per Fabs, Cabs, and Cano forcing).
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
What GMSL did prior G12 saddle collapse produce?
7 m in 350 years (10 m in 500 years).
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
What Fabs saddle-collapse pulse is found here?
5.7–11.0 m GMSL in 340 years, but timed 12.3–10.9 ka.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
What Bølling-window GMSL does Cano versus Cabs produce?
3.2–6.1 m (Cano) versus 2.7–3.2 m (Cabs).
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
When does Bølling melt amplify to 5–6 m?
When the warming triggers Cordilleran–Laurentide separation.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
What melt remains if the ice sheets are already split at Bølling?
About 3–4 m GMSL in 340 years.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
Why can’t FAMOUS assess Bølling melt?
F-21k has no Bølling warming signal.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
What geological window is cited for ice-sheet separation?
Between 16 and 14 ka, overlapping MWP1a at ~14.6 ka.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified
Which missing processes could enlarge the North American contribution?
Marine ice-sheet instability, proglacial lakes, and higher-order ice-stream dynamics.
Source: Abrupt Bølling warming and ice saddle collapse contributions to the Meltwater Pulse 1a rapid sea level rise · DOI · quote verified