We modelled the evolution of the ice sheet from 24 ka to the present-day, using an ensemble (n=100) of Parallel-Ice-Sheet-Model (PISM) simulations at unprecedented resolution (5 km) evaluated through scoring against our ice-sheet-wide database of geological constraints on ice extent (PaleoGrIS).

New paper alert ! 🙂
Happy to share our new study published in The Cryosphere !
doi.org/10.5194/tc-1...
We modelled the evolution of the Greenland Ice Sheet from the LGM (24 ka) to the present and learned a lot on its former history and dynamics !
@jeremyely.bsky.social @chrisdclark.bsky.social

Hmmm this statement feels well disconnected from the last two decades of research on current and future Greenland-Ice-Sheet mass losses :

www.science.org/doi/10.1126/...

essd.copernicus.org/articles/15/...

A little preview of the 3D topo of the Swiss alps with our LGM-to-future glacier simulation movie projected onto : and which will soon depart for the Universal exhibition in Osaka (Swiss pavillon)! Currently in the Geopolis of University of Lausanne for those who want to check it out !

Nice views from the train of Cumulonimbus clouds over the alps : as I make my way to @egu.eu 2025 ! Looking forward to catching up with folks there this week :)

Yes indeed ! This outlet glacier can reach its LGM margins faster than most other AIF outlet glaciers, for a given climate forcing. We also show this in more detail with this figure, present in the Supplementary informations document:

This experiment both increases model-data agreement in ice extent and reduces the offset in ice thickness by between 200% and 450% relative to previous studies, thus providing numerous new insights into glacial landscape evolution in the Alps during the LGM.

This new approach enables us to run a perturbed-parameter ensemble of 100 simulations at 300 m resolution over the entire European alps, and over a 17,000 year-long time period, during the Last Glacial Maximum (35-18 kyr BP). Running each of these simulations takes us 2.5 days on a single GPU.