Estimating Greenland's present and future ice thickness using inverse modeling and high-resolution satellite data

Beskrivning

The three main aims in this project are to

1) construct a new emulator of the higher-order physics version of the Parallel Ice Sheet Model (PISM),
2) generate a present-day thickness and bed map of the Greenland Ice Sheet, and
3) simulate the future mass loss and contribution of the Greenland Ice Sheet to sea level rise up to 2300.
A novel, fast and versatile inverse approach, developed with support in a previous SNSA-funded project (dnr 189/18; 2018-2023), will be used. After recent applications on mountain glaciers across the Arctic and sub-Arctic, is now optimized for use on the larger Greenland Ice Sheet, while making optimal use of the newest high-resolution satellite data products.
This ultimately allows for modelling the present and future of the ice sheet with unprecedented spatial detail and reduced model uncertainty, thereby contributing to reduced uncertainty in sea level rise predictions for a range of future emission scenarios. The high speed of the emulator enables us to perform experiments with numerous different parameter settings, which enables better calibration of the inverse method, as well as uncertainty quantification of present-day and future thickness maps.