EGU25-21697, updated on 15 Mar 2025
https://doi.org/10.5194/egusphere-egu25-21697
EGU General Assembly 2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Firn densification across the Greenland Ice Sheet from the IMAU-FDM (1940-2023)
Elizabeth Case1, Peter Kuipers-Munneke1, Max Brils2, Willem-Jan van de Berg1, Carleen Tijm-Reijmer1, and Michiel van den Broeke1
Elizabeth Case et al.
  • 1Institute for Marine and Atmospheric Research, Utrecht University, Netehrlands
  • 2Northumbria University, United Kingdom

The IMAU Firn Densification Model (IMAU-FDM) is a 1D, semi-empirical model that simulates the evolution of snow grain size, firn density, firn air content, temperature, and liquid water content. It has been used primarily to investigate future surface changes over both Greenland and Antarctica, as well as for continent-wide estimates of mass change from satellite altimetry. Here, we will present a streamlined, updated IMAU-FDM with results for the Greenland Ice Sheet extended back to 1940 and through to 2023. IMAU-FDM is driven by ERA5, dynamically downscaled by the regional climate model RACMO 2.3p2 to 5.5 km^2 resolution. We will present timeseries of firn air content, liquid water content, and ice slab presence across the Greenland Ice Sheet, and initial results of future runs through 2100.

How to cite: Case, E., Kuipers-Munneke, P., Brils, M., van de Berg, W.-J., Tijm-Reijmer, C., and van den Broeke, M.: Firn densification across the Greenland Ice Sheet from the IMAU-FDM (1940-2023), EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-21697, https://doi.org/10.5194/egusphere-egu25-21697, 2025.