4.4-km global climate projections with IFS-FESOM

Sebastian Beyer; Thomas Rackow; Dmitry Sidorenko; Nikolay Koldunov; Amal John; Rohit Ghosh; Jan Streffing; Suvarchal Kumar Cheedela; Maqsood Mubarak Rajput; Miguel Andrés-Martínez; Mohammed Hussam Al Turjman; Razvan Aguridan; Matteo Nurisso; Jan Wehner; Thomas Jung

doi:https://doi.org/10.5194/egusphere-egu25-18012

[Back] [Session CL4.7]

EGU25-18012, updated on 15 Mar 2025

https://doi.org/10.5194/egusphere-egu25-18012

EGU General Assembly 2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Poster | Wednesday, 30 Apr, 10:45–12:30 (CEST), Display time Wednesday, 30 Apr, 08:30–12:30

Hall X5, X5.189

4.4-km global climate projections with IFS-FESOM

Sebastian Beyer¹, Thomas Rackow², Dmitry Sidorenko¹, Nikolay Koldunov¹, Amal John¹, Rohit Ghosh¹, Jan Streffing¹, Suvarchal Kumar Cheedela¹, Maqsood Mubarak Rajput¹, Miguel Andrés-Martínez¹, Mohammed Hussam Al Turjman¹, Razvan Aguridan³, Matteo Nurisso⁴, Jan Wehner¹, and Thomas Jung¹

Sebastian Beyer et al.

¹Alfred Wegener Institute Helmholtz Centre for Marine and Polar Research, Climate Dynamics, Bremerhaven, Germany
²European Center for Medium-range Weather Forecasts, Bonn, Germany
³Barcelona Supercomputing Center, Barcelona, Spain
⁴Istituto di Scienze dell’Atmosfera e del Clima, Consiglio Nazionale delle Ricerche (CNR-ISAC), Torino, Italy

We present the current IFS-FESOM model configuration of the Destination Earth (DestinE) project, which we used to compute a coupled climate projection (SSP-3.70) from 2020 to 2040 with unprecedented storm-resolving resolution. The atmospheric resolution of 4.4 km allows us to replace previously necessary parametrizations with explicitly resolved atmospheric dynamics. The unstructured NG5 ocean mesh, which locally reaches below 5 km resolution, resolves mesoscale ocean eddies and sea ice leads.

IFS-FESOM consists of the Integrated Forecasting System (IFS, developed by ECMWF) coupled to the Finite Volume Sea Ice-Ocean Model FESOM2. It utilizes the IO-server and post-processing toolkit multIO, providing hourly outputs and statistical processing of numerous variables. It also takes advantage of recent improvements to the IFS, including enhanced representations of snow and land use, as well as a dedicated scheme for urban areas and cities worldwide.

We present initial results from analyzing the simulation, addressing technical challenges and scientific questions related to running km-scale simulations over multiple decades.

How to cite: Beyer, S., Rackow, T., Sidorenko, D., Koldunov, N., John, A., Ghosh, R., Streffing, J., Cheedela, S. K., Rajput, M. M., Andrés-Martínez, M., Al Turjman, M. H., Aguridan, R., Nurisso, M., Wehner, J., and Jung, T.: 4.4-km global climate projections with IFS-FESOM, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-18012, https://doi.org/10.5194/egusphere-egu25-18012, 2025.