RT Journal Article
T1 nextGEMS: entering the era of kilometer-scale earth system modeling
A1 Segura, Hans
A1 Pedruzo-Bagazgoitia, Xabier
A1 Weiss, Philipp
A1 Müller, Sebastian K.
A1 Rackow, Thomas
A1 Lee, Junhong
A1 Dolores Tesillos, Edgar
A1 Benedict, Imme
A1 Aengenheyster, Matthias
A1 Aguridan, Razvan
A1 Arduini, Gabriele
A1 Baker, Alexander J.
A1 Bao, Jiawei
A1 Bastin, Swantje
A1 Baulenas, Eulàlia
A1 Becker, Tobias
A1 Beyer, Sebastian
A1 Bockelmann, Hendryk
A1 Brüggemann, Nils
A1 Brunner, Lukas
A1 Cheedela, Suvarchal K.
A1 Das, Sushant
A1 Denissen, Jasper
A1 Dragaud, Ian
A1 Dziekan, Piotr
A1 Ekblom, Madeleine
A1 Engels, Jan Frederik
A1 Esch, Monika
A1 Forbes, Richard
A1 Frauen, Claudia
A1 Freischem, Lilli
A1 García Maroto, Diego
A1 Geier, Philipp
A1 Gierz, Paul
A1 González Cervera, Álvaro
A1 Grayson, Katherine
A1 Griffith, Matthew
A1 Gutjahr, Oliver
A1 Haak, Helmuth
A1 Hadade, Ioan
A1 Haslehner, Kerstin
A1 ul Hasson, Shabeh
A1 Hegewald, Jan
A1 Kluft, Lukas
A1 Koldunov, Aleksei
A1 Koldunov, Nikolay
A1 Kölling, Tobias
A1 Koseki, Shunya
A1 Kosukhin, Sergey
A1 Kousal, Josh
A1 Kuma, Peter
A1 Kumar, Arjun U.
A1 Li, Rumeng
A1 Maury, Nicolas
A1 Meindl, Maximilian
A1 Milinski, Sebastian
A1 Mogensen, Kristian
A1 Niraula, Bimochan
A1 Nowak, Jakub
A1 Praturi, Divya Sri
A1 Proske, Ulrike
A1 Putrasahan, Dian
A1 Redler, René
A1 Santuy Muñoz, David
A1 Sármány, Domokos
A1 Schnur, Reiner
A1 Scholz, Patrick
A1 Sidorenko, Dmitry
A1 Spät, Dorian
A1 Sützl, Birgit
A1 Takasuka, Daisuke
A1 Tompkins, Adrian
A1 Uribe, Alejandro
A1 Valentini, Mirco
A1 Veerman, Menno
A1 Voigt, Aiko
A1 Warnau, Sarah
A1 Wachsmann, Fabian
A1 Wacławczyk, Marta
A1 Wedi, Nils
A1 Wieners, Karl-Hermann
A1 Wille, Jonathan
A1 Winkler, Marius
A1 Wu, Yuting
A1 Ziemen, Florian
A1 Zimmermann, Janos
A1 Bender, Frida A.-M.
A1 Bojovic, Dragana
A1 Bony, Sandrine
A1 Bordoni, Simona
A1 Brehmer, Patrice
A1 Dengler, Marcus
A1 Dutra, Emanuel
A1 Faye, Saliou
A1 Fischer, Erich
A1 van Heerwaarden, Chiel
A1 Hohenegger, Cathy
A1 Järvinen, Heikki
A1 Jochum, Markus
A1 Jung, Thomas
A1 Jungclaus, Johann H.
A1 Keenlyside, Noel S.
A1 Klocke, Daniel
A1 Konow, Heike
A1 Klose, Martina
A1 Malinowski, Szymon
A1 Martius, Olivia
A1 Mauritsen, Thorsten
A1 Mellado, Juan Pedro
A1 Mieslinger, Theresa
A1 Mohino Harris, Elsa
A1 Pawłowska, Hanna
A1 Peters-von Gehlen, Karsten
A1 Sarré, Abdoulaye
A1 Sobhani, Pajam
A1 Stier, Philip
A1 Tuppi, Lauri
A1 Vidale, Pier Luigi
A1 Sandu, Irina
A1 Stevens, Bjorn
AB The Next Generation of Earth Modeling Systems (nextGEMS) project aimed to produce multidecadal climate simulations, for the first time, with resolved kilometer-scale (km-scale) processes in the ocean, land, and atmosphere. In only 3 years, nextGEMS achieved this milestone with the two km-scale Earth system models, ICOsahedral Non-hydrostatic model (ICON) and Integrated Forecasting System coupled to the Finite-volumE Sea ice-Ocean Model (IFS-FESOM). nextGEMS was based on three cornerstones: (1) developing km-scale Earth system models with small errors in the energy and water balance, (2) performing km-scale climate simulations with a throughput greater than 1 simulated year per day, and (3) facilitating new workflows for an efficient analysis of the large simulations with common data structures and output variables. These cornerstones shaped the timeline of nextGEMS, divided into four cycles. Each cycle marked the release of a new configuration of ICON and IFS-FESOM, which were evaluated at hackathons. The hackathon participants included experts from climate science, software engineering, and high-performance computing as well as users from the energy and agricultural sectors. The continuous efforts over the four cycles allowed us to produce 30-year simulations with ICON and IFS-FESOM, spanning the period 2020–2049 under the SSP3-7.0 scenario. The throughput was about 500 simulated days per day on the Levante supercomputer of the German Climate Computing Center (DKRZ). The simulations employed a horizontal grid of about 5 km resolution in the ocean and 10 km resolution in the atmosphere and land. Aside from this technical achievement, the simulations allowed us to gain new insights into the realism of ICON and IFS-FESOM. Beyond its time frame, nextGEMS builds the foundation of the Climate Change Adaptation Digital Twin developed in the Destination Earth initiative and paves the way for future European research on climate change.
PB Copernicus Publications
SN 1991-959X
YR 2025
FD 2025-10-23
LK https://hdl.handle.net/20.500.14352/130584
UL https://hdl.handle.net/20.500.14352/130584
LA eng
NO Segura, H., Pedruzo-Bagazgoitia, X., Weiss, P., Müller, S. K., Rackow, T., Lee, J., ... & Stevens, B. (2025). nextGEMS: entering the era of kilometer-scale Earth system modeling. Geoscientific Model Development, 18(20), 7735-7761.
NO © Author(s) 2025.
NO European Commission
DS Docta Complutense
RD 25 mar 2026