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| The Earth system model CLIMBER-X v1.0 – Part 2: the global carbon cycle Willeit, M.; Ilyina, T.; Liu, B.; Heinze, C.; Perrette, M.; Heinemann, M.; Dalmonech, D.; Brovkin, V.; Munhoven, G.; Börker, J.; Hartmann, J.; Romero-Mujalli, G.; Ganopolski, A. (2023). The Earth system model CLIMBER-X v1.0 – Part 2: the global carbon cycle. Geosci. Model Dev. 16(12): 3501-3534. https://dx.doi.org/10.5194/gmd-16-3501-2023
In: Geoscientific Model Development. Copernicus Publications: Göttingen. ISSN 1991-959X; e-ISSN 1991-9603, meer
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| Abstract |
A comprehensive evaluation of the model performance for the present day and the historical period shows that CLIMBER-X is capable of realistically reproducing the historical evolution of atmospheric CO2 and CH4 but also the spatial distribution of carbon on land and the 3D structure of biogeochemical ocean tracers. The analysis of model performance is complemented by an assessment of carbon cycle feedbacks and model sensitivities compared to state-of-the-art Coupled Model Intercomparison Project Phase 6 (CMIP6) models. Enabling an interactive carbon cycle in CLIMBER-X results in a relatively minor slow-down of model computational performance by ∼ 20 % compared to a throughput of ∼ 10 000 simulation years per day on a single node with 16 CPUs on a high-performance computer in a climate-only model set-up. CLIMBER-X is therefore well suited to investigating the feedbacks between climate and the carbon cycle on temporal scales ranging from decades to >100 000 years. |
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