Articles | Volume 19, issue 13
https://doi.org/10.5194/gmd-19-5857-2026
https://doi.org/10.5194/gmd-19-5857-2026
Model description paper
 | 
06 Jul 2026
Model description paper |  | 06 Jul 2026

A food crop yield emulator for integration in the compact Earth system model OSCAR (OSCAR-crop v1.0)

Xinrui Liu, Thomas Gasser, Jianmin Ma, Junfeng Liu, Jonas Jägermeyr, Christoph Müller, Christian Folberth, Florian Zabel, Atul K. Jain, Wenfeng Liu, and Heidi Webber

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Cited articles

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Abramoff, R. Z., Ciais, P., Zhu, P., Hasegawa, T., Wakatsuki, H., and Makowski, D.: Adaptation Strategies Strongly Reduce the Future Impacts of Climate Change on Simulated Crop Yields, Earths Future, 11, 2022–003190, https://doi.org/10.1029/2022EF003190, 2023. 
Ackerman, D., Millet, D. B., and Chen, X.: Global Estimates of Inorganic Nitrogen Deposition Across Four Decades, Global Biogeochem. Cy., 33, 100–107, https://doi.org/10.1029/2018GB005990, 2019. 
Ahvo, A., Heino, M., Sandström, V., Chrisendo, D., Jalava, M., and Kummu, M.: Agricultural input shocks affect crop yields more in the high-yielding areas of the world, Nat. Food, https://doi.org/10.1038/s43016-023-00873-z, 2023. 
Ainsworth, E. A. and Long, S. P.: 30 years of free-air carbon dioxide enrichment (FACE): What have we learned about future crop productivity and its potential for adaptation?, Glob. Change Biol., 27, 27–49, https://doi.org/10.1111/gcb.15375, 2021. 
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This paper presents a crop yield emulator for four major crops (maize, rice, soybean, and wheat). Trained on process-based crop model simulations, it captures yield responses to key drivers: atmospheric CO2, temperature, water availability, and nitrogen use. The emulator closely reproduces the behavior of complex crop models and aligns well with FAO (Food and Agriculture Organization)-reported historical yields. It provides a robust and efficient method for representing agricultural outcomes in climate change impact assessments.
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