Articles | Volume 16, issue 5
https://doi.org/10.5194/esd-16-1527-2025
https://doi.org/10.5194/esd-16-1527-2025
Research article
 | 
17 Sep 2025
Research article |  | 17 Sep 2025

Carbon–climate feedback higher when assuming Michaelis–Menten kinetics of respiration

Christian Beer

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Cited articles

Alexandrov, G. A., Oikawa, T., and Yamagata, Y.: Climate dependence of the CO2 fertilization effect on terrestrial net primary production, Tellus Series B-Chemical and Physical Meteorology, 55, 669–675, https://doi.org/10.1034/j.1600-0889.2003.00021.x, 2003. 
Arneth, A., Harrison, S. P., Zaehle, S., Tsigaridis, K., Menon, S., Bartlein, P. J., Feichter, J., Korhola, A., Kulmala, M., O'Donnell, D., Schurgers, G., Sorvari, S., and Vesala, T.: Terrestrial biogeochemical feedbacks in the climate system, Nat. Geosci., 3, 525–532, https://doi.org/10.1038/ngeo905, 2010. 
Beer, C.: Simplified model of global biogeochemical feedbacks, Zenodo [code], https://doi.org/10.5281/zenodo.15696851, 2025. 
Brovkin, V., Boysen, L., Raddatz, T., Gayler, V., Loew, A., and Claussen, M.: Evaluation of vegetation cover and land-surface albedo in MPI-ESM CMIP5 simulations, Journal of Advances in Modeling Earth Systems, 5, 48–57, https://doi.org/10.1029/2012MS000169, 2013. 
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Short summary
Fauna and flora respire carbon dioxide into the atmosphere, which is a major carbon flux into the atmosphere. The underlying biochemical processes are complex, and we generalize them either assuming a first-order chemical reaction of carbon and oxygen to carbon dioxide or assuming enzymatic reactions. Here, we show that these assumptions lead to large differences in estimating the carbon–climate feedback until 2100 and the remaining carbon budget to keep warming below 2°C.
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