Articles | Volume 20, issue 13
https://doi.org/10.5194/bg-20-2573-2023
https://doi.org/10.5194/bg-20-2573-2023
Research article
 | 
05 Jul 2023
Research article |  | 05 Jul 2023

Optimizing the carbonic anhydrase temperature response and stomatal conductance of carbonyl sulfide leaf uptake in the Simple Biosphere model (SiB4)

Ara Cho, Linda M. J. Kooijmans, Kukka-Maaria Kohonen, Richard Wehr, and Maarten C. Krol

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Cited articles

Badger, M. R. and Price, G. D.: The Role of Carbonic Anhydrase in Photosynthesis. Annu. Rev. Plant Phys., 45, 369–392, https://doi.org/10.1146/annurev.pp.45.060194.002101, 1994. 
Baldocchi, D. D., Luxmoore, R. J., and Hatfield, J. L.: Discerning the forest from the trees: an essay on scaling canopy stomatal conductance, Agr. Forest Meteorol., 54, 197–226, https://doi.org/10.1016/0168-1923(91)90006-C, 1991. 
Ball J. T.: An analysis of stomatal conductance, Doctoral dissertation, Stanford University, https://www.researchgate.net/profile/John-Ball/publication/36285887_An_Analysis_of_Stomatal_Conductance/links/5a0c05bba6fdccc69eda9656/An-Analysis-of-Stomatal-Conductance.pdf (last access: 21 November 2022), 1988. 
Ball, J. T., Woodrow, I. E., and Berry, J. A.: A model predicting stomatal conductance and its contribution to the control of photosynthesis under different environmental conditions, in: Progress in Photosynthesis Research, edited by: Biggins, J., Springer, Dordrecht, 221–224, https://doi.org/10.1007/978-94-017-0519-6_48, 1987. 
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Short summary
Carbonyl sulfide (COS) is a useful constraint for estimating photosynthesis. To simulate COS leaf flux better in the SiB4 model, we propose a novel temperature function for enzyme carbonic anhydrase (CA) activity and optimize conductances using observations. The optimal activity of CA occurs below 40 °C, and Ball–Woodrow–Berry parameters are slightly changed. These reduce/increase uptakes in the tropics/higher latitudes and contribute to resolving discrepancies in the COS global budget.
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