Articles | Volume 18, issue 2
https://doi.org/10.5194/bg-18-669-2021
https://doi.org/10.5194/bg-18-669-2021
Research article
 | 
29 Jan 2021
Research article |  | 29 Jan 2021

Implementation of nitrogen cycle in the CLASSIC land model

Ali Asaadi and Vivek K. Arora

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Cited articles

Alexandrov, G. and Oikawa, T.: TsuBiMo: a biosphere model of the CO2-fertilization effect, Clim. Res., 19, 265–270, 2002. 
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. 
Arora, V. K.: Simulating energy and carbon fluxes over winter wheat using coupled land surface and terrestrial ecosystem models, Agr. Forest Meteorol., 118, 21–47, https://doi.org/10.1016/S0168-1923(03)00073-X, 2003. 
Arora, V. and Asaadi, A.: Implementation of nitrogen cycle in the CLASSIC land model, Zenodo, https://doi.org/10.5281/zenodo.4455929, 2021. 
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Short summary
More than a quarter of the current anthropogenic CO2 emissions are taken up by land, reducing the atmospheric CO2 growth rate. This is because of the CO2 fertilization effect which benefits 80 % of global vegetation. However, if nitrogen and phosphorus nutrients cannot keep up with increasing atmospheric CO2, the magnitude of this terrestrial ecosystem service may reduce in future. This paper implements nitrogen constraints on photosynthesis in a model to understand the mechanisms involved.
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