@article{Keenan:2023:10.1038/s41558-023-01867-2,
author = {Keenan, TF and Luo, X and Stocker, BD and De, Kauwe MG and Medlyn, BE and Prentice, IC and Smith, NG and Terrer, C and Wang, H and Zhang, Y and Zhou, S},
doi = {10.1038/s41558-023-01867-2},
journal = {Nature Climate Change},
pages = {1376--1381},
title = {A constraint on historic growth in global photosynthesis due to rising CO2},
url = {http://dx.doi.org/10.1038/s41558-023-01867-2},
volume = {13},
year = {2023}
}

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TY  - JOUR
AB  - Theory predicts that rising CO2 increases global photosynthesis, a process known as CO2 fertilization, and that this is responsible for a large proportion of the current terrestrial carbon sink. The estimated magnitude of the historic CO2 fertilization, however, differs by an order ofmagnitude between long-term proxies, remote sensing-based estimates and terrestrial biosphere models. Here we constrain the likely historic effect of CO2 on global photosynthesis by combining terrestrial biosphere models, ecological optimality theory, remote sensing approaches and an emergent constraint based on global carbon budget estimates. Our analysis suggests that CO2 fertilization increased global annual terrestrial photosynthesis by 13.5 ± 3.5%, or 15.9 ± 2.9 Pg C u(mean ± standard deviation) between 1981 and 2020. Our results help resolve conflicting estimates of the historic sensitivity of global terrestrial photosynthesis to CO2 and highlight the large impact anthropogenic emissions have had on ecosystems worldwide.
AU  - Keenan,TF
AU  - Luo,X
AU  - Stocker,BD
AU  - De,Kauwe MG
AU  - Medlyn,BE
AU  - Prentice,IC
AU  - Smith,NG
AU  - Terrer,C
AU  - Wang,H
AU  - Zhang,Y
AU  - Zhou,S
DO  - 10.1038/s41558-023-01867-2
EP  - 1381
PY  - 2023///
SN  - 1758-678X
SP  - 1376
TI  - A constraint on historic growth in global photosynthesis due to rising CO2
T2  - Nature Climate Change
UR  - http://dx.doi.org/10.1038/s41558-023-01867-2
UR  - https://www.nature.com/articles/s41558-023-01867-2
UR  - http://hdl.handle.net/10044/1/107464
VL  - 13
ER  - 

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