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Constraints on estimating the CO2 fertilization effect emerge

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Nature 600, 224-225 (2021)


Updates & Corrections

  • Update 13 September 2022: The authors wish to alert readers to the fact that the report on which this comment was based, ‘A constraint on historic growth in global photosynthesis due to increasing CO2’, has been retracted. Some of the comments in this News & Views relying on the accuracy and reproducibility of these data should therefore be reconsidered.


  1. Keenan, T. F. et al. Nature 600, 253–258 (2021).

    Article  Google Scholar 

  2. Etheridge, D. M. et al. J. Geophys. Res. Atmos. 101, 4115–4128 (1996).

    Article  Google Scholar 

  3. Ainsworth, E. A. & Long, S. P. Glob. Change Biol. 27, 27–49 (2021).

    Article  Google Scholar 

  4. Friedlingstein, P. et al. Earth Syst. Sci. Data 12, 3269–3340 (2020).

    Article  Google Scholar 

  5. Ryu, Y., Berry, J. A. & Baldocchi, D. D. Remote Sens. Environ. 223, 95–114 (2019).

    Article  Google Scholar 

  6. Hall, A., Cox, P., Huntingford, C. & Klein, S. Nature Clim. Change 9, 269–278 (2019).

    Article  Google Scholar 

  7. Williamson, M. S. et al. Rev. Mod. Phys. 93, 025004 (2021).

    Article  Google Scholar 

  8. Hungate, B. A., Dukes, J. S., Shaw, M. R., Luo, Y. & Field, C. B. Science 302, 1512–1513 (2003).

    PubMed  Article  Google Scholar 

  9. Arora, V. K. et al. Biogeosciences 17, 4173–4222 (2020).

    Article  Google Scholar 

  10. Fleischer, K. et al. Nature Geosci. 12, 736–741 (2019).

    Article  Google Scholar 

  11. Mercado, L. M. et al. N. Phytol. 218, 1462–1477 (2018).

    Article  Google Scholar 

  12. Xia, J., Yuan, W., Wang, Y.-P. & Zhang, Q. Sci. Rep. 7, 3341 (2017).

    PubMed  Article  Google Scholar 

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Competing Interests

The authors declare no competing interests.


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