Poster's note : important for models that combine biosphere CDR with SRM http://iopscience.iop.org/article/10.1088/1748-9326/aacf68/meta
Triose phosphate limitation in photosynthesis models reduces leaf photosynthesis and global terrestrial carbon storage Danica L Lombardozzi1,8 <https://orcid.org/0000-0003-3557-7929>, Nicholas G Smith2,3, Susan J Cheng4, Jeffrey S Dukes3,5, Thomas D Sharkey6, Alistair Rogers7, Rosie Fisher1and Gordon B Bonan1 Published 10 July 2018 • © 2018 The Author(s). Published by IOP Publishing Ltd Environmental Research Letters <http://iopscience.iop.org/journal/1748-9326> , Volume 13 <http://iopscience.iop.org/volume/1748-9326/13>, Number 7 <http://iopscience.iop.org/issue/1748-9326/13/7> Article PDF <http://iopscience.iop.org/article/10.1088/1748-9326/aacf68/pdf> - 374 Total downloads - [image: Article has an altmetric score of 25] <https://www.altmetric.com/details.php?domain=iopscience.iop.org&citation_id=44205731> - Turn on MathJax <http://iopscience.iop.org/article/10.1088/1748-9326/aacf68/meta#> - Share this article <?subject=Triose%20phosphate%20limitation%20in%20photosynthesis%20models%20reduces%20leaf%20photosynthesis%20and%20global%20terrestrial%20carbon%20storage&body=Triose%20phosphate%20limitation%20in%20photosynthesis%20models%20reduces%20leaf%20photosynthesis%20and%20global%20terrestrial%20carbon%20storage%20-%20https://doi.org/10.1088/1748-9326/aacf68> <http://www.facebook.com/sharer.php?u=https://doi.org/10.1088/1748-9326/aacf68> <http://twitter.com/share?url=https://doi.org/10.1088/1748-9326/aacf68&text=Triose%20phosphate%20limitation%20in%20photosynthesis%20models%20reduces%20leaf%20photosynthesis%20and%20global%20terrestrial%20carbon%20storage&via=IOPscience> <https://plus.google.com/share?url=https://doi.org/10.1088/1748-9326/aacf68> <http://www.citeulike.org/posturl?url=https://doi.org/10.1088/1748-9326/aacf68> <http://www.mendeley.com/import/?doi=10.1088/1748-9326/aacf68> Article information <http://iopscience.iop.org/article/10.1088/1748-9326/aacf68/meta#> Abstract Triose phosphate utilization (TPU)-limited photosynthesis occurs when carbon export from the Calvin-Benson cycle cannot keep pace with carbon inputs and processing. This condition is poorly constrained by observations but may become an increasingly important driver of global carbon cycling under future climate scenarios. However, the consequences of including or omitting TPU limitation in models have seldom been quantified. Here, we assess the impact of changing the representation of TPU limitation on leaf- and global-scale processes. At the leaf scale, TPU limits photosynthesis at cold temperatures, high CO2 concentrations, and high light levels. Consistent with leaf-scale results, global simulations using the Community Land Model version 4.5 illustrate that the standard representation of TPU limits carbon gain under present day and future conditions, most consistently at high latitudes. If the assumed TPU limitation is doubled, further restricting photosynthesis, terrestrial ecosystem carbon pools are reduced by 9 Pg by 2100 under a business-as-usual scenario. The impact of TPU limitation on global terrestrial carbon gain suggests that CO2concentrations may increase more than expected if models omit TPU limitation, and highlights the need to better understand when TPU limitation is important, including variation among different plant types and acclimation to temperature and CO2. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
