A roadmap for improving the representation of photosynthesis in Earth system models.

This is the author accepted manuscript. The final version is available from Wiley via the DOI in this record. Accurate representation of photosynthesis in terrestrial biosphere models (TBMs) is essential for robust projections of global change. However, current representations vary markedly between...

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Bibliographic Details
Published in:New Phytologist
Main Authors: Rogers, A, Medlyn, BE, Dukes, JS, Bonan, G, von Caemmerer, S, Dietze, MC, Kattge, J, Leakey, ADB, Mercado, LM, Niinemets, Ü, Prentice, IC, Serbin, SP, Sitch, S, Way, DA, Zaehle, S
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2016
Subjects:
carbon dioxide CO2
light
soil water content
stomatal conductance
temperature
terrestrial biosphere models
vapor pressure deficit (VPD)
Arctic
Online Access:http://hdl.handle.net/10871/30962
https://doi.org/10.1111/nph.14283
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Summary:This is the author accepted manuscript. The final version is available from Wiley via the DOI in this record. Accurate representation of photosynthesis in terrestrial biosphere models (TBMs) is essential for robust projections of global change. However, current representations vary markedly between TBMs, contributing uncertainty to projections of global carbon fluxes. Here we compared the representation of photosynthesis in seven TBMs by examining leaf and canopy level responses of photosynthetic CO2 assimilation (A) to key environmental variables: light, temperature, CO2 concentration, vapor pressure deficit and soil water content. We identified research areas where limited process knowledge prevents inclusion of physiological phenomena in current TBMs and research areas where data are urgently needed for model parameterization or evaluation. We provide a roadmap for new science needed to improve the representation of photosynthesis in the next generation of terrestrial biosphere and Earth system models. The authors thank the New Phytologist Trust for its generous support of the 9 th New Phytologist Workshop – Improving representation of photosyn thesis in Earth System Models – held in Montauk (NY, USA) in April 2014. A.R. and S.P.S. were supported by the Next-Gener ation Ecosystem Experi- ments (NGEE Arctic and NGEE Tropics) proje cts that are supported by the Office of Bi ological and Environmental Research in the Department of Energy, Office of Science, and through the United States Department of Energy contract no. DE-SC00112704 to Brookhaven National Laboratory; D.A.W. acknowledges suppo rt from NSERC, CFI and an Ontario ERA award. J.S.D. received support from NSF (DEB- 0955771).

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