A roadmap for improving the representation of photosynthesis in Earth system models
Alistair Rogers,Belinda E. Medlyn,Jeffrey S. Dukes,Gordon B. Bonan,Susanne von Caemmerer,Michael Dietze,Jens Kattge,Andrew D. B. Leakey,Lina M. Mercado,Ülo Niinemets,I. Colin Prentice,I. Colin Prentice,Shawn P. Serbin,Stephen Sitch,Danielle A. Way,Danielle A. Way,Sönke Zaehle +16 more
TLDR
This work compared the representation of photosynthesis in seven TBMs by examining leaf and canopy level responses of photosynthetic CO2 assimilation to key environmental variables: light, temperature, CO2 concentration, vapor pressure deficit and soil water content.Abstract:
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.read more
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The Community Land Model version 5 : description of new features, benchmarking, and impact of forcing uncertainty
David M. Lawrence,Rosie A. Fisher,Charles D. Koven,Keith W. Oleson,Sean Swenson,Gordon B. Bonan,Nathan Collier,Bardan Ghimire,Leo van Kampenhout,Daniel Kennedy,Erik Kluzek,Peter Lawrence,Fang Li,Hongyi Li,Danica Lombardozzi,William J. Riley,William J. Sacks,Mingjie Shi,Mingjie Shi,Mariana Vertenstein,William R. Wieder,William R. Wieder,Chonggang Xu,Ashehad A. Ali,Andrew M. Badger,Gautam Bisht,Michiel R. van den Broeke,Michael A. Brunke,Sean P. Burns,Sean P. Burns,J. R. Buzan,Martyn P. Clark,Anthony Craig,Kyla M. Dahlin,Beth Drewniak,Joshua B. Fisher,Joshua B. Fisher,Mark Flanner,Andrew M. Fox,Pierre Gentine,Forrest M. Hoffman,Gretchen Keppel-Aleks,Ryan G. Knox,Sanjiv Kumar,Jan T. M. Lenaerts,L. Ruby Leung,William H. Lipscomb,Yaqiong Lu,Ashutosh Pandey,Jon D. Pelletier,J. Perket,J. Perket,James T. Randerson,Daniel M. Ricciuto,Benjamin M. Sanderson,Andrew G. Slater,Z. M. Subin,Jinyun Tang,R. Quinn Thomas,Maria Val Martin,Xubin Zeng +60 more
TL;DR: The Community Land Model (CLM) is the land component of the Community Earth System Model (CESM) and is used in several global and regional modeling systems.
Journal ArticleDOI
Pedotransfer functions in Earth system science: challenges and perspectives
Kris Van Looy,Johan Bouma,Michael Herbst,John Koestel,Budiman Minasny,Umakant Mishra,Carsten Montzka,Attila Nemes,Yakov Pachepsky,José Padarian,Marcel G. Schaap,Brigitta Tóth,Brigitta Tóth,Anne Verhoef,Jan Vanderborght,Martine van der Ploeg,Lutz Weihermüller,Steffen Zacharias,Yonggen Zhang,Yonggen Zhang,Harry Vereecken +20 more
TL;DR: In this article, a review of the existing PTFs and new generation of PTF developed in the different disciplines of Earth system science is presented, emphasizing that PTF development has to go hand in hand with suitable extrapolation and upscaling techniques such that the PTF models correctly represent the spatial heterogeneity of soils.
Journal ArticleDOI
Soil moisture dominates dryness stress on ecosystem production globally.
TL;DR: Satellite observations of solar-induced fluorescence with estimates of SM and VPD show that SM is the dominant driver of dryness stress on ecosystem production across more than 70% of vegetated land areas with valid data, and it is found that SM stress is strongest in semi-arid ecosystems.
Journal ArticleDOI
Drought impacts on terrestrial primary production underestimated by satellite monitoring
Benjamin D. Stocker,Jakob Zscheischler,Jakob Zscheischler,Trevor F. Keenan,Trevor F. Keenan,I. Colin Prentice,Sonia I. Seneviratne,Josep Peñuelas +7 more
TL;DR: In this article, the authors used a globally distributed measurement network to assess the effect of soil moisture on photosynthesis, and identified a common bias in an ensemble of satellite-based estimates of photosynthesis that is governed by the magnitude of the soil moisture effects on photosynthetic light-use efficiency.
Journal ArticleDOI
Changes in Climate and Land Use Over the Amazon Region: Current and Future Variability and Trends
José A. Marengo,Carlos Souza,Kirsten Thonicke,Chantelle Burton,Kate Halladay,Richard Betts,Lincoln M. Alves,Wagner R. Soares +7 more
TL;DR: In this paper, a review of up-to-date information on climate and hydrological variability, and on warming trends in Amazonia, with 2016 as the warmest year since at least 1950 (0.9 °C + 0.3°C).
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