New paper “accepted” -Improved representation of plant functional types and physiology in the Joint UK Land Environment Simulator (JULES v4.2) using plant trait information

Text by Lauri Laanisto

“Accepted” in the title is between quotation marks, because this “star-laden” paper, where Ülo is also one of the co-authors:

Citation: Harper, Anna, Cox, Peter, Friedlingstein, Pierre, Wiltshire, Andy, Jones, Chris, Sitch, Stephen, Mercado, Lina M., Groenendijk, Margriet, Robertson, Eddy, Kattge, Jens, Bönisch, Gerhard, Atkin, Owen K., Bahn, Michael, Cornelissen, Johannes, Niinemets, Ülo, Onipchenko, Vladimir, Peñuelas, Josep, Poorter, Lourens, Reich, Peter B., Soudzilovskaia, Nadia, and van Bodegom, Peter: Improved representation of plant functional types and physiology in the Joint UK Land Environment Simulator (JULES v4.2) using plant trait information, Geosci. Model Dev. Discuss., doi:10.5194/gmd-2016-22, in review, 2016. (link to full text)

is submitted to a journal that practices interactive public peer review process (about that). So, you can go to Geosicentific Model Development page and review/discuss this particular paper during the next two months (deadline is in 28th of March).


Overview of the basics of science of JULES model (pic from here)


Dynamic global vegetation models are used to predict the response of vegetation to climate change. They are essential for planning ecosystem management, understanding carbon cycleclimate feedbacks, and evaluating the potential impacts of climate change on global ecosystems. JULES (the Joint UK Land Environment Simulator) represents terrestrial processes in the UK Hadley Centre family of models and in the first generation UK Earth System Model. Previously, JULES represented five plant functional types (PFTs): broadleaf trees, needle-leaf trees, C3 and C4 grasses, and shrubs. This study addresses three developments in JULES. First, trees and shrubs were split into deciduous and evergreen PFTs to better represent the range of leaf lifespans and metabolic capacities that exists in nature. Second, we distinguished between temperate and tropical broadleaf evergreen trees. These first two changes result in a new set of nine PFTs: tropical and temperate broadleaf evergreen trees, broadleaf deciduous trees, needle-leaf evergreen and deciduous trees, C3 and C4 grasses, and evergreen and deciduous shrubs. Third, using data from the TRY database, we updated the relationship between leaf nitrogen and the maximum rate of carboxylation of Rubisco (Vcmax), and updated the model phenology to include a trade-off between leaf lifespan and leaf mass per unit area.

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