Author(s): Walker A; MacBean N; Quaife T; van Bodegom P; Viovy N; Yang X; Xu C
Site ID: XX-PTr
Site Name: Pantropical site
Variables: Model output
Date Range: Jan. 1, 1901 - Dec. 31, 2012
Description: This data package contains model output data and climate input data associated with the New Phytologist publication: Walker, A.P., Quaife, T., van Bodegom, P.M., De Kauwe, M.G., Keenan, T.F., Joiner, J., Lomas, M.R., MacBean, N., Xu, C., Yang, X., Woodward, F.I., 2017. The impact of alternative trait-scaling hypotheses for the maximum photosynthetic carboxylation rate (Vcmax) on global gross primary production. New Phytologist 215, 1370–1386. https://doi.org/10.1111/nph.14623. This dataset contains maximum carboxylation rate at 25 ºC (Vcmax,25), Gross Primary Production (GPP), Net Biome Production (NBP), vegetation carbon, and soil carbon data from Sheffield Dynamic Global Vegetation Model (SDGVM) for multiple trait-scaling methods for scaling Vcmax,25 across Earth, and alternative instantaneous temperature scaling functions. Vcmax,25 values are mean top-leaf values taken during the growing seasons, which were defined as periods during which leaf area index (LAI) was greater than one. Vcmax,25 values were reported prior to scaling of Vcmax by water-stress or leaf-age. The attached metadata file (SDGVM_vcmax_dataset.docx) describes the methods used and explains the organization of data within the included .zip file. This metadata file is also included in PDF format.
QA/QC: Full QA-QC
Methods Description: Data published in associated publication. QA/QC of model code and outputs to ensure correct implementation of trait-scaling hypotheses in the model. The model simulations were run using the CRU-NCEP meteorological dataset 1901-2012 (Le Quéré et al., 2014). PFT distributions were assumed static throughout the whole simulation period and were derived from land cover (LC) maps provided by the ESA CCI project (www.esa-landcover-cci.org). The PFT fractions were derived from the LC maps using the LC to PFT conversion described in Poulter et al., (2015), and adjusted to account for the separation of C3 and C4 species that cannot be detected using MERIS wavebands (Poulter et al., 2015). The resultant PFT maps were then further categorised according to the SDGVM PFT classification. See further methods details in the attached metadata file "SDGVM_vcmax_dataset"
Access Level: Public
Originating Institution(s): Oakridge National Laboratory
Sponsor Organization(s): UK National Centre for Earth Observation
Contact: Walker, Anthony - Oak Ridge National Laboratory (walkerap@ornl.gov)
Version: 1.0
Dataset Citation: Walker A; MacBean N; Quaife T; van Bodegom P; Viovy N; Yang X; Xu C (2021): Global maximum carboxylation rate trait scaling in the Sheffield Dynamic Global Vegetation Model 1901-2012. 1.0. NGEE Tropics Data Collection. (dataset). http://dx.doi.org/10.15486/ngt/1569265
Acknowledgement: Funding for NGEE-Tropics data resources was provided by the U.S. Department of Energy Office of Science, Office of Biological and Environmental Research.
Data Link: Download Dataset
Walker, A. P., Quaife, T. , Bodegom, P. M., De Kauwe, M. G., Keenan, T. F., Joiner, J. , Lomas, M. R., MacBean, N. , Xu, C. , Yang, X. and Woodward, F. I. (2017), The impact of alternative trait‐scaling hypotheses for the maximum photosynthetic carboxylation rate (Vcmax) on global gross primary production. New Phytol, 215: 1370-1386. doi:10.1111/nph.14623
