Comparing global models of terrestrial net primary productivity (NPP): overview and key results
1999
Kicklighter, D. | Bondeau, Alberte | Schloss, A. | Kaduk, J. | Mcguire, A. David | Churkina, G. | Cramer, Wolfgang | Colinet, G. | Collatz, J. | Dedieu, G. | Emanuel, W. | Esser, G. | Field, C. | François, L. | Friend, A. | Haxeltine, A. | Heimann, M. | Hoffstadt, J. | Kergoat, L. | Kicklighter, D. W. | Knorr, W. | Kohlmaier, G. | Lurin, B. | Maisongrande, P. | Martin, P. | Mckeown, R. | Meeson, B. | Moore Iii, Berrien | Nemani, R. | Nemry, B. | Olson, R. | Otto, R. | Parton, W. | Prince, S. | Randerson, J. | Rasool, I. | Rizzo, B. | Ruimy, A. | Running, S. | Sahagian, D. | Saugier, B. | Schloss, A. L. | Scurlock, J. | Steffen, W. | Warnant, P. | Wittenberg, U. | Potsdam Institute for Climate Impact Research (PIK) | Department of Geography [Leicester] ; University of Leicester | Leibniz-Zentrum für Agrarlandschaftsforschung = Leibniz Centre for Agricultural Landscape Research (ZALF) | Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich (ULiège) | School of Community and Regional Planning ; School of Community and Regional Planning | Max Planck Institute for Biogeochemistry (MPI-BGC) ; Max-Planck-Gesellschaft | Centre d'études spatiales de la biosphère (CESBIO) ; Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) ; Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | University of New Hampshire (UNH)
International audience
اظهر المزيد [+] اقل [-]إنجليزي. Given that neither absolute measures nor direct model validations of global terrestrial net primary productivity (NPP) are feasible, intercomparison of global NPP models provides an effective tool to check model consistency. For this study, we tested the assumption that water availability is the primary limiting factor of NPP in global terrestrial biospheric models. We compared a water balance coefficient (WBC), calculated as the difference of mean annual precipitation and potential evapotranspiration to NPP for each grid cell (0.5° × 0.5° longitude/latitude) in each of 14 models. We also evaluated different approaches used for introducing water budget limitations on NPP: (1) direct physiological control on evapotranspiration through canopy conductance; (2) climatological computation of constraints from supply/demand for ecosystem productivity; and (3) water limitation inferred from satellite data alone. Plots of NPP vs. WBC showed comparable patterns for the models using the same method for water balance limitation on NPP. While correlation plots revealed similar patterns for most global models, other environmental controls on NPP introduced substantial variability.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique