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C and N models Intercomparison – benchmark and ensemble model estimates for grassland production
journal contribution
posted on 2023-05-22, 02:47 authored by Sandor, R, Ehrhardt, F, Basso, B, Bellocchi, G, Bhatia, A, Brilli, L, De Antoni Migliorati, M, Doltra, J, Dorich, C, Doro, L, Fitton, N, Giacomini, S, Grace, P, Grant, B, Matthew HarrisonMatthew Harrison, Jones, S, Kirschbaum, MUF, Klumpp, K, Laville, P, Leonard, J, Liebig, M, Lieffering, M, Martin, R, McAuliffe, R, Meier, E, Merbold, L, Moore, A, Myrgiotis, V, Newton, P, Pattey, E, Recous, S, Rolinski, S, Sharp, J, Massad, RS, Smith, P, Smith, W, Snow, V, Wu, L, Zhang, Q, Soussana, JFMuch of the uncertainty in crop and grassland model predictions of how arable and grassland systems respond to changes in management and environmental drivers can be attributed to differences in the structure of these models. This has created an urgent need for international benchmarking of models, in which uncertainties are estimated by running several models that simulate the same physical and management conditions (ensemble modelling) to generate expanded envelopes of uncertainty in model predictions (Asseng et al., 2013). Simulations of C and N fluxes, in particular, are inherently uncertain because they are driven by complex interactions (Sándor et al., 2016) and complicated by considerable spatial and temporal variability in the measurements. In this context, the Integrative Research Group of the Global Research Alliance (GRA) on Agricultural Greenhouse Gases promotes a coordinated activity across multiple international projects (e.g. C and N Models Inter-comparison and Improvement to assess management options for GHG mitigation in agrosystems worldwide (C-N MIP) and Models4Pastures of the FACCE-JPI, https://www.faccejpi.com) to benchmark and compare simulation models that estimate C–N related outputs (including greenhouse gas emissions) from arable crop and grassland systems ( http://globalresearchalliance.org/e/model-intercomparison-on-agricultural-ghg-emissions). This study presents some preliminary results on the uncertainty of outputs from 12 grassland models, whereas exploring differences in model response when increasing data resources are used for model calibration.
Funding
Department of Agriculture
History
Publication title
Advances in Animal BiosciencesVolume
7Pagination
245-247ISSN
2040-4700Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Cambridge University PressPlace of publication
United KingdomRepository Status
- Restricted