Supplementary material to "Global and regional effects of land-use change on climate in 21st century simulations with interactive carbon cycle" [post]

L. R. Boysen, V. Brovkin, V. K. Arora, P. Cadule, N. de Noblet-Ducoudré, E. Kato, J. Pongratz, V. Gayler
2014 unpublished
Model specifications and LULCC implementation The implementation of LULCC patterns is approached differently among the models (see table S1). Two of the analyzed models, MPI and MIR, implement a transition matrix of annual fractional changes within each grid cell into their dynamic vegetation models. The consequences are possible multiple conversions within individual grid cells, which might actually not be seen in changes of the grid cell's net land cover distribution but in the allocation of
more » ... arbon between the different pools. CAN and IPSL do not model dynamic vegetation and thus, exclude vegetation shifts due to climatic changes. Anthropogenic pastures are excluded in CAN and IPSL simulates increases in grassland whenever an increase in grazing land is required by the LULCC scenario. This has consequences for the comparison of these areas among the models as MPI and MIR-LR both assume that pastures are not affected by fires, resulting into larger areas. CAN is the only model that simulates cropland explicitly whereas the other models treat crops as grassland but specifications are made: MPI and IPSL use a modified phenology, MPI simulates crops with a higher albedo and MIR implements annual crop harvest. The spread between models with and without dynamic vegetation is visible with respect to the area altered by LULCC in 2100 compared to 2006 (figure S1): CAN and IPSL simulate a net change of cultivated area of 2.7 and 2.3 x 10 6 km 2 , respectively. MIR and MPI apply dynamic vegetation models which are capable of accounting for pastures, regrowth and abandonment and thus result in the strongest increases of 5.4 x 10 6 km 2 and 8.2 x 10 6 km 2 , respectively. A detailed description on the participating models, the implementation of land-use maps and the land harmonization project can be found in the analysis of Brovkin et al. (2013) .
doi:10.5194/esdd-5-443-2014-supplement fatcat:lzdapvrvvjeglgeezfmvj4buke