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Integrated Biosphere Simulator : ウィキペディア英語版 | Integrated Biosphere Simulator IBIS-2 is the version 2 of the land-surface model Integrated Biosphere Simulator (IBIS), which includes several major improvements and additions to the prototype model developed by Foley et al. (). IBIS was designed to explicitly link land surface and hydrological processes, terrestrial biogeochemical cycles, and vegetation dynamics within a single physically consistent framework 〔(et al. 2000 ).〕 ==IBIS Functionality==
The model considers transient changes in vegetation composition and structure in response to environmental change and is, therefore, classified as a Dynamic Global Vegetation Model (DGVM) 〔(et al. 1992; Walker, 1994; W. Cramer et al., Dynamic responses of global terrestrial vegetation changes in CO2 and climate, submitted to Global Change Biology, 1999 ).〕 This new version of IBIS has improved representations of land surface physics, plant physiology, canopy phenology, plant functional type (PFT) differences, and carbon allocation. Furthermore, IBIS-2 includes a new belowground biogeochemistry submodel, which is coupled to detritus production (litterfall and fine root turnover). All process are organized in a hierarchical framework and operate at different time steps, ranging from 60 min to 1 year. Such an approach allows for explicit coupling among ecological, biophysical, and physiological processes occurring on different timescales.
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