Digital Representation of Soil-Plant System

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The coupled STEMMUS-SCOPE model is a digital replica of soil-plant system (see Figure 3). The coupled STEMMUS-SCOPE model integrates the SIF remote sensing with the plant-hydraulics-based SPAC model to advance our mechanism understanding of the complex soil-water-plant-energy interaction. The SIF remote sensing can acquire explicit information about photosynthetic light responses and steady-state behaviors in vegetation to evaluate photosynthesis and water-stress effects, across a range of biological, spatial and temporal scales. The plant-hydraulics-based SPAC model links mechanistically tissue-level stress to ecosystem-level water and carbon fluxes, via a resistor-based manner with the tissue-level hydraulic traits (of roots, stems and leaves) and stomatal optimality theory (i.e., photosynthetic gain vs. hydraulic risk).

Figure 3 Physically-based process model, STEMMUS-SCOPE, as a digital replica of soil-plant system (Wang et al. 2020 GMD)

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