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Moisture stored in the soil controls the partitioning of energy and water fluxes through the land surface. Understanding and quantifying this partitioning is key for the performance of hydrological models. Biosphere 2 offers unique environmental controls to study the partitioning of transpiration and evaporation for different ecosystems.
Experimental Approach:
Dry-down experiment in piñion pines at B2: nine piñon pines and three soil pots are located at three different temperature and humidity regimes: ambient temperature, +4°C and +4°C with +7% higher humidity. The weight of each pot (Lysimeter) and soil moisture at 5 different depths (Figure 2) is monitored continuously together with measurements of energy fluxes above the canopy (Figure 1). Simultaneously, needles and soil samples have been taken for isotope analysis.
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