EARTHSC 2C03 Lecture Notes - Lecture 16: Soil, Stoma, Transpiration
15 Feb 2017
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Document Summary
Vegetation plays an important role in energy and mass exchange from soil-vegetation-atmosphere systems. It is necessary to consider a volume for energy and mass exchange over soil-vegetation-atmosphere systems because the presence of vegetation complicates this system. 1 (a) energy balance and water storage in vegetation systems: P where qs is net rate of physical heat storage by substances in the system such as air, soil, and plant biomass. Qp is net rate of biochemical energy storage due to photosynthesis. Biochemical energy storage change is related to the rate of co2 assimilation by plants. There might be an advection term, qa, in the above equation representing a gain or loss due to horizontal sensible heat and latent heat transport. The water balance of a soil-vegetation-atmosphere system is given by: Ep r where s represents the net water storage in air, soil and plants. If advection is present then a may be added to the above equation.
