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Solar Radiation and Productivity in Tropical Ecosystems. J. L. Monteith. Thermal Dynamics Law. First Law of Thermal Dynamics: Energy conservation R n =LE + H + G+A Second Law of Thermal Dynamics: Production of “useful” energy must be accompanied by simultaneous “waste” of heat.

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thermal dynamics law
Thermal Dynamics Law
  • First Law of Thermal Dynamics: Energy conservation

Rn=LE + H + G+A

  • Second Law of Thermal Dynamics: Production of “useful” energy must be accompanied by simultaneous “waste” of heat.
components of efficiency
Components of Efficiency

ε=εgεaεsεqεiεdεr

Where the components include geometric, atmospheric, spectral, quantum, interception, diffusion and respiration efficiencies

spectral efficiency
Spectral Efficiency
  • PAR to total radiation ratio: 50%
quantum efficiency
Quantum Efficiency
  • Theoretical maximum: 1 Carbohydrate need 10 quanta.
respiration efficiency
Respiration Efficiency

W: standing dry weight (g/m^2)

P: photosynthesis rate (g/m^2/day)