ENERGY BALANCE : Energy Balance Equation Flashcards
shortwave radiation not affected by the atmosphere.
Direct solar radiation (S)
shortwave radiation that has been scattered by gases or particles in the
atmosphere.
Diffuse radiation (D)
total incoming solar radiation
Incoming shortwave radiation or insolation (K↓)
K↓ = ___ + ___
K↓ = S + D (Direct solar radiation + Diffuse radiation)
proportion of light reflected from a surface (0 to 1); α = K↑ / K↓
Albedo (α)
shortwave radiation reflected from the surface
Outgoing shortwave radiation (αK↓ or K↑)
difference between incoming and outgoing shortwave radiation (K* = 0 at night); K* = K↓ - αK↓
Net shortwave radiation (K*)
energy emitted by the earth surface.
Outgoing longwave radiation (L↑)
radiation emitted from the atmosphere downward.
Incoming longwave radiation (L↓)
difference between incoming and outgoing longwave radiation; L* = L↓ - L↑
Net longwave radiation (L*)
sum of net shortwave and net longwave radiation; Rn = K* + L*
Net radiant energy (Rn)
energy absorbed or released during water phase changes (without changing temperature)
Latent heat flux (Lh)
fraction of net radiation dissipated into the soil
Conductive heat flux (Ch)
the flow of heat between surface and air by convection
Sensible heat flux (Sh)
difference between incoming and outgoing radiation and dissipation fluxes
Net energy (QE)
