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Surface energy balance

Dwg file at 1:100 scale (meters)

Components of the surface energy balance on a summer day at Pitt Meadows, Canada (49°N), over irrigated farmland (graph from Stull, 1988; data from Oke, 1978) 
The ratio of the sensible heat flux to the latent heat flux is called Bowen's ratio

β = Qh /Qe

and depends on the available moisture in the soil, the type of soil and the ground cover
(type of vegetation etc.)

Land Cover – Typical Bowen Ratio Values

Semi-arid regions: 5 
Grassy terrain: 0.5
Forests: 0.5
Irrigated grassland: 0.2
Sea: 0.1
 

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