H p Cp Ts Ta Ta

where, p is the air density; Cp is the specific heat of air, Ta is the aero-dynamic resistance for sensible heat flux (S/m). The aero-dynamic resistance (Ta) can be expressed as (Hatfield et al., 1984) :

where, Z is the reference height (2m); d is the zero plane of displacement (m) ( = 2 h/3 h is the height of vegetation); Zo is the surface roughness height (m) ( = h/8); K is the Von Karman's constant (~ 0.38) and U is the wind speed at Z (m/s).

Soil heat flux can be written as function of net radiation (Ma et al., 1999):

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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