4. The energy balance evaluated
The existence of the warming of the air, results from the modification of the energy balance in the urban
environment. A portion of the net energy arriving at the soil heats it by conduction, another to the evaporation of
water and another to change the atmosphere by convection. And because our investigation site lack of vegetation, so
the photochemical processes of assimilation chlorophyll of plants are neglected in our case, therefore the energy
balance is defined by the following equation:
Rn = H + LvE + G + J (1)
Climatic conditions of the considered site are subject to the arid climate. Situations that interest us are
corresponding a three hot days under typical conditions of summer. Therefore, measures will be for three days: 8, 9
and 10 July 2012 (days included in the overheating zone in the city of Biskra). Assume that there is a permanent
regime; the sensors will be fixed with no changes at all the measurement period.
4. The energy balance evaluated
The existence of the warming of the air, results from the modification of the energy balance in the urban
environment. A portion of the net energy arriving at the soil heats it by conduction, another to the evaporation of
water and another to change the atmosphere by convection. And because our investigation site lack of vegetation, so
the photochemical processes of assimilation chlorophyll of plants are neglected in our case, therefore the energy
balance is defined by the following equation:
Rn = H + LvE + G + J (1)
Climatic conditions of the considered site are subject to the arid climate. Situations that interest us are
corresponding a three hot days under typical conditions of summer. Therefore, measures will be for three days: 8, 9
and 10 July 2012 (days included in the overheating zone in the city of Biskra). Assume that there is a permanent
regime; the sensors will be fixed with no changes at all the measurement period.
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