Figure 4

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Rayonnement solaire simulé et mesuré par un albédomètre horizontal placé au milieu du canyon et à 11,7 m au-dessus du sol. Face tournée vers le ciel (Haut) et face tournée vers le bas (Bas). Solar radiation simulated and measured by an horizontal albedometer located in the middle of the canyon at 11.7 m high. The face viewing up (‘Haut’) and the face viewing down (‘Bas’).
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