6533b85efe1ef96bd12c0417

RESEARCH PRODUCT

Évaluation des effets thermiques des leviers d'action visant à réduire l'îlot de chaleur urbain : l'exemple de Dijon.

subject

description

Climate Change and Urban Heat Island (UHI) combine their effects and lead to increased frequencies and intensities of heat waves in urban environments. Considering the associated public health issues, several actions are possible: the color of the materials, the development of water surfaces or urban vegetation. In Dijon, a network of 60 stations makes it possible to evaluate the potential of these three actions. Analysis of the warm summer 2016 season reveals that the refreshing role of water only occurs during daytime, the effect of bright surfaces (concrete versus bitumen) on the air temperature is only a few tenths of a degree, while vegetation offers the largest refreshing potential. Its magniture is about 4°C when the early night UHI is well developed, i.e. warm, sunny and calm weather under anticyclonic conditions.