The combined effect of these properties causes the UHI phenomenon. Anthropogenic heat release from human activities also adds to the accumulation of heat. Second, the geometry of urban surfaces featuring buildings and street canyons leads to reduced overall wind ventilation as a consequence of increased roughness, and to more radiation trapping due to in-canyon reflections 2, 3. First, as impervious surfaces replace natural land cover of low albedo, high thermal capacity, and high thermal conductivity, urban areas exhibit reduced latent heat flux and increased heat absorption 1. The surface energy balance of urban areas differs from that of vegetated land in various aspects. The canopy layer urban heat island (UHI) effect, a phenomenon manifested by elevated near-surface air temperatures in cities compared to their non-urban surroundings, is mainly due to land surface modification in connection with urbanisation.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |