Complex sentence: Studies of temperature phenomena consider illumination, angle of incidence, surface albedo, emissivity, temperature and SVF.The higher the SVF, the quicker the urban canyon will cool, because more sky is available to absorb the heat retained by the buildings.
Split into simpler sentences: Studies of temperature phenomena consider irradiance, angle of incidence, surface albedo, emissivity, temperature and SVF. For high SVF, the urban canyons cool quickly, because more sky is available to absorb the heat retained by the buildings.