Dynamics and controls of urban heat sink and island phenomena in a desert city: Development of a local climate zone scheme using remotely-sensed inputs

摘要: Abstract This study aims to determine the dynamics and controls of Surface Urban Heat Sinks (SUHS) Islands (SUHI) in desert cities, using Dubai as a case study. A Local Climate Zone (LCZ) schema was developed subdivide city into different zones based on similarities land cover urban geometry. Proximity Gulf Coast also determined for each LCZ. The LCZs were then used sample seasonal daily imagery from MODIS thermal sensor Land Temperature (LST) variations relative sand. Canonical correlation techniques applied which factors explained variability between LST. Our results indicate that daytime SUHS effect is greatest during summer months (typically ∼3.0 °C) with strongest cooling effects open high-rise city. In contrast, night-time SUHI winter ∼3.5 °C) warming compact mid-rise Arabian had largest influence both phenomena, promoting months. However, other parameters associated environment such building height an cooling, larger buildings shade airflow. Likewise, sky view factor contributed warming, higher temperatures limited views sky.