Numerical evaluation of enhanced green infrastructures for mitigating urban heat in a desert urban setting

Abstract The cities of desert climates are anticipated to recognize a synergy urban heat island (UHI) and severe waves during summertime. To improve the thermal environment, present study aims quantitatively explore strategically designed network vegetation patches called green infrastructure (GI) in subtropical such as Dubai. achieve more comfortable temperature we built simulated four GI situations with higher fractions, GI25, GI50, GI75, GI100. Using mesoscale model, mosaic approach is utilized test potential improvement climate impact, portion each grid cell model domain altered various species by 25%, 50%, 75%, 100%. daily peak reduction ambient at 17:00LT similar 0.0168 °C per unit increase when compared untreated scenario; however, maximum daytime summer decline for GI100 0.6 °C, 1.1 1.4 1.7 respectively. associated nighttime 0.0432 drop around 2.4 scenario. Increased reduces height planetary boundary layer (PBL) up 468 m, which might lead greater pollution concentrations. While GI-based cooling has significant influence on delayed sea breeze humidity, it may raise risk discomfort indoor building environment. This adds our understanding mitigation well seasonal impact developing GIs layer.