CHICAGO, Illinois – The urban heat island effect goes deeper than the footpath: Pockets of heat in cities exist below ground as well, in what some scientists refer to as underground climate change.
Findings from his study, published on Tuesday in the journal Communications Engineering, do not suggest that the safety and integrity of structures will be compromised. Research suggests temperatures in the shallow ground below various cities across the globe rise at an average rate of between 0.1 deg C and 2.5 deg C per year, depending on factors such as density and layout of the built environment.
In the clay itself, temperatures near those types of structures measured roughly 21.5 deg C – about 10 degrees hotter than areas not heavily affected by the diffusion of heat, such as underneath parks.The team then used that data to create a digital twin of the Loop, including underground structures like the Millennium Garages – the largest underground parking system in North America, comprising four facilities that span 3.
Yet these fluctuations have caused soil layers in the ground to settle and heave, sometimes by more than 10mm. Prof Rotta Loria said even small cracks in building foundations and retaining structures can affect their function.
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