With Chicago as a living lab space, Northwestern study links underground climate change to variations beneath urban areas.<\/p>\n\n\n\n
There is a \u201csilent hazard\u201d lurking underneath our major global cities, and our buildings were not designed to handle it.<\/p>\n\n\n\n
A new Northwestern University study has, for the first time, linked underground climate change to the shifting ground beneath urban areas. As the ground heats up, it also deforms. This phenomenon causes building foundations and the surrounding ground to move excessively (due to expansions and contractions) and even crack, which ultimately affects structures\u2019 long-term operational performance and durability. Researchers also report that past building damage may have been caused by such rising temperatures and expect these issues to continue for years to come.<\/p>\n\n\n\n
Although rising temperatures do pose a threat to our infrastructure, the researchers also view it as a potential opportunity. By capturing the waste heat emitted underground from subterranean transportation systems, parking garages and basement facilities, urban planners could mitigate the effects of underground climate change as well as reuse the heat into an untapped thermal energy resource.<\/p>\n\n\n\n
The study was published July 11<\/a> in Communications Engineering, a Nature Portfolio journal. It marks the first study to quantify ground deformations caused by subsurface heat islands and their effect on civil infrastructure. <\/p>\n\n\n\n \u201cUnderground climate change is a silent hazard,\u201d said Northwestern\u2019s Alessandro Rotta Loria<\/a>, who led the study. \u201cThe ground is deforming as a result of temperature variations, and no existing civil structure or infrastructure is designed to withstand these variations. Although this phenomenon is not dangerous for people\u2019s safety necessarily, it will affect the normal day-to-day operations of foundation systems and civil infrastructure at large.\u201d<\/p>\n\n\n\n