Antinuclear

Australian news, and some related international items

Australian cities becoming urban heat islands

Urban island heat effect: Rising temperatures in Aussie cities could create death traps

SOME parts of Australia are very hot – unnaturally hot, in fact. They’re turning into death traps, and it’s our own fault. news.com.au   Megan Palin@megan_palin 23 May 17 AUSTRALIAN cities are 5C hotter compared to surrounding areas because of a phenomenon known as the ‘Urban Island Heat’ effect that could eventually turn them into death traps.Densely populated urban areas including Sydney, Melbourne and Brisbane are baring the brunt of the UHI across the country and not even a looming winter can stop it.

The UHI occurs when natural permeable surfaces including grass, plants or bush land are replaced with concrete, asphalt and infrastructure.

According to the Centre for Science

AUSTRALIAN cities are 5C hotter compared to surrounding areas because of a phenomenon known as the ‘Urban Island Heat’ effect that could eventually turn them into death traps.

Densely populated urban areas including Sydney, Melbourne and Brisbane are baring the brunt of the UHI across the country and not even a looming winter can stop it.

The UHI occurs when natural permeable surfaces including grass, plants or bush land are replaced with concrete, asphalt and infrastructure.

According to the Centre for Science Education (UCAR), urban development causes surfaces that were once permeable and moist to become impermeable and dry. They heat up during the day and retain the warmth but infrastructure prevents it from escaping into the cold night.

These changes cause urban regions to become warmer than their rural surroundings, forming an “island” of higher temperatures in the area.

“These surfaces absorb — rather than reflect — the sun’s heat, causing surface temperatures and overall ambient temperatures to rise,” according to a statement from UCAR.

“Displacing trees and vegetation minimised the natural cooling effects of shading and evaporation of water from soil and leaves.

“Tall buildings and narrow streets can heat air trapped between them and reduce air flow. Waste heat from vehicles, factories, and air conditioners may add warmth to their surroundings, further exacerbating the heat island effect.”

The UHI is perpetuated by residents in urban areas who suffer from the effects and increase usage of electric fans and airconditioners for relief. The increased energy demands strain resources which often leads to ‘rolling blackouts’ or power outages and contributed to an even hotter UHI.
But that’s not the only significant impact of the phenomenon.

According to UNSW researchers, extreme city heat could cause train lines to crumble and could cause heat stress, damaging our organs.

“Since 1900, extreme heat events have killed more Australians than bushfires, cyclones, earthquakes, floods and severe storms combined,” the researchers said.

WHAT’S BEING DONE ABOUT IT?……. http://www.news. com.au/technology/environment/ climate-change/urban-island- heat-effect-rising- temperatures-in-aussie-cities- could-create-death-traps/news- story/ 0b035c4707ea8f81e32ee0df4fa546 bf

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May 24, 2017 - Posted by | AUSTRALIA - NATIONAL, climate change - global warming

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