4 ms·
Urban heat island
- quickthrower2 7y agoSydney is one of those.
- H8crilA 7y agoAren't all cities one of those? Bigger=bigger impact.
- quickthrower2 7y agoI think it has quite an effect in the summer because the city is cooled by being near the ocean but the western suburbs get super hot, so a 10 degree difference might not be unusual at times, for two places about 30km away.
- haunter 7y agoSo every big city pretty much
- gavia1 7y agoLondon is regularly 3-4° warmer than the towns and village that border the M25 ring road. You can genuinely feel the difference when you take a train into the city and vice versa.
- quickthrower2 7y agoIs that allowing for the time difference between when you get on and get off the train affecting the temperature?
- gavia1 7y agoAbsolutely. If you so wish you can take the train at noon and get off at 12:30 where any temperature difference due to the sun should be minimal.
- majewsky 7y agoNot terribly relevant to your point, but: Noon is actually a time in the day where it is still getting warmer. Temperature usually peaks around 16:00 or 17:00 in the summer. Example: http://wetterstationen.meteomedia.de/?station=104870&wahl=vorhersage http://wetterstationen.meteomedia.de/?station=104870&wahl=vo... (the forecast diagram for my local weather station)
- onetimemanytime 7y agoany idea why? The ground starts releasing accumulated energy or what?
- Albertchrist 7y agoNot only in US. This is applicable to all the major cities in the world.
- Uhhrrr 7y agoFrom the article: 'If the urban heat island theory is correct then instruments should have recorded a bigger temperature rise for calm nights than for windy ones, because wind blows excess heat away from cities and away from the measuring instruments. There was no difference between the calm and windy nights, and one study said that "we show that, globally, temperatures over land have risen as much on windy nights as on calm nights, indicating that the observed overall warming is not a consequence of urban development."' This is really surprising to me. Not least because, on a sunny day, SF can go from pleasant to brutal as soon as a breeze kicks up.
- ccheath 7y agoisn't this also (at least partly) why cities are less likely to be affected by tornadoes?
- eesmith 7y agoQuoting the link: > Research has been done in a few areas suggesting that metropolitan areas are less susceptible to weak tornadoes due to the turbulent mixing caused by the warmth of the urban heat island.