Urban heat’s overlooked fix: Greening the land upwind of cities
A study published in Nature Cities suggests that forests placed strategically outside urban cores can lower temperatures across much of a city.
Strategically placing greenbelts in the suburbs could significantly reduce the urban heat island effect in the world's major cities, suggests a new study. The research reveals that this often-overlooked approach could cool cities by nearly half a degree across up to half their area. Cities like Beijing and Shanghai, situated on plains and coastlines respectively, stand to benefit the most from this strategy.
The study reveals that urban vegetation can create a cool air mass, which prevailing winds then transport into the city core. This upwind greening approach has been proven to work in eight mega-cities, including Cairo, Kinshasa, São Paulo, Houston, Sydney, and London. The cooling effect is generally modest but remains consistent across cities with varying climates, topographies, and urban layouts.
However, the effectiveness of this strategy depends on several factors, including the presence of persistent wind pathways and sufficient space for suburban vegetation. This research encourages cities to consider a holistic approach to climate regulation, integrating vegetation, wind, topography, and surrounding landscapes in their urban planning.
Written by urgent.news from Anthropocene Magazine's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
