Global long-term mapping of surface temperature shows intensified intra-city urban heat island extremes

A new paper building on the Global Human Settlement-S2 built up layer provides insights into space-time variability of Surface Urban Heat Island (SUHI) at a global scale.
The results reveal that short-term (3-day) maxima of day SUHI can be several degrees higher than seasonally estimated SUHI, with differences up to 10 K and more, while they can vary by an order of magnitude within cities. This can be linked with increasing urbanisation, more frequent heatwaves, and greening of the earth, processes that are all expected to continue in the coming decades.
The management of extreme heat in cities will therefore be a major challenge to improve health and the urban environment.

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