A University of Georgia study using a new method for calculating urban
heat island intensities clarifies the conflict on whether urban density or sprawl amplify these effects more.
The use of spatially gridded temperature data, rather than urban versus rural point comparisons, represents a new method for calculating a city's
canopy heat island intensity.
In Wang et al (1990) Wang and Karl concluded that over the 30 year period of their study (which used the same raw data from eastern China for the same period as Jones at al) ``... results suggest a general increase
in heat island intensity of about 0.1 C, but this has not been constant in time.»
«Not just whether cities have high - density development, but how the built infrastructure is connected — and disconnected by green spaces — has a great impact
on heat island intensity,» said study co-author Marshall Shepherd, the UGA Athletic Association Distinguished Professor of Geography and Atmospheric Sciences.
The researchers used Beijing in summer of 2012 to calculate that switching vehicles from gas to electricity could reduce
the heat island intensity by nearly 1 degree Celsius.
Conventional vehicles and air conditioners are the two biggest contributors to
the heat island intensity — the difference between urban temperatures and the cooler temperatures of rural areas.