Theory 92/Urban & Built Environment/Urban heat
Heat Island Tips on Green Cover
The claim
Urban heat island intensity falls sharply above a threshold in green cover fraction, rather than declining gradually with vegetation.
01Mechanism
Evapotranspiration and shading remove heat; below the threshold, the built surface dominates and the effect is additive.
02Prediction
Intensity should drop abruptly above a cover fraction.
03Refutation
Intensity tracking mean cover linearly would remove the threshold.