APFIVE Urban Heat Island Rainfall Increase
Urban heat islands can increase local rainfall by up to 30% due to higher air temperatures. If the baseline rainfall is 50 mm, all of the following statements are true except:
| Scenario | Baseline Rainfall (mm) | Urban Rainfall (mm) |
|---|---|---|
| Without Heat Island | 50 | 50 |
| With Urban Heat Island | 50 | 65 |
A
A 30% increase on 50 mm yields an additional 15 mm of rainfall.
B
The urban rainfall in the presence of a heat island is given by $$1.3 \times 50 = 65$$ mm.
C
Enhanced moisture in heated urban regions can lead to increased precipitation.
D
For a baseline rainfall of 50 mm, the urban heat island effect produces an increased rainfall of 20 mm.
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