Now compare to how much an asphalt parking lot raises temperatures.

Parking lots don't generate heat, they just don't absorb it.

Eagerly awaiting your report.

During peak sunlight conditions, a standard black asphalt surface will readily absorb solar radiation, sending its surface temperature to 150°F–190°F . A clean white roof reflects up to 80% of sunlight, and topping out at around 95°F–115°F. (https://sentryroof.com/news/how-hot-does-your-commercial-roo...)

That sounds like more of an argument to build green space, not data centers.