Green Infrastructure Cooling Grid

Green Infrastructure Grid

Tree budget (each side) 18

Live readout

Baseline (no trees)

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Trees placed

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Concentrated avg

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Scattered avg

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Concentrated is cooler by

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How it works

Every tile starts baking at the same impervious-surface baseline. Trees pull their own tile toward a cool shaded-and-transpiring target every step, while every bare tile is continuously reheated toward the hot baseline by direct sun. In between, heat diffuses between neighbouring tiles each step, exactly like air actually mixes over a city block.

tile += diffuse(neighbours - tile)
tile += treeCooling · (coolTarget - tile)   // on tree tiles
tile += solarHeating · (hotBaseline - tile) // on bare tiles

Concentrated (left) — the budget forms one contiguous park. Interior tiles are surrounded mostly by other cool tiles, so diffusion barely reheats them: the cooled zone holds and even spreads a little into its edge.
Scattered (right) — the same number of trees sit alone, spaced apart. Each isolated cool tile is surrounded by hot neighbours, so diffusion reheats it almost as fast as it cools — the citywide average barely moves.
Same tree count, same physics per tree — the only variable is spatial arrangement, and it alone decides whether the mitigation is neighbourhood-scale or invisible in the average.

🌳 Concentrated

🌱 Scattered

Surface / air temperature

coolhot

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