Active Spread and Bias

Active Diffusion Uses Speed and Time

A deterministic active-spread scale uses speed squared times persistence time. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Use speed and persistence time

The active speed is 4 m/s and the persistence time is 3 s.

4 m/s3 s4\ \text{m/s}\quad3\ \text{s}
Active diffusion scale ledgerA deterministic active spread scale uses speed squared times time.speedactive spread

Square speed, multiply time, then halve

The active diffusion scale is 24 square meters per second.

42⋅3/2=24 m2/s4^{2}\cdot3/2=24\ \text{m}^{2}/\text{s}
Active diffusion scale ledgerA deterministic active spread scale uses speed squared times time.speedactive spread