Ratio of the fraction of grains entrained for σ(v) = 0 (i.e. η₀) and the fraction of grains entrained for σ(v) = 100 m s⁻¹ (i.e. η_σ(v)) for bins of 10 AU along the launching area. For clarity, we required at least 20 grains to be entrained for either η > 0. While there are distinct deviations between η₀ and η_σ(v), they do not exhibit a clear pattern. Dips to 0 indicate regions where σ(v) > 0 allows for additional wind pick-up of some dust particles that could not have been entrained with σ(v) = 0.