Fig 1. Snapshots of plume measurements.

Three different flow conditions were measured (A1 − A3 fast flow, B1 − B3 slow flow, and C1 − C3 boundary flow, for details see Table 1). Top row shows the time-averaged odor concentration for each of the conditions. All concentrations are shown relative to the source concentration. The green triangles and blue dots correspond to the two 16-location grids. A scalebar indicating 5 cm is shown at bottom right corner of A1-C1. The middle and bottom rows (A2-C2, A3-C3) show two typical snapshots of the instantaneous odor concentration for each of the flow conditions.