Fig. 3: Spatial distribution of vertical SF5CF3 tracer dispersion and corresponding 1D model simulations.
Map (a) shows the vertical distribution of tracer from seven regional subsets selected using a K-means clustering algorithm. The geographical extents of each subset is represented on the map as translucent, colored shapes, and displayed on each region is a z* vs. tracer profile from each leg compiled from the corresponding area, with the injection depth marked with a black dashed line. Also included is a hypsography A(z) for each region (black line), which has been normalized by tracer concentration. Plot (b) shows profiles of normalized tracer concentration r vs. \(\hat{z}\), where \(\hat{z}={z}^{* }-\)279 m is the vertical coordinate referenced to the injection depth, with error bars representing 95% confidence limits (2σ) derived from a bootstrapping analysis with 1000 random subsets. The wide curves show the best-fitting advection-diffusion model solutions based on the optimization routine explained in “1D Model Fitting”. Plot (c) is similar to (b), showing r and best-fitting 1D model solutions for boundary and interior regions; (Leg 1 is plotted with lighter curves, Leg 2 with darker curves).
