Figure 1.
Schematic of the steps of the regionalization method.
Note that steps 2 to 5 are repeated using trajectories at the 3 depths separately, shown with the three arrows, and then using them altogether.
Figure 2.
Cluster dendrogram of the oceanographic distance matrix OD3depths using the flexible linkage.
Horizontal black lines show the cut-off values for 3 and 22 clusters.
Figure 3.
Within cluster mean connection time as a function of the cluster number for MCT3depths.
White dots are the mean for each cluster, black dots are the mean over all clusters.
Figure 4.
Map of the 21 clusters boundaries obtained from clustering of the oceanographic distance matrix OD3depths using the flexible link.
Each boundary is colored and numbered according to the cut-off distance on the dendrogram (from blue – high distance- to green- low distance). Each region is identified by a letter from A to V. The velocity from the circulation model, averaged for the 4-year (2007–2010) and the 3 depths is overlaid as black vectors.
Figure 5.
Map of the boundary stability (gray scale) derived from the 6 cases of clustering (3 depths×2 linkages).
Boundary stability is defined as the number of occurrence of a boundary in each grid cell among the 6 cases. Boundaries are overlaid as in figure 4.