Figure 4. Map of the 21 clusters boundaries obtained from clustering of the oceanographic distance matrix OD_3depths 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.