Figure 1.

Geographic distribution of Warm and Cold Core Ring formation during 40 years of study (1980–2019). The four different zones within the ${75}^{\circ }$–${55}^{\circ }\text{W}$ region are: Zone 1: ${75}^{\circ }$–${70}^{\circ }\text{W}$; Zone 2: ${70}^{\circ }$–${65}^{\circ }\text{W}$; Zone 3: ${65}^{\circ }$–${60}^{\circ }\text{W}$; Zone 4: ${60}^{\circ }$–${55}^{\circ }\text{W}$. A total of 1014 Warm Core Rings and 1023 Cold Core Rings were documented over the 40-year period. Percentages represent the number of Warm (Cold) Core Rings that are formed in that zone compared to total number of Warm (Cold) Core Rings. The map was generated using the MATLAB M_Map package¹⁶ with topography contours from ETOPO1¹⁷ and the coastline from Global Self-consistent, Hierarchical, High-resolution Geography Database (GSHHG)¹⁸.