Fig. 9

Examples of shorter-term variation in the axis of the Tsugaru Warm Current estimated from the high-frequency radar during a winter, b spring, c summer, and d autumn. The thick–light (thin–dark) lines denote earlier (later) dates. The frequency distribution of the ratio of the zonal scale of adjacent meandering peaks (L_p) to the internal deformation radius (L_D) for each season is shown in the subpanels