Fig. 7.

Schematic diagrams of the physical conditions during the usual (a) and unusual (b) distributions of seaweed rafts in the East China Sea. The two blue solid lines and the solid arrow represent the main stream of the Kuroshio Current and its current. The empty and solid black arrows are the predominant wind direction and Ekman drift current in the surface layer, respectively. Red and pink areas indicate high SSH and relatively lower high SSH. The red and pink arrows are the geostrophic currents associated with the corresponding SSH