Fig. 11
From: Subinertial frequency variations in the axis of the Tsugaru Warm Current east of the Tsugaru Strait
a An example of the velocity at the upper layer (0 m: black contours, m s−1) and lower layer (150 m: gray contours, m s−1) estimated from the JCOPE-T DA data for July 26–27, 2019. The standardized relative vorticity term in Eq. 3 at 150 m is shown by color. The yellow line shows the axis of the Tsugaru Warm Current. b Vertical section of standardized relative vorticity along the axis (color) and divergence of the horizontal velocity (contour: s−1). c Qy (differential of Q in the north–south direction) distribution in the cross front direction (141.3–141.4°E average) (color) with vertical shear (black contours: s−1). Gray contours in c denote zonal velocity. Dashed contours in b and c denote negative values. Topography in c is the zonal mean for 141.3–141.4°E