Figure 2

Time series of (a) zonal and (b) meridional components and (c,d) hodographs of absolute (mostly tidal) horizontal current vectors at the upper (25 m, orange) and lower (65 m, green) depths in the SAVEX-15 area (water depth: 100 m), ~50 km east of the IORS in May 2015. Time series of (a) zonal and (b) meridional components and (c,d) hodographs of absolute (tidal plus subtidal) horizontal current vectors at the upper (25 m, orange) and lower (65 m, green) depths in the SAVEX-15 area (water depth: 100 m), ~50 km east of the IORS in May 2015. In (a) and (b), each component observed during the SAVEX-15 cruise (thick solid line) and reproduced by the ROMS (dashed line) are superimposed. The reproduced and observed horizontal current vectors are shown by circles with an interval of one hour in (c) and (d), respectively. Open diamond symbols denote a time difference of 48.00 hours to compare the relative phase of tidal currents over the period shown in (a) and (b). The model data during the observational gap period caused by acoustic experiments (when the ADCP turned off) were not used here. In (e), shown are the tidal amplitudes and phases of for 8 major tidal constituents reproduced by the ROMS (red) and observed at the IORS (blue) for the period from April to June 2015.