Figure 4

Climatic impact of El Niño on volume transport and the mean volume backscattering strength (MVBS) across the Korea/Tsushima Strait. (a) Monthly average of volume transport during all years and El Niño developing years (2009 and 2015). The shaded area indicates the difference in summer (JJA) volume transport between the two time windows. (b) Averaged summer across-track velocities during all years. (c) Averaged summer across-track velocity anomalies during El Niño developing years. (d) Monthly average MVBS during all years and El Niño decaying years (2010 and 2016). The shaded area indicates the difference in fall (SON) MVBS between the two time windows. (e) Averaged fall MVBS during all years and (f) Averaged fall MVBS anomalies during El Niño decaying years. The figure was created using MATLAB (ver. 9.9.0.1592791 (R2020b) Update 5). The bathymetry is based on the SRTM30_PLUS dataset (https://topex.ucsd.edu/).