Figure 4

(a) Homogeneous correlation map of mode-1 northern SCS EOF(η’) (57%; domain shown in blue) with AVISO SLA in the western North Pacific from 1993–2013, showing that the SCS η’ is closely related to the SLA fluctuations over the warm pool, in particular to the fluctuations in the vicinity of the NECBF point near 12~13oN. (b) Correlation between NECBF with AVISO SLA in the red domain of (a); dots show correlations significant at the 95% confidence level. In SCS and warm pool, SLA drops (rises) as NECBF shifts north (south) [Chang and Oey 2012]. Maps plotted using MATLAB Version#R2012a (7.14.0.739) 64-bit (glnxa64) (https://www.mathworks.com/support/sysreq/previous_releases.html).