Fig. 1.

(A–C) Profiles of (A) the thermocline coefficient $\eta (x)$, (B) the zonal structure of the wind burst $s_p(x)$ with its peak at $x^{\ast }$, and (C) the surface wind response in the equatorial Pacific band (from 15^°S to 15^°N) to a mean easterly trade wind anomaly ${\widehat{a}}_p$.