This phenomenon occurs when the effect of strong volcanic activities begin to weaken and the equatorial trough fills up and retreats southwards.
这种现象发生在强火山活动影响开始减弱，赤道槽南移填塞以后。
The depths of the trough and the deeper peaks are almost coincident with those of the south boundaries of the South Equatorial Current and the Equatorial Undercurrent, respectively.
流速矢量旋转谱水平随深度的变化呈马鞍形，低谷及深处的峰所在深度分别与南赤道流及赤道潜流的南边界所在深度大体一致。
The depths of the trough and the deeper peaks are almost coincident with those of the south boundaries of the South Equatorial Current and the Equatorial Undercurrent, respectively.
流速矢量旋转谱水平随深度的变化呈马鞍形，低谷及深处的峰所在深度分别与南赤道流及赤道潜流的南边界所在深度大体一致。
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