Then the depression formation in tropical easterly flow is discussed.
由此讨论了热带东风气流中的低压形成。
Under conditions of easterly flow, therefore, or very large westerly flow no vertical propagation will occur .
所以在东向气流或很大的西向气流的情况下，将不发生垂直传播。
When the tropical easterly flow decreases, the center position of depression moves northward, the strength of depression increases and the zonal width of depression widens.
当热带东风气流减弱时，低压中心位置偏北，低压强度增强，低压纬向宽度变大；
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