极面;
The magnitude of seasonally meridional migration in the location of the primary Polar Front ( PF1) is much less than that of the climatic monthly mean zero wind stress curl, but is near the mean position of zero wind stress curl.
第一极锋(PF1)位置的经向季节变化幅度远小于气候月平均零旋度线的经向季节变化幅度,但位于零旋度线的平均位置附近。
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