So changes in ocean stratification in the North Pacific like in the Bering Sea and the Northern North Atlantic Greenland Sea area can change the boundary between the polar ocean and the mid-latitude oceans.

因此，北太平洋如白令海和北大西洋格陵兰海域的海洋分层变化可以改变极地海洋和中纬度海洋之间的边界。