与大部分海冰（至少目前如此）都有一年左右的历史的北极有所不同，南大洋的海冰很薄且是季节性的。

Unlike the Arctic, where much of the sea ice is — at least for now — year-round, the Southern Ocean's sea ice is thin and seasonal.

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与大部分海冰(至少目前如此)都有一年左右的历史的北极有所不同，南大洋的海冰很薄且是季节性的。

Unlike the Arctic, where much of the sea ice is - at least for now - year-round, the Southern Ocean's sea ice is thin and seasonal.

youdao

南极海岸除了一年中来回变动的海冰外，还有长久存在的冰架（就是附着于海岸线，处于半漂浮状态的厚冰层）。

The presence or absence of sea ice affects both ocean surface waters and ice shelves.

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