因此，海洋在夏季吸收越多的太阳能量，那么在秋季就需要更长的时间来冷却海水，使它结冰。

The more solar energy the ocean absorbs during the summer, the longer it takes in the fall for the water to cool down enough to freeze.

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相比之下，亚热带海洋的浮游植物的种群数量在夏季回落。

In the subtropical oceans, by contrast, phytoplankton populations drop off in summer.

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这项报告预测北极海洋在30或40年间有可能会在夏季的那几个月里变成没有冰层覆盖的海面。

The report forecasts that the Arctic Ocean, within three or four decades, will likely become nearly ice free during the summer months.

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