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Ninety percent of global warming is happening at sea.
90%的全球变暖正发生在海洋里。
Ocean temperatures are on the rise, leaving our planet in hot water.
海洋温度正在上升，导致地球处于水深火热之中。
Here's why.
原因如下。
As Earth experiences a warming climate, we experience hotter air temperatures.
随着地球气候变暖，我们的空气温度也会变高。
Luckily for us, water has a high heat capacity, meaning the ocean absorbs extra heat from the atmosphere, which delays the full impact of global warming.
幸运的是，对我们来说，水有很高的热容量，这意味着海洋能从大气中吸收额外的热量，推迟全球变暖的全面影响。
But here's the bad news.
但有个坏消息。
That heat energy absorbed by the ocean doesn't disappear;
海洋吸收的热能不会消失;
it just moves from one place to another, eventually reentering the rest of the Earth's system by melting ice shelves, evaporating water, or directly reheating the atmosphere.
它只是从一个地方移动到另一个地方，最终会通过融化冰架、蒸发水或直接重新加热大气而再次进入地球系统的其他部分。
Increasing amounts of greenhouse gases are preventing heat radiated from Earth's surface from escaping into space as freely as it used to.
越来越多的温室气体正在阻止地球表面辐射的热量像过去一样自由地逃逸到太空中。
Over the past few decades, upper ocean heat content has increased significantly.
在过去的几十年里，海洋上部的热含量显著增加了。
Since 1901, the average global sea surface temperature has increased about 1.8 degrees Fahrenheit, which may not sound like a lot, but every fraction of a degree matters.
自1901年以来，全球海洋表面平均温度上升了约1.8华氏度，这听起来可能不多，但每一度都很重要。
Water expands when it warms, so if you combine that with even more water from melting glaciers and ice sheets, you get rising sea levels,
水在变暖时会膨胀，所以如果你把它和冰川、冰原融化产生的更多水结合起来，就会导致海平面的上升，
which threaten natural ecosystems, can cause flooding, and will affect billions of people who live in coastal communities around the world.
这威胁到了自然生态系统，可能会导致洪水，并影响生活在世界各地沿海社区的数十亿人。
Warming oceans also cause coral bleaching and marine heat waves.
海洋变暖还会导致珊瑚白化和海洋热浪。
It wreaks havoc on weather patterns, intensifying hurricanes and cyclones, increasing heavy rain and snow events.
它会对天气模式造成严重破坏，加剧飓风和气旋，增加暴雨和大雪产生几率。
In general, rising ocean temperatures endanger marine life and, ultimately, human livelihoods.
总的来说，海洋温度的上升会危及海洋生物，并最终危及人类生计。
Even if greenhouse gas emissions were stabilized tomorrow,
即使温室气体的排放明天就能稳定，
it would take decades to centuries for oceans to adjust to changes in the atmosphere and the climate that have already occurred.
海洋也需要几十年乃至几个世纪才能适应已经发生的大气和气候。
