11.sea changes

文中出现了两个双关语pun

一个是题目里的sea changes既指字面意思海洋变化，又指very big change.

第二个是troubled waters这个可以字面理解为有麻烦的海洋，又特指a difficult situation.

文章开篇用几个比较级直述海洋巨变：warmer, stormier,more acidic, less productice 然后摆出Intergovernmental Panel on Climate Change (IPCC)的报告数据。

The world’s oceans are getting warmer, stormier and more acidic. They are becoming less productive as the ecosystems within them collapse.

随后作者提到海洋在全球变暖中的积极作用，以及海洋变化对此带来的影响。

For decades, the oceans have provided a buffer against the full impact of a warming planet.

As oceans warm, the layers of water within them mix less and the supply of oxygen and nutrients decreases.

IPCC的报告，可能不会有太直接的意义，

The IPCC process is rooted in science but reaching any consensus is tricky.

其积极性可能在于

Even so, this latest report provides a new, unified portrait of Earth’s oceans and ice realms that should better inform policymakers. And better informed could mean better protected.

先知道，再做到。应对海洋变化，路漫漫其修远兮……

11.sea changes