The ocean is rich in diverse shades of blue and green. Now researchers find climate change will alter the color of the oceans by the end of the 21st century. The changes won’t be dramatic, in fact, they likely won’t be visible to the naked eye, but it suggests that the hue of the ocean could be an important marker for scientists watching to see how climate change will affect our seas.

“Ocean color will give us an earlier signal of climate change effects on the marine ecosystem than other