The Caribbean Sea bordering Grand Cayman’s Seven Mile Beach is a startling aquamarine color. Over 1,500 miles away, the Atlantic Ocean next to Coney Island is a dark bluish-green. And Bondi blue, the color of the original iMac computer, was named after the teal hue of the Tasman Sea off the coast of the eponymous Sydney beach.
Pollution isn’t to blame for these stark differences. As light bounces off and passes through water, it reflects the color blue back to our eyes, but microscopic algae and tiny sediments known as colored dissolved organic matter muddy the metaphorical waters and cause oceans to appear green, red, or brown.
Now, scientists are trying to use these microscopic sediments to help them better predict climate change.
Science journalist Madeline Bender explains in this post via Massive Science.
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