Are deep blue seas fading? Oceans turn to new hue across parts of Earth, study finds


A large swath of Earth’s oceans changed color over the past 20 years — and human activity is suspected to have caused it, a new study reports.

That deep blue color depicted so richly in postcards is disappearing, particularly in the tropics.

“On the whole, low-latitude oceans have become greener in the past 20 years,” according to the report published in

The discovery has confirmed what study coauthor Stephanie Dutkiewicz has long feared.