https://phys.org/news/2023-08-deep-blue-seas-oceans-hue.html Phys.org Topics * Week's top * Latest news * Unread news * Subscribe [ ] Science X Account [ ] [ ] [*] Remember me Sign In Click here to sign in with or Forget Password? Not a member? Sign up Learn more * Nanotechnology * Physics * Earth * Astronomy & Space * Chemistry * Biology * Other Sciences * Medical Xpress Medicine * Tech Xplore Technology [INS::INS] * * share this! * 297 * Twit * Share * Email 1. Home 2. Earth 3. Environment * * * --------------------------------------------------------------------- September 2, 2023 Editors' notes This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: fact-checked peer-reviewed publication reputable news agency proofread Are deep blue seas fading? Oceans turn to new hue across parts of Earth, study finds by Mark Price, The Charlotte Observer blue sea Credit: Pixabay/CC0 Public Domain 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 Nature. The discovery has confirmed what study co-author Stephanie Dutkiewicz has long feared. "I've been running simulations that have been telling me for years that these changes in ocean color are going to happen," she said in a news release from the Massachusetts Institute of Technology. "To actually see it happening for real is not surprising, but frightening. And these changes are consistent with man-induced changes to our climate." The color shift was discovered as researchers poured over two decades' worth of satellite data. They eventually concluded 56% of ocean's surface was greener than it was before the turn of the century. The shift in color will impact "marine food webs," the team concluded. However, the report did not specify a broader impact on humans. Climate change may be driving the shift, scientists suspect. However, the trend does not appear to be associated with rising sea surface temperatures, the study concluded. "We don't know what is causing the trend. It could be dissolved organic material, changes in the type and quantity of phytoplankton...all these aspects can affect ocean color," study co-author Emmanuel Boss told EOS Science News. "We're hoping more colleagues will try and find what has been causing these changes." More information: B. B. Cael et al, Global climate-change trends detected in indicators of ocean ecology, Nature (2023). DOI: 10.1038/ s41586-023-06321-z Journal information: Nature 2023 The Charlotte Observer. Distributed by Tribune Content Agency, LLC. Citation: Are deep blue seas fading? Oceans turn to new hue across parts of Earth, study finds (2023, September 2) retrieved 3 September 2023 from https://phys.org/news/ 2023-08-deep-blue-seas-oceans-hue.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. 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