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World’s Oceans Changing Colour, Study Finds – Guardian

Global warming is thought to be making the world’s oceans greener by causing greater plankton growth in warmer tropical waters, a new study suggests

In October 2023, NASA said this world map from its Earth Data Ocean Color site shows how green chlorophyll or plankton is turning the world's oceans more green. Sea temperatures have risen in more than 90% of the world's oceans, according to the World Meteorological Organization.


The world’s oceans are getting greener, according to a report by The Guardian, which cited a study by British oceanographer BB Cael and colleagues that was published this week in Nature, which analysed 20 years of images from Nasa’s Modis-Aqua satellite, and found that “climate breakdown is probably to blame” because it may be causing warmer waters in low latitudes near the equator and boosting plankton populations.

“We do have changes in the colour that are significantly emerging in almost all of the ocean of the tropics or subtropics,” Cael was quoted as saying in the report, which said changes – a clear “greening effect” – had been detected over 56% of the world’s oceans – an area greater than all of the land on Earth – that suggested human activity was “likely affecting large parts of the global biosphere in a way that we haven’t been able to understand.”

Read the full report: The Guardian.




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Jim Pollard

Jim Pollard is an Australian journalist based in Thailand since 1999. He worked for News Ltd papers in Sydney, Perth, London and Melbourne before travelling through SE Asia in the late 90s. He was a senior editor at The Nation for 17+ years.


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