Cleaner shipping fuel is contributing to ocean warming, scientists say

SINGAPORE - Shipping fuel regulations introduced in 2020 have led to a substantial cut in sulphur dioxide pollution, but may also have made the ocean warmer by reducing cloud cover, according to a modelling study in a paper published late on Thursday.

IMO fuel standards could have been responsible for 80% of the planet's total net heat uptake since 2020, with the impact particularly pronounced in busy shipping lanes, the researchers estimated in the paper published by the Communications Earth & Environment journal. "This cooling effect is well understood - and documented episodes have occurred as consequences of several major volcanic eruptions emitting SO2 during the past 2,000 years," said Stuart Haszeldine, director of the Edinburgh Climate Change Institute at the University of Edinburgh.

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