A new study reveals that the rate of ocean warming has more than quadrupled in the last four decades, rising from 0.06 degrees Celsius per decade in the late 1980s to 0.27 degrees Celsius per decade currently. This accelerated warming, driven by Earth's growing energy imbalance due to increased greenhouse gas concentrations and reduced sunlight reflection, has led to record-breaking ocean temperatures. Scientists warn that this trend, if unmitigated, could further exacerbate global warming and its consequences.
The rate of ocean warming has more than quadrupled over the past four decades, a new study has shown. Ocean temperatures were rising at about 0.06 degrees Celsius per decade in the late 1980s, but are now increasing at 0.
27 degrees Celsius per decade.Professor Chris Merchant, lead author at the University of Reading, said:"If the oceans were a bathtub of water, then in the 1980s, the hot tap was running slowly, warming up the water by just a fraction of a degree each decade. But now the hot tap is running much faster, and the warming has picked up speed. The way to slow down that warming is to start closing off the hot tap, by cutting global carbon emissions and moving towards net-zero."This accelerating ocean warming is driven by the Earth's growing energy imbalance -- whereby more energy from the Sun is being absorbed in the Earth system than is escaping back to space. This imbalance has roughly doubled since 2010, in part due to increasing greenhouse gas concentrations, and because the Earth is now reflecting less sunlight to space than before. Global ocean temperatures hit record highs for 450 days straight in 2023 and early 2024. Some of this warmth came from El Niño, a natural warming event in the Pacific. When scientists compared it to a similar El Niño in 2015-16, they found that the rest of the record warmth is explained by the sea surface warming up faster in the past 10 years than in earlier decades. 44% of the record warmth was attributable to the oceans absorbing heat at an accelerating rate.The findings show that the overall rate of global ocean warming observed over recent decades is not an accurate guide to what happens next: it is plausible that the ocean temperature increase seen over the past 40 years will be exceeded in just the next 20 years. Because the surface oceans set the pace for global warming, this matters for the climate as a whole. This accelerating warming underscores the urgency of reducing fossil fuel burning to prevent even more rapid temperature increases in the future and to begin to stabilise the climate.Unprecedented wildfires in Canada and parts of Amazonia last year were at least three times more likely due to climate change and contributed to high levels of CO2 emissions from burning globally, ... July 22, 2024, was the hottest day on record, according to a NASA analysis of global daily temperature data. July 21 and 23 of this year also exceeded the previous daily record, set in July 2023. ... As climate change causes ocean temperatures to rise, one of Greenland's previously most stable glaciers is now retreating at an unprecedented rate, according to a new ...
CLIMATE CHANGE OCEAN WARMING GREENHOUSE GASES GLOBAL TEMPERATURES EMISSIONS
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