The oceans absorb 90% of the heat trapped by the carbon emissions from the burning of fossil fuels, making it the clearest indicator of global heating. Record levels of heat were taken up by the oceans in 2023, scientists said, and the data showed that for the past decade the oceans have been hotter every year than the year before. The heat also led to record levels of stratification in the oceans, where warm water ponding on the surface reduces the mixing with deeper waters. This cuts the amount of oxygen in the oceans, threatening marine life, and also reduces the amount of carbon dioxide and heat the seas can take up in the future.
The ocean is the key to telling us what's happening to the world and the data is painting a compelling picture of warming year after year after year, said Prof John Abraham, at the University of St Thomas in Minnesota, part of the team that produced the new data. We're already facing the consequences and they will get far worse if we don't take action, he said. But we can solve this problem today with wind, solar, hydro and energy conservation. Once people realise that, it's very empowering. We can usher in the new energy economy of the future, saving money and the environment at the same time.
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