A new study has found that the oceans have warmed so quickly that they will not cool down again. Oceans cover 70% of the globe and absorb 90% of the excess carbon. The ocean had reached a point of no return on heating. There will be consequences.
Scientists analysed sea surface temperatures over the last 150 years, which have risen because of global heating. They found that extreme temperatures occurring just 2% of the time a century ago have occurred at least 50% of the time across the global ocean since 2014.
In some hotspots, extreme temperatures occur 90% of the time, severely affecting wildlife. More than 90% of the heat trapped by greenhouse gases is absorbed by the ocean, which plays a critical role in maintaining a stable climate.
“By using this measure of extremes, we’ve shown that climate change is not something that is uncertain and may happen in the distant future – it’s something that is a historical fact and has occurred already,” said Kyle Van Houtan, at the Monterey Bay Aquarium, US, and one of the research team. “Extreme climate change is here, it’s in the ocean, and the ocean underpins all life on Earth.”
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The proportion of the ocean experiencing extreme heat in some large ecosystems is now 80%-90%, with the five worst affected including areas off the north-east coasts of the US and Canada, off Somalia and Indonesia, and in the Norwegian Sea.
I’m sorry.