The Mysterious X Factor Behind 2023's Unbelievable Heat

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Environment,Wallace Broecker,Samantha Burgess

Was this extra warming a blip, or a sign that climate change is veering off predictable tracks?

This story was originally published by Grist. Sign up for Grist’s weekly newsletter here. Predicting the future has always been a difficult, sometimes fruitless task, but scientists are surprisingly good at divining how hot the year ahead will be. For decades, their models have largely ended up matching global temperatures. Then 2023 came along. At the beginning of the year, climate scientists at four organizations — Berkeley Earth, NASA, the U.K.

3 degrees C compared to preindustrial times. But the last 12 months have been about 1.6 degrees C hotter, according to the latest data. Some of that heat — around 0.1 or 0.2 degree C — can be attributed to El Niño warming up the Pacific Ocean. That still leaves as much as 0.2 C unexplained. Scientists have a solid explanation for maybe 0.1 degree C of that extra heat: It could be a side effect of global efforts to reduce pollution.

 

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Is Climate Change Behind A Mysterious Algal Bloom In Patagonia?I'm an Australian science journalist based in Cali, Colombia covering STEM in The Global South. I'm the current Vice-President of the Colombian Association of Science Journalism (ACPC) and helped organize the 12th World Conference of Science Journalists, with 600+ attendees in Medellin, Colombia.
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