Sea surface temperatures have been skyrocketing beyond expectations. That may be a bad sign for hurricane season—and the health of ocean ecosystems.
For nearly a year now, a bizarre heating event has been unfolding across the world’s oceans. In March 2023, global sea surface temperatures started shattering record daily highs, and have stayed that way since. You can see 2023 in the orange line below, the other gray lines being previous years. That solid black line is where we are so far in 2024—way, way above even 2023.
But now the umbrella has partially folded up, allowing more of the sun to beat down on the ocean. Weirder still, another contributing factor to ocean warming might be the 2020 regulations that drastically reduced the amount of sulfur allowed in shipping fuels. “Basically overnight, it cut this aerosol pollution by about 75, 80 percent,” says Robert Rohde, lead scientist at Berkeley Earth, a nonprofit that gathers climate data. “That was a good thing for human health—the air pollution was toxic.
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