Ice chunks drifting in the Bothnia Gulf near the shore at the beginning of the spring | Olivier Morin

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Daniel Swain for ABC News — Highest ocean temperatures ever recorded for the month of May, NOAA says

“Four main factors are contributing to such historic warming of global sea surface temperatures: human-induced climate change, a developing El Nino event, effects from the 2022 Hunga Tonga-Hunga Ha’apai volcano eruption and a new shipping emissions policy aimed at reducing air pollution, said Daniel Swain, a climate scientist at the University of California, Los Angeles.”