Climate crisis increasing frequency of deadly ocean upswells, study finds

Intense swells of cold water from the depths are killing sharks, rays and other creatures, researchers say

A climate-disrupted ocean is pushing sharks, rays and other species to flee ever-hotter water in the tropics, only for them to be killed by increasingly intense upswells of cold water from the depths, a study has found.

One of the authors of the paper described the “eerie” aftermath of a mass die-off of more than 260 marine organisms from 81 species in a singular event of extreme cold upswelling off the coast of South Africa in 2021.