Galapagos coral archives indicate climate change amplifies El Niño strength
Scientists used uranium-thorium dating and chemical analysis of coral skeletons from the Galapagos to reconstruct Pacific sea surface temperatures over a millennium. They found that variability in the El Niño-Southern Oscillation has risen by 36.5% in the last four decades relative to pre-industrial levels, largely due to more powerful El Niño events. This indicates that global warming is amplifying the strength of El Niños.
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The team used uranium-thorium dating to establish coral ages, then analyzed skeletal chemistry to reconstruct
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