https://www.sciencedaily.com/releases/2020/09/200901120734.htm
The project's results overturned the field's 130-year old assumption about seawater chemistry, revealing that the ratio of these ions varies considerably across the ocean.
Scientists have long used these ratios to reconstruct past ocean conditions, like temperature. "The main implication is that the paleo-reconstructions we have been conducting have to be revisited," Iglesias-Rodriguez explained, "because environmental conditions have a substantial impact on these ratios, which have been overlooked."
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