"Seawater composition in the open ocean is well-studied, yet this research finds larger variability than expected, which questions many other results based on the assumption of constant seawater composition."

Check out this article that introducing Professor Debora Iglesias-Rodriguez and her colleagues' research on seawater composition! https://www.news.ucsb.edu/2020/020006/revisiting-ratios

Journal Article: https://www.pnas.org/content/117/36/22281