Increasing stratification and atmospheric iron inputs will likely continue in the coming decades , but the decline in phosphate-to-nitrate availability is still subject to change. A declining phosphate supply would eventually start to limit nitrogen fixation rather than iron . and WOD for conglomerating and managing these cruise data sets. We thank Jennifer Martiny and François Primeau for their helpful suggestions on our initial manuscript. We thank Eun Young Kwon and Mohanan Sreeush for their assistance in providing their CESM2 nutrient uptake experiments. We acknowledge that we referred to ChatGPT 3.5 for suggesting code in data analysis and edits in the manuscript text.