Neodymium is one of those elements who's budget in the ocean is off (unbalanced), also, we don't know where all the Nd is coming from. This study shows that the dissolution of iron-manganese (Fe-Mn) oxyhydroxides in resuspended sediments and dissoltuion in pore water are an important source. 🧪🌊
Lewright et al provide a prediction of relative sea level change by the end of the 21st century for Greenland. Due to glacial isostatic adjustment effects, most of Greenland will experience a sea level fall of over 1 m by the end of the century. www.nature.com/articles/s41...
We have a new preprint, led by @petrash.bsky.social, using wicked electrochemistry and really nifty microscopy to look at how manganese redox cycling and carboxyl groups play into the formation of protodolomite. 🧪⚒️
eartharxiv.org/repository/v...
Using planktic foraminiferal Mn/Ca, I/Ca, and foraminifera‑bound δ15N, we tracked oxygen levels across the Arabian Sea to distinguish between hypoxia and true oxygen deficiency with denitrification. This is the first quantitative study of Miocene oxygenation in the Arabian Sea.
Our results show that global warming can increase oxygen levels, but the effects of regional processes (like monsoon strength, surface stratification, and marginal-sea outflows) may be substantial, an important consideration for predicting
the future of ocean oxygenation in the Arabian Sea.
Understanding Greenland's response to climate change is critical, and depends on Greenland's sovereignty and inclusion in NATO
Our earlier work in the Pacific showed that it too was better oxygenated during the warm Miocene, but comparison of these datasets reveals the amount of dissolved oxygen was different. The Pacific was fully oxic (>90 umol/kg) while the Arabian Sea was hypoxic (5-90 umol/kg).