Nice coupling between radium-228 and neodymium parameter distribution in oceanic surface waters

Using Radium-228 (228Ra) activity as an indicator of coastal water mass influence and a compilation of Neodymium (Nd) parameters in the first 100 m, Chen and co-authors propose that more stratified regions are generally associated with low surface Nd concentrations and that lateral mixing of Nd from coastal surface current is not the only mechanism determining the basin scale variations of surface water Nd concentrations. Their strong hypothesis is that upper ocean vertical supply may be an as yet neglected primary factor in controling this distribution. Consequently, the estimated required input flux of Nd to the surface layer to maintain the observed concentrations could be nearly two orders of magnitudes larger than riverine/dust flux, and also larger than the model-based estimation on shelf-derived coastal flux.



Chen, T.-Y., J. Rempfer, M. Frank, R. Stumpf, and M. Molina-Kescher (2013), Upper ocean vertical supply: A neglected primary factor controlling the distribution of neodymium concentrations of open ocean surface waters?, J. Geophys. Res. Oceans, 118, 3887–3894, DOI:10.1002/jgrc.20288.

Latest highlights

Lead isotopes allow tracing the processes injecting of anthropogenic lead in deep waters

This work follows the penetration of anthropogenic lead (traced using its isotopic signatures) into the pristine deep Pacific Ocean.

Challenging results on iron bioavailability in the Southern Ocean

Fourquez and co-authors conducted dissolved iron uptake experiments with Phaeocystis antarctica…

Protactinium-231 budget of the Atlantic sector of Southern Ocean

Levier and colleagues analysed dissolved and particulate protactinium-231 in samples collected in a section in the Southern Ocean…

Using machine learning to accurately simulate the oceanic barium distribution

Mete and colleagues used machine learning to predict the global distribution of oceanic barium…