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.

 

Reference:

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

Science Highlights

Tracing dust deposition with aluminium and silicate at a resolution never reached before

Benaltabet and his colleagues propose a study of the dissolved aluminium and silicate fate in the Gulf of Aqaba (Red Sea).

24.01.2023

Science Highlights

Actinium-227 distribution traces at least three processes in the North Atlantic Ocean

Le Roy and colleagues report an oceanic section of Actinium-227 in the North Atlantic Ocean.

23.01.2023

Science Highlights

Do you want to know more about iron and its isotopes? This review is for you!

Authors present a comprehensive review of iron and iron isotope sources, internal cycling, and sinks in the ocean.

17.01.2023

Science Highlights

Different fates of four poorly soluble trace elements in the Pacific Ocean

Zheng and co-authors present the full-depth distributions of aluminum, lead, manganese and copper in the western South Pacific.

24.11.2022

Rechercher