Decoupling between dissolved zinc and silicon in the North Atlantic Ocean driven by mixing of end-members

Roshan and Wu (2015, see reference below) reveal that the correlation between dissolved zinc (Zn) and silicon (Si) is relatively weak in the North Atlantic Ocean (GA03 US section). They use the results of an Optimum Multi-Parameter Water Mass Analysis to establish which parameter is mainly controlling the Zn distribution. Surprisingly, they present evidence that remineralization might have an insignificant effect on the zinc distribution in this region. They conclude that dissolved zinc in the North Atlantic Ocean is mainly controlled by water mass mixing, although some water mass end-members exhibit deviations in the Zn-Si correlation, as for example the Mediterranean Outflow Waters. Unexpected large Zn inputs of hydrothermal origin are also perturbing the game…

15 Roshan

Figure: Top panel shows the distribution of dissolved Zn along the GA03. Bottom panel shows the Zn-Si relationship for the zonal (left) and meridional (right) transect. Disappearance of a linear correlation is evident, particularly for the meridional transect where the Mediterranean waters have a great influence. Click here to view the figure larger.

Reference:

Roshan, S., & Wu, J. (2015). Water mass mixing: The dominant control on the zinc distribution in the North Atlantic Ocean. Global Biogeochemical Cycles, 29(7), 1060–1074. doi:10.1002/2014GB005026

Latest highlights

Science Highlights

Trace metal quotas in small flagellates: diatoms are challenged!

Sofen and colleagues found that in natural plankton assemblages and in culture, small flagellates operated at the lower range of iron quotas.

14.09.2022

Science Highlights

A vivid picture of particle distribution and sources in the Arctic Ocean

Extensive description of particle concentrations and chlorophyll-a fluorescence distribution along Arctic GEOTRACES sections.

08.09.2022

Science Highlights

The Tonga arc, an iron boundary in the South West Pacific Ocean

As part of the TONGA GEOTRACES process study, Tilliette and colleagues identified high dissolved iron concentrations in the west of the Tonga arc.

31.08.2022

Science Highlights

Dominance of the benthic flux of rare earth elements on continental shelves

Deng and his colleagues focus on one of the largest land–ocean interfaces in Asia, the Changjiang River–East China Sea system.

30.08.2022

Rechercher