A new model of the oceanic aluminium distribution

Taking into account most of the parameters that govern any trace element’s oceanic behaviour is a challenge, given their number and complexity.

Marco van Hulten and co-workers (2014, see reference below) propose here the most complete model ever written for the oceanic aluminium (Al) distribution. In addition to atmospheric input -which was the only term constraining the Al distribution in a preceding model, see van Hulten et al., 2013-, circulation, sediment re-suspension and biological incorporation by diatoms are considered in this new scheme.

These new sources and sinks are significantly improving the simulated distribution, more specifically a sediment source of Al in the bottom waters of the Northern Atlantic and the velocity fields.

14 vanHulten low

Figure: The dissolved aluminium concentration (nM) of a global model simulation of aluminium. The circles are the observations. The sources in the model comprise the release of Al from dust and from resuspended deep-ocean sediments, the latter depending on the bottom Si concentration. Al is removed by reversible scavenging by biogenic silica. (This figure may be reused, changed and redistributed according to Creative Commons BY-SA. Click here to view the figure larger.)

 

References:

Van Hulten, M. M. P., Sterl, A., Tagliabue, A., Dutay, J.-C., Gehlen, M., de Baar, H. J. W., & Middag, R. (2013). Aluminium in an ocean general circulation model compared with the West Atlantic GEOTRACES cruises. Journal of Marine Systems, 126, 3–23. doi: 10.1016/j.jmarsys.2012.05.005 Click here to access the paper.

Van Hulten, M. M. P., Sterl, A., Middag, R., de Baar, H. J. W., Gehlen, M., Dutay, J.-C., & Tagliabue, A. (2014). On the effects of circulation, sediment resuspension and biological incorporation by diatoms in an ocean model of aluminium. Biogeosciences, 11(14), 3757–3779. doi:10.5194/bg-11-3757-2014 Click here to acces the paper.

Latest highlights

Science Highlights

Dissolved gallium unravels Pacific and Atlantic waters in the Arctic Ocean

Whitmore and co-workers demonstrate that the dissolved gallium distribution provide a better water source deconvolution than the nutrient tracers

22.07.2020

Science Highlights

Precise estimate of the mercury export from the Arctic to the Atlantic Ocean

Using new observations acquired during GEOTRACES Arctic cruises, a refined arctic mercury budget has been established

21.07.2020

Science Highlights

Rare Earth Elements and neodymium isotopes as tracers in the Mediterranean Sea

Garcia-Solsona and co-workers analysed 9 seawater stations around the central Mediterranean Sea…

02.07.2020

Science Highlights

A new model simulates the speciation and dispersion of hydrothermal iron

Roshan and collaborators present new observations of dissolved iron and its physical speciation in the South Pacific

10.06.2020

Rechercher