Significant role of dissolved/particulate neodymium from the Ganga–Brahmaputra river system and Bay of Bengale margin in contributing to the dissolved Nd budget of the global oceans.

Data on dissolved Nd concentrations and isotopic compositions measured along a 87 E transect (GI01 section, “Indian GEOTRACES”) have been used in an inverse model in order to identify the respective effects of water mass mixing and Nd release from particulate matter in balancing this tracer budget in the Bay of Bengal. Results clearly underline that release from particulate phases supplied by the Ganga–Brahmaputra river system is required to explain both the distribution and budget of the Nd parameters. Calculations also evidence that supply of Nd from continental margin sediments is occurring at places identified at places identified as “hotspots of Nd release”.

sunil_figure_l

Click on the image to view it larger.

Reference:

Satinder Pal Singh, Sunil Kumar Singh, Vineet Goswami, Ravi Bhushan, Vinai Kumar Rai (2012), Spatial distribution of dissolved neodymium and εNd in the Bay of Bengal: Role of particulate matter and mixing of water masses: Geochimica et Cosmochimica Acta, ELSEVIER (94) p. 38-56, DOI : 10.1016/j.gca.2012.07.017.

Latest highlights

Science Highlights

Loss of old Arctic sea ice increases methylmercury concentrations

Researchers from the SCRIPPS, the Stockholm Natural Museum and the Mediterranean Institute of Oceanography show the importance of sea ice composition on methylmercury budgets

02.09.2020

Science Highlights

Estimating Atmospheric Trace Element Deposition Over the Global Ocean

A recently developed method based on the natural radionuclide Be-7 has provided a means to estimate the bulk atmospheric trace element deposition velocity

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

Rechercher