Results from the GEOTRACES cruise section GIPY11

An interesting comparison of data of dissolved barium (Ba) and data of dissolved aluminium (Al) and silicate (Si) collected onboard the GEOTRACES cruise GIPY11 (ARK-XXII/2 Polarstern expedition) is presented in the article of Roeske and colleagues (Roeske et al, 2012). This comparison is used to distinguish between signals produced by the regeneration of sinking particles and signals derived from entrainment of shelf waters, adding to the analysis of Al and Si data of the same cruise by Middag et al. (2009). The two papers investigate whether the relationships between Ba, Si and Al differ between water masses and between the various deep Arctic Basins, and whether these differences can help us to infer deep water circulation and shelf water inputs.

Roeske_2012

Figure: Distribution of Ba on section C, which reaches from the Kara Sea at 81.25°N to the Alpha Ridge at 84.5°N. Isolines are at 2 nM intervals. Source:  Marine Chemistry.

 

References:

Middag, R., de Baar, H.J.W., Laan, P., Bakker, K., (2009). Dissolved aluminium and the silicon cycle in the Arctic Ocean. Marine Chemistry 115, 176-195

Roeske T., Rutgers vd Loeff M., Middag R, Bakker K. (2012), Deep water circulation and composition in the Arctic Ocean by dissolved barium, aluminium and silicate, Marine Chemistry 132-133, (56-67).

Latest highlights

Science Highlights

Specific features characterize the dissolved iron distribution in the North Western Indian Ocean

Venkatesh Chinni and Sunil Kumar Singh propose dissolved iron profiles along two meridional transects realized during spring and fall seasons between the Arabian Sea and the sub-tropical western Indian Ocean…

07.01.2022

Science Highlights

Anthropogenic aerosol has become a dominant source of zinc in the deep water of the Northern South China Sea

Liao and colleagues determined zinc concentrations and isotope compositions in sinking particles collected in the Northern South China Sea…

24.11.2021

Science Highlights

An updated global ocean chromium biogeochemical cycle

Janssen and co-authors present an exhaustive compilation of ocean chromium data…

Science Highlights

Mercury stable isotopes constrain atmospheric pathways to the ocean

The study’s results hold promise that the implementation of anti-pollution measures under the Minamata Convention will likely result in a faster decrease of oceanic mercury levels than previously thought.

18.11.2021

Rechercher