A high resolution dissolved barium transect in the Southern Ocean

Stephanie Jacquet, Frank Dehairs, S. Rintoul

Research output: Contribution to journalArticle


The dissolved Barium (Ba d ) distribution in the whole
water column was examined along the WOCE SR3 line in the
Southern Ocean (Australian sector, late winter-spring 2001).
The high sampling resolution offered an excellent
opportunity to relate the Ba d distribution to frontal
structures and the water masses. Such a high resolution was
not achieved in previous Southern Ocean studies and showed
the tight overprinting of the frontal zones by Ba d gradients.
Hydrodynamic control on Ba d is evident in the case of
Antarctic Bottom Water formation, westward flow of Tasman
Sea waters and return flow of an eddy of the SubAntarctic
Front. However biogeochemical processes are also acting, as
witnessed by enhanced Ba d contents in deep waters of the
SubAntarctic Front zone and by a local mesopelagic
minimum in the Inter Polar Front Zone. These features are
respectively ascribed to the dissolution of Ba-rich phases and
Ba transfer from solution to particles. INDEX TERMS: 4805
Oceanography: Biological and Chemical: Biogeochemical cycles
(1615); 4808 Oceanography: Biological and Chemical: Chemical
tracers; 4825 Oceanography: Biological and Chemical:
Original languageEnglish
JournalGeophysical Research Letters
Publication statusPublished - 2004

Bibliographical note

Geophysical Research Letters, 31, N°14, L14301, 10.10129/2004GL020016


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