234Th deficit and excess in the Southern Ocean during spring 2001: Particle export and remineralization
Article first published online: 16 JUN 2004
Copyright 2004 by the American Geophysical Union.
Geophysical Research Letters
Volume 31, Issue 12, June 2004
How to Cite
2004), 234Th deficit and excess in the Southern Ocean during spring 2001: Particle export and remineralization, Geophys. Res. Lett., 31, L12301, doi:10.1029/2004GL019744., , , and (
- Issue published online: 16 JUN 2004
- Article first published online: 16 JUN 2004
- Manuscript Accepted: 18 MAY 2004
- Manuscript Received: 17 FEB 2004
 234Th deficit and excess were examined in the upper 500 m of the Southern Ocean from Sub-Antarctic to Seasonal Ice Zones (Australian sector) during austral spring 2001. 234Th fluxes at 100 m indicate that particle export was low in the North (46.9–51.0°S), minimal in the Polar and Inter-Polar Frontal Zones and high in the South (≥61°S). These results are in tight agreement with new production estimates from the same cruise. Our data indicate that Polar and Inter-Polar Frontal Zones were not zones of intense export in the Australian sector at this time of year, in contrast with other sectors of the Southern Ocean. Also, we highlight the usefulness of 234Th excess below the mixed layer as a tool to study mesopelagic remineralization.