[en] The element thorium has multiple isotopes that have emerged collectively as a powerful set of tracers for particle associated processes in the oceans. The production of 2^34Th from 2^38U, coupled with the conservative behavior of 2^38U in seawater, makes the source of 2^34Th easy to characterize. Because of its very particle reactive behavior, 2^34Th is removed from a parcel of water in only two ways, through decay and through particle flux. Therefore, a steady-state 1D activity balance can be used to calculate its flux. This work presents results of a collaborative research on organic carbon fluxes distribution in the Bransfield Strait. Macro-nutrients, micro nutrients and chlorophyll-a distributions were used to examine the pathway sources. 2^34Th was used as a tracer of organic carbon fluxes distribution in the Bransfield Strait in order to evaluate its influence in the CO₂ drawdown, since POC export via sinking particles is the primary mechanism of carbon sequestration in the Southern Ocean. Fluxes up to 15274 dmp m-2 d-1 were estimated, the highest value observed in Station 09 at 794 m depth. POC exported fluxes derived from the disequilibrium 2^34Th/ 2^38U model varied from 0.6 to 16000 mmol C m^-2 d^-1. (author)