Abyssal upwelling in the Indian Ocean: Radiocarbon diagnostics

摘要

The GEOSECS Indian Ocean radiocarbon and carbonate chemistry data set are used to estimate the mean upwelling transport of bottom water in the Indian Ocean north of 30S. The study uses an "adjusted radiocarbon concentration" which is corrected for the effects of addition of particulate radiocarbon to the deep ocean. The cross-basin uniformity in the vertical gradients of "adjusted radiocarbon' allows quantification of vertical transfer processes using horizontally averaged concen- tration and fluxes.