Sediment trap, nephelometer, and particulate matter (PM) data were collected in the vicinity of the Subtropical Convergence, north of Chatham Rise (42-43”S), southwest Pacific Ocean, in austral autumn 1992. Free-floating cylindrical sediment traps were deployed below the euphotic zone at 200-, 300-, and 500-m water depths. Increases in total mass flux and concomitant proportional decreases in o...