[MIS14-P11] Lithogenic fluxes across a transect in the SW Indian Ocean since the last glacial inception
Keywords:Southern Ocean, Biological Pump
The effect of iron fertilization on biological productivity has previously been documented in the Atlantic and Pacific sectors of the Southern Ocean [2, 3]. During glacial periods higher input of Fe-bearing dust increased phytoplankton growth and carbon sequestration, thus leading to the drawdown of atmospheric CO2, accounting for about half of the glacial-interglacial CO2 amplitude .
Here we present 230Th-normalized lithogenic fluxes in a set of marine sediment cores spanning a meridional transect in the Indian sector of the Southern Ocean further away from the Patagonian dust plume and show that increased Fe flux impacted export production patterns, contributing to the sequestration of carbon away from the atmosphere.
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