iron fertilization wont work in much of pacific, says study /

Over the past half-million years,the equatorial Pacific Ocean has seen five spikes in the amount of iron-laden dust blown in from the continents. In theory, those bursts should maintain turbo-charged the growth of the ocean's carbon-capturing algae - algae need iron to grow - but a new study shows that the excess iron had exiguous to no effect.

Source: phys.org