Kiel,

Winckler, Gisela; et al. (2016): Ocean dynamics, not dust, have controlled equatorial Pacific productivity over the past 500,000 years

Winckler, Gisela; Anderson, Robert F.; Jaccard, Samuel L.; Marcantonio, Franco (2016): Ocean dynamics, not dust, have controlled equatorial Pacific productivity over the past 500,000 years. In Proc Natl Acad Sci USA, p. 201600616–201600616. DOI 10.1073/pnas.1600616113.

On effectivity of ocean iron fertilization. "Throughout most of the equatorial Pacific, upwelling of water from the Equatorial Undercurrent supplies far more dissolved iron than is delivered by dust, by as much as two orders of magnitude. Nevertheless, recent studies have inferred that the greater supply of dust during ice ages stimulated greater utilization of nutrients within the region of upwelling on the equator, thereby contributing to the sequestration of carbon in the ocean interior. Here we present proxy records for dust and for biological productivity over the past 500 ky at three sites spanning the breadth of the equatorial Pacific Ocean to test the dust fertilization hypothesis."

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