Glacial-interglacial CO2 change: The iron hypothesis

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Martin, J. H. (1990). Glacial-interglacial CO2 change: The iron hypothesis. Paleoceanography, 5(1), 1-13.
TitleGlacial-interglacial CO2 change: The iron hypothesis
AuthorsH. Martin
AbstractSeveral explanations for the 200 to 280 ppm glacial/interglacial change in atmospheric CO2 concentrations deal with variations in southern ocean phytoplankton productivity and the related use or nonuse of major plant nutrients. An hypothesis is presented herein in which arguments are made that new productivity in today's southern ocean (7.4 × 1013 g yr-1) is limited by iron deficiency, and hence the phytoplankton are unable to take advantage of the excess surface nitrate/phosphate that, if used, could result in total southern ocean new production of 2.3 × 1015 g C yr-1. As a consequence of Fe-limited new productivity, Holocene interglacial CO2 levels (preindustrial) are as high as they were during the last interglacial (~ 280 ppm). -from Author
Start page1
End page13
Subjectscarbon dioxide, glacial/interglacial change, Holocene, iron hypothesis, nitrate, nutrient, phosphate, phytoplankton, productivity
NoteCited By (since 1996):759