Southern ocean iron enrichment experiment: Carbon cycling in high- and low-Si waters

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
2004
Editor: 
Journal Title: 
Science
Journal Date: 
Apr 16
Place Published: 
Tertiary Title: 
Volume: 
304
Issue: 
5669
Pages: 
408-414
Section / Start page: 
Publisher: 
ISBN Number: 
0036-8075
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:000220845400039
LDEO Publication Number: 
Call Number: 
Abstract: 

The availability of iron is known to exert a controlling influence on biological productivity in surface waters over large areas of the ocean and may have been an important factor in the variation of the concentration of atmospheric carbon dioxide over glacial cycles. The effect of iron in the Southern Ocean is particularly important because of its large area and abundant nitrate, yet iron-enhanced growth of phytoplankton may be differentially expressed between waters with high silicic acid in the south and low silicic acid in the north, where diatom growth may be limited by both silicic acid and iron. Twomesoscaleexperiments, designed to investigate the effects of iron enrichment in regions with high and low concentrations of silicic acid, were performed in the Southern Ocean. These experiments demonstrate iron's pivotal role in controlling carbon uptake and regulating atmospheric partial pressure of carbon dioxide.

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