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Southern Ocean iron enrichment experiment: carbon cycling in high- and low-Si waters
journal contribution
posted on 2023-05-18, 11:11 authored by Coale, KH, Johnson, KS, Chavez, FP, Buesseler, KO, Barber, RT, Brzezinski, MA, Cochlan, WP, Millero, FJ, Falkowski, PG, Bauer, JE, Wanninkhof, RH, Kudela, RM, Altabet, MA, Hales, BE, Takahashi, T, Landry, MR, Bidigare, RR, Wang, X, Zanna ChaseZanna Chase, Peter StruttonPeter Strutton, Friederich, GE, Gorbunov, MY, Lance, VP, Hilting, AK, Hiscock, MR, Demarest, M, Hiscock, WT, Sullivan, KF, Tanner, SJ, Gordon, RM, Hunter, CN, Elrod, VA, Fitzwater, SE, Jones, JL, Tozzi, S, Koblizek, M, Roberts, AE, Herndon, J, Brewster, J, Ladizinsky, N, Smith, G, Cooper, D, Timothy, D, Brown, SL, Selph, KE, Sheridan, CC, Twining, BS, Johnson, ZIThe 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 ironenrichment 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.
History
Publication title
ScienceVolume
304Issue
5669Pagination
408-414ISSN
0036-8075Department/School
Institute for Marine and Antarctic StudiesPublisher
Amer Assoc Advancement SciencePlace of publication
1200 New York Ave, Nw, Washington, USA, Dc, 20005Rights statement
Copyright 2004 The American Association for the Advancement of ScienceRepository Status
- Restricted