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The Silica Balance in the World Ocean: A Reestimate
Abstract
The net inputs of silicic acid (dissolved silica) to the world ocean have been revised to 6.1 ± 2.0 teramoles of silicon per year (1 teramole = 10 12 moles). The major contribution (about 80 percent) comes from rivers, whose world average silicic acid concentration is 150 micromolar. These inputs are reasonably balanced by the net ouputs of biogenic silica of 7.1 ± 1.8 teramoles of silicon per year in modern marine sediments. The gross production of biogenic silica (the transformation of dissolved silicate to particulate skeletal material) in surface waters was estimated to be 240 ± 40 teramoles of silicon per year, and the preservation ratio (opal accumulation in sediment/gross production in surface waters) averages 3 percent. In the world ocean the residence time of silicon, relative to total biological uptake in surface waters, is about 400 years.
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Citations
Cited by
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The life of diatoms in the world's oceans
Armbrust, E. V. (2009) · Nature · doi:10.1038/nature08057 · Cited by 1,068
Global river nutrient export: A scenario analysis of past and future trends
Seitzinger, S. P., Mayorga, E., Bouwman, A. F., Kroeze, C., Beusen, A. H. W., Billen, G., Van Drecht, G., Dumont, E., Fekete, B. M., Garnier, J., et al. (2010) · Global Biogeochemical Cycles · doi:10.1029/2009gb003587 · Cited by 894
Hartmann, J., West, A. J., Renforth, P., Köhler, P., De La Rocha, C. L., Wolf‐Gladrow, D. A., Dürr, H. H., & Scheffran, J. (2013) · Reviews of Geophysics · doi:10.1002/rog.20004 · Cited by 717
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Metadata
- Authors
- Tréguer, P., Nelson, D. M., Van Bennekom, A. J., DeMaster, D. J., Leynaert, A., & Quéguiner, B.
- Venue
- Science
- Published
- 1995-04-21
- Volume
- 268
- Issue
- 5209
- Pages
- 375-379
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2041885277
- Cited by
- 1,484
- References
- 0
- FWCI
- 15.86
- Type
- journal article
- Language
- en
- Open access
- closed
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- Tréguer, P., Nelson, D. M., Van Bennekom, A. J., DeMaster, D. J., Leynaert, A., & Quéguiner, B. (1995). The Silica Balance in the World Ocean: A Reestimate. Science. https://doi.org/10.1126/science.268.5209.375
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
