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Amorphous Silica Transport in the Ganges Basin: Implications for Si Delivery to the Oceans
Swedish Museum of Natural History, Department of Geology.ORCID iD: 0000-0002-1012-0642
2014 (English)In: Procedia Earth and Planetary Science, Vol. 10, no 0, 271-274 p.Article in journal (Refereed) Published
Abstract [en]

Rivers transport ∽6 x1012 mol yr-1 of dissolved Si (DSi) from the continents to the oceans. They also carry amorphous silica (ASi), solid phases likely to dissolve in seawater. Unfortunately, the magnitude of this flux is poorly constrained at a global scale. We present 92 new ASi values from suspended particulate matter (SPM) from the Ganges basin. Bulk SPM is ∽1.2% ASi, and mean ASi concentrations are ∽65 μM, of comparable magnitude to DSi concentrations. Our results also indicate a) ASi is not evenly distributed in the water column of large rivers, b) the ASi is not a wholly biogenic Si endmember and c) the ASi flux is, to a first order, a function of the SPM load. Our results suggest that the ASi particulate load is much greater than previously believed, rivaling that of the DSi load with important implications for the global Si cycle and oceanic Si isotopic budget.

Place, publisher, year, edition, pages
2014. Vol. 10, no 0, 271-274 p.
Keyword [en]
global silicon cycle, river amorphous silica, silicon isotopes, river fluxes
National Category
Geosciences, Multidisciplinary
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-2370OAI: oai:DiVA.org:nrm-2370DiVA: diva2:1089078
Available from: 2017-04-18 Created: 2017-04-18 Last updated: 2017-04-18Bibliographically approved

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http://www.sciencedirect.com/science/article/pii/S1878522014001210

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Frings, Patrick J
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
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  • Other locale
More languages
Output format
  • html
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  • asciidoc
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