The Silica Balance in the World Ocean: A Reestimate

  title={The Silica Balance in the World Ocean: A Reestimate},
  author={Paul Tr�guer and David M. Nelson and Aleido J. Van Bennekom and David J DeMaster and Aude Leynaert and Bernard Qu�guiner},
  pages={375 - 379}
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 = 1012 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… 
Riverine contribution of biogenic silica to the oceanic silica budget
The results demonstrate that the contribution of biogenic silica carried in suspension by rivers is an important component in the world ocean Si budget that has not been recognized previously.
The world ocean silica cycle.
The resulting budget recognizes significantly higher input and output fluxes and notes that the recycling of silicon occurs mostly at the sediment-water interface and not during the sinking of silica particles through deep waters.
Silica and the cycle of carbon in the ocean
Revisiting the dissolution of biogenic Si in marine sediments: a key term in the ocean Si budget
  • P. Frings
  • Environmental Science
    Acta Geochimica
  • 2017
Of the ~240 × 1012 mol year−1 of biogenic silica (bSi) produced by diatoms and other silicifying organisms, only roughly 3%–4% escapes dissolution to be permanently buried. At the global scale, how,
Another continental pool in the terrestrial silicon cycle
It is shown that quartz that precipitates as siliceous cements forms a strongly 30Si-depleted reservoir with isotopic values down to -5.7‰, a more negative value than any previously published for terrestrial samples, suggesting that quartz re-precipitation plays an important role in the biogeochemical cycle of silicon.
Review on the Dissolution of Biogenic Silica and Its Controls in the Ocean
Silicon, which represents 27% of the lithosphere, plays an important role in marine ecosystem, and it makes the linkage with the global carbon cycle and climate change, through the biological pump of
Anthropogenic perturbations of the silicon cycle at the global scale: Key role of the land‐ocean transition
Silicon (Si), in the form of dissolved silicate (DSi), is a key nutrient in marine and continental ecosystems. DSi is taken up by organisms to produce structural elements (e.g., shells and
Alkaline‐extractable silicon from land to ocean: A challenge for biogenic silicon determination
The biogeochemical cycling of silicon (Si) along the land‐to‐ocean continuum is studied by a variety of research fields and for a variety of scientific reasons. However, there is an increasing need
Production and dissolution of biogenic silica in the ocean: Revised global estimates, comparison with regional data and relationship to biogenic sedimentation
We estimate the global rate of biogenic silica production in the ocean to be between 200 and 280 × 1012 mol Si yr−1. The upper limit is derived from information on the primary productivity of the
The accumulation and cycling of biogenic silica in the Southern Ocean: revisiting the marine silica budget


The diffusion of dissolved silica out of deep‐sea sediments
Cores of marine sediment from the Atlantic Ocean were maintained in seawater in the laboratory for 2 years and showed large sustained releases of dissolved silica to the overlying water. The release
Coastal eutrophication near the Mississippi river delta
CHANGES in delivery of river-borne nutrients such as dissolved phosphate, nitrate and silicate, owing to land-use changes and anthropogenic emissions, are known to result in eutrophication1— enhanced
Photosynthesis and fish production in the sea.
The two sets of variables primary production and the associated food chain dynamics may act additively to produce differences in fish production which are far more pronounced and dramatic than the observed variability of the individual causative factors.
Spring distributions of density, nutrients, and phytoplankton biomass in the ice edge zone of the Weddell‐Scotia Sea
We collected data on temperature, salinity, nutrient concentrations (nitrate, nitrite, phosphate, and silicic acid), and phytoplankton biomass (chlorophyll a, particulate carbon, nitrogen, and