1. Christine Gammans Andrew McCauley
Oceanic Silica
Christine Gammans
Andrew McCauley

2. <http://media-2. web. britannica. com/eb-media/68/6568-004-D17E7FAC
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3. Inputs and Outputs Inputs Tmol/year of Silicon River Influx 5.0 ± 1.1
Eolian
0.5 ± 0.5
Sealfloor Weathering
0.4 ± 0.3
Hydrothermal Inputs
0.2 ± 0.1
Total
6.1 ± 2.0
Outputs
Tmol/ year Silicon
Coastal Deposition
1.2 ± 0.7
Deep Oceanic Deposition
5.9 ± 1.1
Total
7.1 ± 1.8

4. ~400 years for surface waters
Residence Time
~400 years for surface waters
~15,000 years as a whole ocean
Reservoir Volume
2.8 x 1015 kg
Si flux in Tmol/year. (Treguer et al. 1995, fig. 1)

5. Concentrations of silicic acid across the world’s oceans, measured in μM. (Ragueneau et al. 2000, fig. 6)