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q |
Carbon was exported from surface oceans to the deep ocean during
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glaciations by higher rates of photosynthesis and biological
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productivity.
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q |
Photosynthesis and organic productivity occur in the surface ocean
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because of sunlight and nutrients.
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q |
Photosynthesis extracts CO2 from surface waters and incorporates it
in
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organic tissue (CH2O), some of which sinks to the deep ocean.
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