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| Why does atmospheric CO2 rise |
 | | Taken together, the ocean and the terrestrial vegetation and soils must currently be a net sink of CO2 rather than a source [Melillo, p 454] [Schimel 94, p 47, 55] [Schimel 95, p 79] [Siegenthaler]. |
 | | The trends are not compatible with a dominant CO2 source in the terrestrial biosphere or in the ocean. |
 | | CO2 fertilization, N fertilization, northern forest regrowth, and climatic effects are hard to separate, their relative roles are not well known [Goulden] [Melillo, p 449, 451-57] [Schimel 95, p 78-82]. |
| www.radix.net /~bobg/faqs/scq.CO2rise.html (2513 words) |
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