I recall an earlier thread (page 11) about a drier Amazon "growing" more. As the grasses replace the forest, they'll increase NPP (grassland NPP > jungle NPP) as well as dry out the area (also increasing NPP).

Sounds good, but a drier Amazon won't be good in the long run.

What strikes me is that even with the terrestrial NPP increasing (~1/2 GtC/yr), CO2 levels aren't falling.

I think it's because Marine NPP has fallen so much.
Not to say we shouldn't try to increase terrestrial NPP also (bogs and golf courses).

But for food and fuel we already appropriate 40% of terrestrial NPP. I think we should look to the marine NPP to increase our food and fuel resources.

~SA

Pyrolysis creates reduced carbon! ...Time for the next step in our evolutionary symbiosis with fire.