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net primary productivity
 Scale of some things Landmarks

Pre-release Draft

kg(C)/m2/yr kg(C)/m2/s
10-2 10-9
10-1 10-8
100 10-7

Landmarks

average net primary productivity
 of greenish areas 10-8 kg(Carbon)/m2/s of open ocean & desert 10-9 kg(Carbon)/m2/s

 A View from the Back of the Envelope Comments encouraged. - Mitchell N Charity

```Doables:
Explain kg(C).  As atoms,cells /s.
kg(total) vs kg(C)
what is peak productivity?
connect w biomass
```
```Notes:
kg/m^2/yr = kg/m^2/(10^7x3.156)s
0.01 to 1 is 10^-9 to 10^-7
```
```From [Cow, p 257]:
ecosystem - ave net primary productivity kg(C)/m^2/yr - kg(C)/m^2/s(x10^-8) -
swamp and marsh            1.13     3.6
algal bed and reef         0.90     2.9
tropical forests           0.83     2.6
estuaries                  0.81     2.6
temperate forests          0.56     1.8
boreal forests             0.36     1.1
savanna                    0.32     1.0
cultivated land            0.29     0.92
woodland and shurbland     0.27     0.86
grassland                  0.23     0.73
lake and stream            0.23     0.73
upwelling zones            0.23     0.73
continental shelf          0.16     0.51
tundra and alpine meadow   0.065    0.21
open ocean                 0.057    0.18
desert scrub               0.032    0.10
rock, ice, and sand        0.015    0.048

Range 10^2.
```
```History:
1997.Aug.16  Initial scribbles.
```