The Natural Fix?

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Atmosphere

Ocean carbon cycle

750

92

Ocean surface

90

1 020

Rivers

0.8

50

- -

-

-

-

-

Dissolved organic C

-

96.1

-

-

-

-

40

6

-

-

-

-

-

700

- - -- - - - - -- - - 3

Marine biota

-

-

-

- -

-

-

-

4

-

- -

100

- -

-

- -

-

6

-

-

-

-

-

-

- -

-

-

-

-

-

-

Deep ocean

- - -

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

38 100

-

-

-

-

-

-

-

-

-

-

-

-

-

0.2

- -

-

-

-

-

-

Carbon fluxes and stocks

-

- - -

-

Storage: Gigatonnes of C

1 020

-

-

-

-

-

-

150

Fluxes: Gigatonnes of C per year

8

Sediments

Source: IPCC, 2001.

31

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