Geoscience Reference
In-Depth Information
Table 6.24 Reservoirs and fluxes of carbon as CO
2
in the biosphere in a simulation model of the
global biogeochemical cycle of carbon dioxide shown in Fig.
6.28
CO
2
reservoirs and
fl
uxes
Identi
er
Tthe reservoir (GtC) or
fl
ux
(GtC/year)
Atmosphere
C
A
650
-
750
Ocean
Photic layer of the ocean above the thermocline
C
U
380
520
-
Intermediate photic layer of the ocean
C
I
280
-
610
Ocean plants (algae)
C
ĘŚ
3
Living elements
C
L
1.5
Detritus
C
DT
29
Deep layers of the ocean
C
D
28,500
-
33,890
Bottom layer of the ocean
C
B
5,000
wLand
Dead organic matter (in soil and peat)
C
S
1,500
-
3,000
Vegetation
C
V
550
610
-
Permafrost
C
P
1,672
Living organisms
C
LO
0.5
Fossil fuels
Coal
C
C
4,500
Oil
C
O
500
Gas
C
G
5,000
Emission due to burning of the vegetation
F
8
6.9
Fossil fuel and cement production
F
28
4,000
Rock weathering
F
4
0.04
Volcanic emanations
F
5
2.7
Assimilation by land vegetation
F
6
224.4
Respiration
Plants
F
7
50
59.3
-
Human
F
10
0.7
Animals
F
11
4.1
Emissions
Decomposed soil humus
F
9
139.5
Plants roots
F
15
56.1
Permafrost melting
F
2
190
Vital functions
Human population
F
12
0.3
Animals
F
13
3.1
Vegetation decay
F
14
31.5
50
-
Sedimentation to bottom deposits
F
16
0.1
0.2
-
Solution of marine sediments
F
17
0.1
(continued)
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