Geoscience Reference
In-Depth Information
Table 8.5 List of models simulating the decomposition of basic carbon reservoirs
Carbon reservoir
Decomposition model
Decomposed components
(released part)
Surface structure
(lignine, C
1L
)
D
C
1L
¼
0
:
325f
1
ð
T
s
Þ
f
2
ð
M
Þ
exp
3L
s
f
g
C
1L
CO
2
(0.3)
Slow carbon (0.7)
Surface structure
(cellulose, C
1C
)
D
C
1C
¼ 0
:
325f
1
T
ð
f
2
ðÞ
exp
3L
s
f
g
C
1C
CO
2
Surface microorganisms
(0.4)
Soil structure
(lignin, C
2L
)
D
C
2L
¼
0
:
4f
1
ð
T
s
Þ
f
2
ð
M
Þ
exp
3L
s
f
g
C
2L
CO
2
(0.3)
Slow carbon (0.7)
Soil structure
(cellulose, C
2C
)
D
C
2C
¼ 0
:
4 f
1
T
ð
f
2
ðÞ
exp
3L
s
f
g
C
2C
CO
2
(0.55)
Soil microorganisms
(0.45)
Soil
microorganisms
(C
3
)
D
C
3
¼
0
:
6083 f
1
T
ð
f
2
ðÞ
1
0
ð
;
75S
Þ
C
3
CO
2
(0.85
−
0.68S)
Slow carbon
(0.147 + 0.68S
−
0.032T
c
)
Surface
microorganisms
(C
4
)
D
C
4
¼
0
:
5 f
1
T
ð
f
2
ð
C
4
CO
2
(0.6)
Slow carbon (0.4)
Surface
metabolism (C
5
)
D
C
5
¼
0
:
2083 f
1
T
ð
f
2
ð
C
5
CO
2
(0.6)
Surface microorganisms
(0.4)
Soil metabolism
(C
6
)
D
C
6
¼ 1
:
5417 f
1
T
ð
f
2
ð
C
5
CO
2
(0.55)
Soil microorganisms
(0.45)
Slow carbon (C
7
)
D
C
7
¼
0
:
01667 f
1
T
ð
f
2
ð
C
5
CO
2
(0.55)
Soil microorganisms
(0.447 + 0.009T
c
)
(C
8
)
D
C
8
¼
0
:
000375 f
1
T
ð
f
2
ð
C
8
CO
2
(0.55)
Passive carbon
Soil microorganisms
(0.45)
Notation L
s
is the carbon part in the lignine form, S is the part of alumina content in the soil
model of carbon balance for the whole of the forest ecosystem taking into account
the eight levels of carbon reservoirs (Table
8.5
). The model allows the consider-
ation of strati
ed physical soil structure taking into account the erosion and
deposition processes. Two-stage procedure includes sub-blocks that describe:
circulation of biogenic salts in the plant-soil system (grass ecosystems, agri-
cultural
fields, forests, and savannas),
decomposition of the soil organic matter,
formation of the forest ecosystem production,
water balance of the vegetation-soil system, and
fl
flows of the carbon, nitrogen, phosphorus, and sulphur.
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