Table 3 Estimation of carbon density and storage from different studies of Chinese grasslands †

From: Carbon storage in Chinese grassland ecosystems: Influence of different integrative methods

No.

Data and methods

Period

Area

(106ha)

Vegetation C density (kg C m−2)

Vegetation C storage(Pg C)

SOCdensity (kg C m−2)

SOC storage (Pg C)

Ecosystemstorage (Pg C) C

Reference

AGBC ‡

BGBC

Vegetation

AGBC

BGBC

Vegetation

1

Global mean C density

1980s

405.9

  

1.15

  

4.66

 

53.72

58.38

2

2

Global mean C density

1980s

299.0

  

1.15

  

3.06

13.10

41.03

44.09

22

3

Grassland resource survey

1980s

299.0

0.06

  

0.13

     

12

4

Grassland resource survey

1980s

331.4

0.05

 

0.35

0.15

 

1.15

   

10

5

Grassland resource survey& NDVI

1980s

331.4

0.04

0.27

0.32

0.15

0.90

1.05

   

13

6

Grassland resource survey &NDVI

1980s

334.1

0.04

0.27

0.32

0.15

0.91

1.05

   

14

7

CEVSA &NDVI

1981–1998

167.0

  

0.34

  

0.56

9.99

16.70

17.26

15

8

Grassland resource survey& Field-measured data

1980s 2003–2004

331.0

0.12

0.88

1.00

0.39

2.92

3.32

   

21

9

Second soil survey

1980s

249.3

      

13.54

37.70

 

26

10

Integrating data

1980s–2000s

331.4

  

0.82

  

2.72

12.99

43.00

45.51

35

11

Field-measured data

2003–2014

355.05

0.08

0.42

0.50

0.23

1.38

1.61

7.96

29.37

30.98

This study

  1. †The soil depths for the estimation of SOC density and storage are all approximately 100 cm in this table
  2. ‡AGBC, carbon density of the above-ground biomass; BGBC, carbon density of the below-ground biomass.
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