Table 1 Estimates of the tonnes C per hectare relationship and per biome estimate of total carbon storage potential using the original estimates from Bastin 2019, estimates derived using global datasets in the current study, and all estimates adjusted to exclude soil organic carbon. The biome-specific potential tree canopy cover is from Bastin 2019 Table S2

Boreal forests/taiga

178

239.2

− 240.4

42.6

− 42.8

86.1

45.3

15.3

8.1

Deserts and xeric shrublands

77.6

202.4

109.2

15.7

8.5

28.5

76.9

2.2

6

Flooded grasslands and savannas

9

202.5

375.7

1.8

3.4

28.6

63.7

0.3

0.6

Mangroves

2.6

282.5

190.5

0.7

0.5

198.9

105.9

0.5

0.3

Mediterranean forests, woodlands, and scrub

18.8

202.4

154.6

3.8

2.9

28.5

85.2

0.5

1.6

Montane grasslands and shrublands

19.3

202.4

136.9

3.9

2.6

28.5

120.1

0.6

2.3

Temperate broadleaf and mixed forests

109

154.7

1.7

16.9

0.2

80.4

81

8.8

8.8

Temperate conifer forests

35.9

154.7

106.6

5.6

3.8

80.4

108.6

2.9

3.9

Temperate grasslands, savannas, and shrublands

72.5

154.7

51.1

11.2

3.7

80.4

67.4

5.8

4.9

Tropical coniferous forests

7.1

282.5

144.4

2

1

198.9

97.9

1.4

0.7

Tropical dry broadleaf forests

32.8

282.5

171.4

9.3

5.6

198.9

101.8

6.5

3.3

Tropical grasslands, savannas, and shrublands

189.5

282.5

137.3

53.5

26

198.9

98

37.7

18.6

Tropical moist broadleaf forests

97.1

282.5

139.5

27.4

13.5

198.9

150.3

19.3

14.6

Tundra

50.6

202.4

− 9.9

10.2

− 0.5

28.5

38.6

1.4

2

Total

204.6

28.4 (71.7¹)

103.2

75.7