Table 1 Modelled global stocks of OC-Fe and OC-Femax as well as global mean values of fsOC-Fe and fmOC-Fe within the 0–30 cm soil layer across different ecosystems
From: Important role of Fe oxides in global soil carbon stabilization and stocks
Ecosystem | Area (million km2) | Depth (cm) | OC-Fe (PgC) | OC-Femax (PgC) | fsOC-Fe (%) | fmOC-Fe (%) | OC-Fe saturation (%) | OC-Fe deficit (PgC) |
|---|---|---|---|---|---|---|---|---|
Cropland | 13.6 | 0-5 | 4.1(2.1,7.9) | 25.7(4.3,56.9) | 25.6 ± 9.6 | 45.7 ± 18.3 | 36.0 ± 38.5 | 21.6(0.0,52.0) |
5−15 | 5.9(2.1,13.6) | 54.4(9.0,118.6) | 23.8 ± 10.7 | 32.8 ± 18.6 | 21.6 ± 22.7 | 48.4(3.5,112.0) | ||
15−30 | 10.2(5.4,20.2) | 83.2(13.5,178.4) | 31.4 ± 10.5 | 49.6 ± 22.1 | 24.9 ± 23.1 | 73.0(4.4,167.3) | ||
total | 20.2(10.2,39.1) | 163.3(26.9,355.0) | 27.4 ± 9.0 | 42.2 ± 18.1 | 25.5 ± 24.4 | 143.0(7.6,333.5) | ||
Forest | 49.2 | 0-5 | 13.0(6.0,23.8) | 79.8(12.4,116.8) | 27.3 ± 8.8 | 50.6 ± 17.4 | 23.9 ± 28.9 | 66.8(2.2,103.5) |
5-15 | 40.4(10.2,90.2) | 208.8(33.0,309.8) | 39.0 ± 19.0 | 57.3 ± 29.9 | 27.8 ± 44.9 | 168.4(9.2,277.0) | ||
15-30 | 64.8(21.8,129.5) | 346.5(53.6,503.5) | 45.3 ± 15.8 | 72.1 ± 28.6 | 26.3 ± 31.2 | 281.7(12.1,451.7) | ||
total | 118.2(43.9,231.6) | 635.1(96.4,987.3) | 40.8 ± 15.6 | 65.2 ± 27.6 | 27.8 ± 35.6 | 516.9(23.2,886.3) | ||
Grassland | 37.7 | 0-5 | 9.6(4.9,18.5) | 41.1(8.2,105.3) | 24.0 ± 9.5 | 40.9 ± 15.0 | 48.2 ± 44.3 | 31.5(0.0,93.4) |
5-15 | 22.1(5.4,65.6) | 104.0(19.1,245.1) | 26.4 ± 17.8 | 38.0 ± 27.5 | 34.0 ± 41.0 | 81.8(3.0,222.4) | ||
15-30 | 36.6(14.0,99.4) | 170.9(34.2,384.8) | 32.7 ± 14.9 | 49.9 ± 24.3 | 35.1 ± 31.4 | 134.2(4.6,349.3) | ||
total | 68.3(26.8,167.6) | 316.0(59.9,756.9) | 29.9 ± 15.5 | 45.7 ± 24.8 | 37.1 ± 35.1 | 247.5(5.4,686.2) | ||
Shrubland | 14.1 | 0-5 | 4.2(2.6,8.2) | 15.8(3.2,48.1) | 26.4 ± 9.9 | 41.7 ± 14.5 | 57.4 ± 49.1 | 11.6(0.0,42.8) |
5-15 | 6.6(2.5,14.3) | 33.4(6.6,99.6) | 22.6 ± 13.3 | 32.1 ± 19.7 | 36.7 ± 40.4 | 26.8(0.0,89.6) | ||
15-30 | 11.5(6.5,20.9) | 53.8(9.9,155.1) | 29.0 ± 10.7 | 42.5 ± 17.5 | 42.1 ± 35.8 | 42.2(0.0,140.0) | ||
total | 22.3(12.2,43.2) | 103.0(19.9,303.5) | 26.4 ± 10.8 | 39.0 ± 17.1 | 42.7 ± 37.8 | 80.6(0.0,273.8) | ||
Wetland | 2.2 | 0-5 | 0.3(0.2,0.7) | 2.5(0.3,4.2) | 22.2 ± 9.1 | 37.7 ± 15.4 | 49.2 ± 34.3 | 0.9(0.0,3.8) |
5-15 | 1.3(0.2,6.1) | 3.8(0.9,10.4) | 27.3 ± 23.9 | 43.7 ± 38.7 | 47.3 ± 46.4 | 1.3(0.0,9.4) | ||
15-30 | 2.3(0.7,6.9) | 7.1(1.6,17.7) | 32.5 ± 19.2 | 52.9 ± 29.9 | 45.4 ± 82.6 | 4.8(0.0,15.6) | ||
total | 3.9(1.2,11.6) | 13.4(2.9,34.0) | 31.3 ± 20.8 | 51.7 ± 32.7 | 48.5 ± 57.9 | 7.0(0.0,30.8) | ||
Global total/mean | 130.1 | 0-5 | 31.2(15.3,60.3) | 164.9(21.8,341.9) | 25.8 ± 9.4 | 45.1 ± 16.9 | 39.7 ± 41.7 | 132.4(0.0,306.1) |
5−15 | 76.3(17.1,207.2) | 404.4(60.0,805.2) | 30.4 ± 18.4 | 44.1 ± 28.7 | 30.6 ± 41.8 | 326.7(11.1,732.8) | ||
15-30 | 125.4(45.0,306.7) | 661.5(94.5,1268.9) | 37.1 ± 15.9 | 57.8 ± 27.9 | 31.5 ± 32.0 | 535.9(15.3,1153.9) | ||
total | 232.9(86.3,523.4) | 1230.8(189.0,2501.9) | 33.5 ± 15.6 | 52.3 ± 26.8 | 33.0 ± 35.6 | 995.0(21.6,2274.5) |
