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Table 2 Look-up table of annual fractional change (average = µ; standard error = σ) in aboveground carbon (AGC) and belowground carbon (BGC) in undisturbed forests, based on FIA plot data

From: Attribution of net carbon change by disturbance type across forest lands of the conterminous United States

Region Forest type Drought Initial C n AGC µ AGC σ BGC µ BGC σ
North Softwood No <25 5167 0.064 0.135 0.080 0.199
North Softwood No 25–50 3459 0.023 0.034 0.023 0.034
North Softwood No 50–100 2085 0.016 0.024 0.016 0.024
North Softwood No ≥100 345 0.013 0.034 0.013 0.034
North Softwood Yes <25 50 0.028 0.030 0.031 0.035
North Softwood Yes 25–50 50 0.008 0.034 0.008 0.035
North Softwood Yes 50–100 12 0.016 0.040 0.016 0.040
North Softwood Yes ≥100 2 0.013 0.017 0.013 0.016
North Hardwood No <25 12,559 0.074 0.102 0.087 0.131
North Hardwood No 25–50 13,656 0.025 0.036 0.025 0.036
North Hardwood No 50–100 14,173 0.014 0.026 0.014 0.026
North Hardwood No ≥100 3265 0.010 0.030 0.010 0.030
North Hardwood Yes <25 19 0.016 0.058 0.016 0.062
North Hardwood Yes 25–50 12 0.006 0.040 0.006 0.041
North Hardwood Yes 50–100 7 0.001 0.026 0.000 0.027
North Hardwood Yes ≥100 1 0.006 NA 0.005 NA
South Softwood No <25 3648 0.314 0.355 0.452 0.621
South Softwood No 25–50 2940 0.082 0.069 0.085 0.072
South Softwood No 50–100 2345 0.039 0.049 0.039 0.050
South Softwood No ≥100 673 0.021 0.050 0.020 0.051
South Softwood Yes <25 464 0.340 0.407 0.487 0.694
South Softwood Yes 25–50 348 0.081 0.071 0.084 0.074
South Softwood Yes 50–100 299 0.038 0.039 0.038 0.041
South Softwood Yes ≥100 110 0.020 0.038 0.020 0.039
South Hardwood No <25 6585 0.133 0.191 0.176 0.291
South Hardwood No 25–50 6180 0.040 0.044 0.041 0.045
South Hardwood No 50–100 8244 0.021 0.032 0.021 0.032
South Hardwood No ≥100 2697 0.014 0.032 0.014 0.032
South Hardwood Yes <25 630 0.140 0.184 0.185 0.272
South Hardwood Yes 25–50 498 0.042 0.062 0.044 0.064
South Hardwood Yes 50–100 756 0.021 0.029 0.021 0.030
South Hardwood Yes ≥100 275 0.011 0.029 0.011 0.029
West Softwood No <25 56 0.061 0.102 0.079 0.123
West Softwood No 25–50 45 0.027 0.048 0.028 0.049
West Softwood No 50–100 61 0.022 0.026 0.022 0.027
West Softwood No ≥100 80 0.014 0.019 0.014 0.019
West Softwood Yes <25 0 0.310 NA 0.443 NA
West Softwood Yes 25–50 0 0.072 NA 0.075 NA
West Softwood Yes 50–100 0 0.037 NA 0.037 NA
West Softwood Yes ≥100 0 0.020 NA 0.020 NA
West Hardwood No <25 33 0.037 0.055 0.043 0.061
West Hardwood No 25–50 26 0.023 0.026 0.025 0.028
West Hardwood No 50–100 45 0.026 0.041 0.027 0.043
West Hardwood No ≥100 38 0.019 0.025 0.020 0.027
West Hardwood Yes <25 0 0.137 NA 0.180 NA
West Hardwood Yes 25–50 0 0.041 NA 0.043 NA
West Hardwood Yes 50–100 0 0.021 NA 0.021 NA
West Hardwood Yes ≥100 0 0.011 NA 0.011 NA
  1. Italics imputed from other regions