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Table 3 R 2 and root mean square error (RMSE, in tC∙ha−1∙a−1) at the calibration and validation sites

From: Estimating the carbon fluxes of forests with an individual-based forest model

  Wetzstein (calibration site) Tharandt (validation site)
  R 2 RMSE R 2 RMSE
GPP
 Lit.-based (M1) 0.73 7.91 0.59 10.47
 Calibrated (M2) 0.82 5.39 0.61 8.83
 Filter-based (M3) 0.80 5.72 0.61 9.57
Respiration
 Lit.-based (M1) 0.44 6.31 0.58 5.14
 Calibrated (M2) 0.54 4.64 0.62 4.92
 Filter-based (M3) 0.53 4.73 0.62 5.12
NEE
 Lit.-based (M1) 0.63 6.25 0.30 7.90
 Calibrated (M2) 0.66 5.43 0.38 6.87
 Filter-based (M3) 0.65 5.42 0.38 7.62
  1. Simulated fluxes are compared to observed values at the daily time scale (scale of the simulation output)