Table 2. CV of global maize, wheat, rice, and soybean productivity (%) over 28 years (1981–2008) of the 10 individual GGCMs, their ensemble median and FAO statistics [39].
Data are shown for actual, unlimited (uWN), unlimited nutrients (uN) and unlimited water (uW) conditions and have been detrended prior to computing CVs. FAO data is only available for actual conditions. For better readability, the lowest CVs per model (rows) are colored green, highest are colored orange.
| Crop | GGCM | actual | uWN | uN | uW |
|---|---|---|---|---|---|
| Maize | pDSSAT | 3.93 | 3.31 | 5.08 | 2.37 |
| EPIC-Boku | 3.41 | 2.30 | 3.53 | 1.97 | |
| EPIC-IIASA | 2.88 | 2.51 | 2.97 | 1.89 | |
| GEPIC | 5.10 | 3.08 | 4.70 | 2.88 | |
| pAPSIM | 4.13 | 2.77 | 4.57 | 1.79 | |
| PEGASUS | 3.82 | 1.37 | 2.71 | 4.16 | |
| CLM-Crop | 2.45 | 2.37 | 2.44 | 2.58 | |
| EPIC-TAMU | 4.00 | 2.85 | 3.90 | 2.27 | |
| ORCHIDEE-crop | NA | NA | NA | NA | |
| PEPIC | 4.31 | 1.65 | 3.70 | 1.44 | |
| median | 3.93 | 2.51 | 3.70 | 2.27 | |
| FAO | 4.08 | NA | NA | NA | |
| Wheat | pDSSAT | 10.13 | 8.73 | 9.83 | 8.93 |
| EPIC-Boku | 3.53 | 2.25 | 3.57 | 2.26 | |
| EPIC-IIASA | 8.86 | 7.93 | 9.22 | 8.01 | |
| GEPIC | 8.13 | 7.46 | 8.31 | 7.68 | |
| pAPSIM | 9.64 | 8.97 | 9.86 | 8.81 | |
| PEGASUS | 2.93 | 2.28 | 3.46 | 3.40 | |
| CLM-Crop | 3.54 | 1.48 | 3.50 | 1.32 | |
| EPIC-TAMU | 8.37 | 6.84 | 8.66 | 7.00 | |
| ORCHIDEE-crop | 8.75 | 6.19 | 8.82 | 6.10 | |
| PEPIC | 2.94 | 1.60 | 3.14 | 1.44 | |
| median | 8.25 | 6.51 | 8.48 | 6.55 | |
| FAO | 2.34 | NA | NA | NA | |
| Rice | pDSSAT | 4.94 | 5.14 | 5.70 | 4.42 |
| EPIC-Boku | 1.16 | 1.02 | 1.40 | 0.86 | |
| EPIC-IIASA | 2.58 | 2.44 | 2.75 | 2.32 | |
| GEPIC | 2.26 | 2.76 | 2.73 | 2.28 | |
| pAPSIM | NA | NA | NA | NA | |
| PEGASUS | NA | NA | NA | NA | |
| CLM-Crop | 3.59 | 2.89 | 3.69 | 2.73 | |
| EPIC-TAMU | NA | NA | NA | NA | |
| ORCHIDEE-crop | 1.70 | 1.58 | 1.74 | 1.55 | |
| PEPIC | 0.80 | 1.37 | 1.15 | 1.02 | |
| median | 2.26 | 2.44 | 2.73 | 2.28 | |
| FAO | 1.14 | NA | NA | NA | |
| Soybean | pDSSAT | 8.09 | 5.29 | 8.15 | 5.36 |
| EPIC-Boku | 5.58 | 2.79 | 5.58 | 2.80 | |
| EPIC-IIASA | 4.93 | 5.86 | 5.94 | 4.43 | |
| GEPIC | 6.21 | 4.96 | 6.06 | 4.51 | |
| pAPSIM | 6.44 | 5.39 | 6.42 | 5.39 | |
| PEGASUS | 4.04 | 3.68 | 4.04 | 3.68 | |
| CLM-Crop | 11.55 | 10.30 | 10.93 | 11.03 | |
| EPIC-TAMU | NA | NA | NA | NA | |
| ORCHIDEE-crop | NA | NA | NA | NA | |
| PEPIC | 3.78 | 2.30 | 3.62 | 2.38 | |
| median | 5.90 | 5.12 | 6.00 | 4.47 | |
| FAO | 3.10 | NA | NA | NA |