Grassland type | Period | Regression models | Training set | Test set | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Constant | EVI | LAI | LSWI | LST | R2 | RMSE | R2 | RMSE | ||
Temperate meadow steppe | Growing | 1.088 | 4.078 | – | 3.743 | – | 0.57 | 0.72 | 0.77 | 0.45 |
Dormant | 0.064 | 2.362 | – | 0.268 | 0.014 | 0.61 | 0.13 | |||
Entire year | − 0.619 | 8.487 | – | – | 0.018 | 0.80 | 0.51 | 0.71 | 0.63 | |
Typical steppe | Growing | 0.561 | – | – | 6.058 | 0.096 | 0.72 | 0.60 | 0.88 | 0.41 |
Dormant | 0.044 | 3.463 | – | 0.659 | 0.021 | 0.41 | 0.26 | |||
Entire year | − 0.083 | 5.633 | – | 1.419 | 0.040 | 0.84 | 0.49 | 0.81 | 0.50 | |
Desert steppe | Growing | 0.213 | – | 0.758 | – | – | 0.39 | 0.32 | 0.50 | 0.21 |
Dormant | 0.122 | 2.035 | – | – | − 0.003 | 0.11 | 0.17 | |||
Entire year | 0.190 | – | 0.775 | – | – | 0.43 | 0.25 | 0.45 | 0.27 | |
Alpine meadow | Growing | − 0.321 | 7.198 | − 0.208 | 2.854 | – | 0.73 | 0.98 | 0.85 | 0.67 |
Dormant | − 0.264 | 3.826 | 0.897 | 0.804 | 0.019 | 0.65 | 0.20 | |||
Entire year | − 0.520 | 6.947 | – | 1.318 | 0.020 | 0.81 | 0.67 | 0.83 | 0.69 |