Table 2.
Variable definitions in this study.
| Factors | Definition | Description |
|---|---|---|
| Elev | Digital Elevation Model (DEM) on the Loess Plateau | Elevation (m) |
| Slope | Slope calculated by DEM on the Loess Plateau | Slope |
| TNDVI | NDVI calculated by TM data | Normalized difference vegetation index (NDVI) |
| L2011/L2012/L2013 | Average LAI of 2011/2012/2013 summer | Leaf area index (LAI) |
| F2011/F2012/F2013 | Average FPAR in 2011/2013/2013 summer | Fraction of Photosynthetically Active Radiation (FPAR) |
| FM | (F2011 + F2012 + F2013)/3 | |
| R2011/R2012/R2013 | Average rainfall of 2011, 2012,2013 | Rainfall (mm) |
| RM | (R2011 + R2012 + R2013)/3 | |
| SR2011/SR2012/SR2013 | Average rainfall in 2011/2012/2013 summer | |
| SRM | (SR2011 + SR2012 + SR2013)/3 | |
| HT2011HT2012/HT2013 | Average of the high temperature in 2011,2012,2013 | Temperature(°C) |
| HTM | (HT2011 + HT2012 + HT2013)/3 | |
| LM | (L2011 + L2012 + L2013)/3 | |
| LT2011/LT2012/LT2013 | Average of the low temperature in 2011/2012/2013 | |
| LTM | (LT2011 + LT2012 + LT2013)/3 | |
| ST2011/ST2012/ST2013 | Average temperature in 2011, 2012,2013 summer | |
| ST | (ST2011 + ST2012 + ST2013)/3 | |
| T2011/T2012/T2013 | Average temperature in 2011, 2012, 2013 | |
| TM | (T2011 + T2012 + T2013)/3 | |
| x | Longitude | Geographic location (°) |
| y | Latitude |