Table 3 Importance ranking group of each land cover type in Figs. 2, 3 and 4
From: The global impact factors of net primary production in different land cover types from 2005 to 2011
Forests (Fig. 2a) | 1st | Latitude and irradiance ultraviolet |
2nd | NDVI | |
3rd | Height, CO2 and anthropogenic impact | |
4th | Others, such as aerosol index, NO2, soil temperature, soil moisture | |
Shrub lands (Fig. 2b) | 1st | NDVI |
2nd | Latitude, height, irradiance ultraviolet, surface emissivity | |
3rd | Anthropogenic impact, precipitation | |
4th | Others, such as aerosol index, NO2, soil temperature, soil moisture | |
Savannas (Fig. 2c) | 1st | Latitude and NDVI |
2nd | Irradiance ultraviolet and surface emissions | |
3rd | Precipitation, height, soil temperature, land surface temperature, wind speed and anthropogenic impact | |
4th | Others | |
Grasslands (Fig. 3a) | 1st | Latitude and NDVI |
2nd | Height, irradiance ultraviolet and surface emissivity | |
3rd | CO2, precipitation, wind speed and anthropogenic impact | |
4th | Others, such as soil temperature, FRP, land surface temperature | |
Permanent wetlands (Fig. 3b) | 1st | NDVI |
2nd | Wind speed | |
3rd | Latitude, irradiance ultraviolet, surface emissivity and precipitation | |
4th | Others, anthropogenic impact belongs to this group | |
Croplands and Built-up area (Fig. 3c) | 1st | NDVI |
2nd | Irradiance ultraviolet, latitude and surface emissivity | |
3rd | Precipitation, height, soil temperature, anthropogenic impact | |
4th | Others, including soil moisture, FRP, all-wave radiation | |
Snow and ice (Fig. 4a) | 1st | NDVI |
2nd | Latitude | |
3rd | Irradiance ultraviolet and surface emissivity | |
4th | Others, including anthropogenic impact | |
Barren & Sparsely vegetated (Fig. 4b) | 1st | Latitude |
2nd | NDVI, irradiance ultraviolet, surface emissivity | |
3rd | Others | |
4th | – |