Online-only Table 3 List and details of the extra climate, soil and geographical variables added to the original dataset; indicating the database source and including the units and spatial and temporal resolution.
From: A global, empirical, harmonised dataset of soil organic carbon changes under perennial crops
Dataset | Variable | Units | Spatial Resolution | Temporal resolution | Name in database |
|---|---|---|---|---|---|
SRTM | Elevation | Meters above sea level | 30 m | elevation | |
QGIS (STMR) | Slope | Angle | 30 m | slope | |
Aspect | 30 m | aspect | |||
Hillshade | 30 m | Hillshade | |||
Roughness | 30 m | roughness | |||
World Clim v2 | Solar radiation per month | KJ/m2 | 30 seconds (~1 km2) | Averaged monthly 1970–2000 | ‘SolarRad_Jan’ to ‘SolarRad_Dec’ |
Bio 1: Annual Mean Temperature | Celsius | 30 seconds (~1 km2) | Annual Mean Temperature | Bio1 | |
Bio 2: Mean Diurnal Range (Mean of monthly (max temp - min temp)) | — | 30 seconds (~1 km2) | Annual | Bio2 | |
Bio 3: Isothermality (BIO2/BIO7) (*100) | — | 30 seconds (~1 km2) | Annual | Bio3 | |
Bio 4: Temperature Seasonality (standard deviation *100) | Celsius | 30 seconds (~1 km2) | Annual | Bio4 | |
Bio 5: Max Temperature of Warmest Month | Celsius | 30 seconds (~1 km2) | Annual | Bio5 | |
Bio 6: Min Temperature of Coldest Month | Celsius | 30 seconds (~1 km2) | Annual | Bio6 | |
Bio 7: Temperature Annual Range (BIO5-BIO6) | — | 30 seconds (~1 km2) | Annual | Bio7 | |
Bio 8: Mean Temperature of Wettest Quarter | Celsius | 30 seconds (~1 km2) | Annual | Bio8 | |
Bio 9: Mean Temperature of Driest Quarter | Celsius | 30 seconds (~1 km2) | Annual | Bio9 | |
Bio 10: Mean Temperature of Warmest Quarter | Celsius | 30 seconds (~1 km2) | Annual | Bio10 | |
Bio 11: Mean Temperature of Coldest Quarter | Celsius | 30 seconds (~1 km2) | Annual | Bio11 | |
Bio 12: Annual Precipitation | mm | 30 seconds (~1 km2) | Annual | Bio12 | |
Bio 13: Precipitation of Wettest Month | mm | 30 seconds (~1 km2) | Annual | Bio13 | |
Bio 14: Precipitation of Driest Month | mm | 30 seconds (~1 km2) | Annual | Bio14 | |
Bio 15: Precipitation Seasonality (Coefficient of Variation) | mm | 30 seconds (~1 km2) | Annual | Bio15 | |
Bio 16: Precipitation of Wettest Quarter | mm | 30 seconds (~1 km2) | Annual | Bio16 | |
Bio 17: Precipitation of Driest Quarter | mm | 30 seconds (~1 km2) | Annual | Bio17 | |
Bio 18: Precipitation of Warmest Quarter | mm | 30 seconds (~1 km2) | Annual | Bio18 | |
Bio 19: Precipitation of Coldest Quarter | mm | 30 seconds (~1 km2) | Annual | Bio19 | |
Chave et al. (2015) | Climate water deficit (CWD) | — | Annual | CWD | |
P/(T + 10) | Bio12/(Bio 1 + 10) | mm/Celisus | 30 seconds (~1 km2) | Annual | PT10 |
Soil Grids | Absolute depth to bedrock | cm | 250 m | — | BedDepth |
Bulk density at 7 different depths* | Kg/m3 of the fine earth fraction (<2 mm) | 250 m | — | ‘BD_1’ to ‘BD_7’ | |
pH in H2O at 7 different depths* | pH in H2O | 250 m | — | ‘pH_1’ to ‘pH_7’ | |
Clay at 7 different depths* | % | 250 m | — | ‘clay_1’ to ‘clay_7’ | |
Soil Grids | Silt at 7 different depths* | % | 250 m | — | ‘Silt_1’ to ‘Silt_7’ |
Sand at 7 different depths* | % | 250 m | — | ‘Sand_1’ to ‘Sand_7’ | |
Cation-exchange capacity at 7 different depths* | Cmol+/kg of the fine earth fraction (<2 mm) | 250 m | — | ‘CAT_1’ to ‘CAT_7’ | |
Coarse fragments volumetric fraction at 7 different depths* | % | 250 m | — | ‘CVOL_1’ to ‘CVOL_7’ | |
Available soil water capacity (volumetric fraction) until wilting point at 7 different depths* | % | 250 m | — | ‘WatCap_1’ to ‘WatCap_7’ | |
Available soil water capacity (volumetric fraction) for h1 at 7 different depths* | % | 250 m | — | ‘WCat1h_1’ to ‘WCat1h_7’ | |
Saturated water content (volumetric fraction) for tS at 7 different depths* | % | 250 m | — | ‘SatWat_1’ to ‘SatWat_7’ | |
Soil organic carbon density in kg per cubic-m at 7 different depths* | kg per cubic-m | 250 m | — | ‘GRIDSOC_kgm3_1’ to ‘GRIDSOC_ kgm3_7’ | |
Soil organic carbon stock in tons per ha at 6 different depths* plus three extra depths (30 to 250 m; 100 to 250 m and 200 to 250 m) | tons per ha | 250 m | — | ‘GRIDSOC_tonha_1’ to ‘GRIDSOC_tonha _6’ and ‘GRIDSOC_tonha _30_250’, ‘GRIDSOC_tonha _100_250’, ‘GRIDSOC_tonha _200_250’ | |
Soil organic carbon content (fine earth fraction) in g per kg at 7 different depths* | % | 250 m | — | ‘GRIDSOC_gKg_1’ to ‘GRIDSO_gKg _7’ | |
FAO | Slope class | class | 30 m | Slope Class* | |
FAO | Eco regions | — | — | Ecoregion* |
