Climate variability / Water Availability / Southern Africa / Sensitivity Analysis / Biological Sciences / Environmental Sciences / South Africa / Kruger National Park / Ecosystems / Performance Model / Scaling up / Spatial Distribution / Technical Efficiency of crop production / Arid Region / National Park / Air Temperature / THERMAL INFRARED REMOTE SENSING DATA / Leaf Litter / Spatial resolution / Vegetation Cover / Temporal Variability / Environmental Sciences / South Africa / Kruger National Park / Ecosystems / Performance Model / Scaling up / Spatial Distribution / Technical Efficiency of crop production / Arid Region / National Park / Air Temperature / THERMAL INFRARED REMOTE SENSING DATA / Leaf Litter / Spatial resolution / Vegetation Cover / Temporal Variability