Reference for the data and files in this directory.
1. GloElev_5min.asc: Global elevation data at 5-arcmin resolution obtained from the HWSD database (Fischer et al., 2008)
2. MAT_MAP_CRUJRAv2.nc4: Global annual mean temperature and annual total precipitation were derived from the CRU-JRA v2.0 dataset (an update of (Harris, 2019); https://catalogue.ceda.ac.uk/uuid/7f785c0e80aa4df2b39d068ce7351bbb) 
3. Global-Aridity_ET0_8km.nc4: Global aridity index (AI) from the CGIAR-CSI Global-Aridity and Global-PET Database (Zomer et al., 2007;  Zomer et al., 2008) (version 2, accessed Feb. 2020 http://www.cgiar-csi.org) 

Reference:
Fischer, G., Nachtergaele, F., Prieler, S., Van Velthuizen, H., Verelst, L., & Wiberg, D. (2008). Global agro-ecological zones assessment for agriculture (GAEZ 2008). IIASA, Laxenburg, Austria and FAO, Rome, Italy, 10.
Harris, I. C. (2019). CRU JRA v1. 1: A forcings dataset of gridded land surface blend of Climatic Research Unit (CRU) and Japanese reanalysis (JRA) data (2905 ed. Vol. 2905): University of East Anglia Climatic Research Unit Centre for Environmental Data Analysis.
Zomer, R., Bossio, D., Trabucco, A., Yuanjie, L., Gupta, D., & Singh, V. (2007). Trees and Water: Smallholder Agroforestry on Irrigated Lands in Northern India. Colombo, Sri Lanka: International Water Management Institute. pp 45. (IWMI Research Report 122).
Zomer, R. J., Trabucco, A., Bossio, D. A., & Verchot, L. V. (2008). Climate change mitigation: A spatial analysis of global land suitability for clean development mechanism afforestation and reforestation. Agriculture, Ecosystems & Environment, 126(1-2), 67-80. 


