4.Discussion
- We used three ET data, three precipitation data, one human water use data to calculate water resources, and three ET data and one GPP data to calculate WUE, obtained the following results. It can be found that WUE causes less uncertainty than water resources in the study of current vegetation potential (Fig.\ref{455510}a). Among the nine data combinations for water resources, precipitation had a greater effect on the results than ET. High precipitation in ERA resulted in higher potential values, and CMFD was the opposite(Fig.\ref{455510}a).