Baseflow adjusted snowmelt runoff and rainfall runoff from TerraClimate

We update the total runoff and runoff partitioned from snowmelt from
TerraClimate using a modified water balance model that better accounts for
baseflow lags in hydrology for use in basin level water supply
availability at monthly time scales. These data complement existing
TerraClimate 1-d water balance similations, but show much has improved
montly correlative skill (median r=0.88) to observed streamflow across
watersheds globally watersheds compared with the original method from
TerraClimate (median r=0.75). These data can be used to quantify gaps in
monthly water demand for downstream water uses including agriculture.