Groundwater is by far the largest unfrozen freshwater resource on the planet. It plays a
critical role as the bottom of the hydrologic cycle, redistributing water in the subsurface and …

The time that water takes to travel through the terrestrial hydrological cycle and the critical
zone is of great interest in Earth system sciences with broad implications for water quality …

Understanding freshwater fluxes at continental scales will help us better predict hydrologic
response and manage our terrestrial water resources. The partitioning of evapotranspiration …

Groundwater recharge indicates the existence of renewable groundwater resources and is
therefore an important component in sustainability studies. However, recharge is also one of …

In hydrology, two somewhat competing philosophies form the basis of most process-based
models. At one endpoint of this continuum are detailed, high-resolution descriptions of small …

Watersheds have served as one of our most basic units of organization in hydrology for over
300 years (Dooge, 1988, https://doi. org/10.1080/02626668809491223; McDonnell, 2017 …

The spatial distribution of subsurface parameters such as permeability are increasingly
relevant for regional to global climate, land surface, and hydrologic models that are …

Continental-to global-scale hydrologic and land surface models increasingly include
representations of the groundwater system. Such large-scale models are essential for …

A negative feedback between silicate weathering rates and climate is hypothesized to play a
central role in moderating atmospheric CO 2 concentrations on geologic timescales …

Tracer data demonstrate that waters in aquifers are often much older than the stream waters
that drain them. This contrast in water ages has lacked a general quantitative explanation …