Groundwater Regulates Interannual Variations in Evapotranspiration in a Riparian Semiarid Ecosystem Journal of Geophysical Research: Atmospheres

Drylands are an important component of Earth's carbon, water, and energy budgets. Changes in hydroclimatic conditions can significantly alter land surface fluxes in these ecosystems. In regions with groundwater-river water exchange, land surface fluxes are strongly modulated by groundwater table fluctuations in response to river stage variations; however, interactions between fluxes and groundwater remain poorly understood in drylands. Here, we use eddy covariance data collected in paired upland and riparian semiarid ecosystems (AmeriFlux sites US-Hn1 and US-Hn2) during 4 years with contrasting river flow conditions to examine interactions among river stage, water table