Contemporary ice sheet thinning drives subglacial groundwater exfiltration with potential feedbacks on glacier flow

Payne Institute Faculty Fellow Matthew Siegfried and Alexander A. Robel, Shi J. Sim, Colin Meyer, and Mines alum Chloe D. Gustafson write about how groundwater-laden sedimentary aquifers are extensive beneath large portions of the Greenland and Antarctic ice sheets. A reduction in the mechanical loading of aquifers is known to lead to groundwater exfiltration, a discharge of groundwater from the aquifer. Here, we provide a simple expression predicting exfiltration rates under a thinning ice sheet.   August 18, 2023.