This session explores the role of liquid water throughout glaciers and ice sheets and the impact of water on ice dynamics, mass balance, geomorphology, and downstream hydrology. Water is melted, stored, and routed through glaciers by features including supraglacial lakes, streams, and saturated snow or firn; englacial crevasses, moulins, and conduits; subglacial drainage channels, cavities, saturated till, and frozen sediments; and proglacial lakes, streams, fjords, and oceans. Connections between these components shape the glacial hydrologic system, which transports water from the ice surface to bed, modulates glacier velocities, redistributes glacier mass, facilitates glacial erosion, influences calving rates, and impacts downstream water resources. Advances in observing, inferring, and modeling glacier hydrology strengthen our ability to predict how glacial systems and glaciated environments will respond to climate variations. We invite contributions considering any aspects of glacial hydrology on all scales.

• H - Hydrology