A jökulhlaup is a type of glacial outburst flood that occurs when water trapped by a glacier or within a glacial lake is suddenly released. These floods can cause significant erosion, transport large amounts of sediment, and have major impacts on landscapes. Jökulhlaups are important in understanding glacial processes, flood dynamics, and landscape evolution.
Reference: Björnsson, H. (2002). “Subglacial Lakes and Jökulhlaups in Iceland.” Global and Planetary Change, 35(3-4), 255-271.