Journal of Glaciology
International Glaciological Society
The floating terminal of Jakobshavn Isbræ, the fastest Greenland ice stream, has disintegrated since 2002, resulting in a doubling of ice velocity and rapidly lowering inland ice elevations. Conditions prior to disintegration were modeled using control theory in a plane-stress solution, and the Missoula model of ice-shelf flow. Both approaches pointed to a mechanism that inhibits ice flow and that is not captured by either approach. Jamming of flow, an inherent property of granular materials passing through a constriction (Jakobshavn Isfjord), is postulated as the mechanism. Rapid disintegration of heavily crevassed floating ice accompanies break-up of the ice jam.
Johnson, Jesse V.; Prescott, Paul R.; and Hughes, Terence J., "Ice Dynamics Preceding Catastrophic Disintegration of the Floating Part of Jakobshavn Isbræ, Greenland" (2004). Computer Science Faculty Publications. 1.