Journal of Glaciology
The floating terminal of Jakobshavn Isbr ae, 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 Isbrie, Greenland" (2004). Earth Science Faculty Scholarship. 46.
Johnson, JV, Prescott, PR, and Hughes, TJ, 2004, Ice Dynamics Preceding Catastrophic Disintegration of the Floating Part of Jakobshavn Isbrie, Greenland: Journal of Glaciology, v. 50, p. 492-504. Available on publisher's site at: http://www.ingentaconnect.com/content/igsoc/jog/2004/00000050/00000171/art00003
© Copyright 2004 by the International Glaciological Society
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