Dynamics of viscous grounding lines
We have used viscous fluids in simple laboratory experiments to explore the dynamics of grounding lines between marine ice sheets and the freely floating ice shelves into which they develop. We model the ice sheets as shear-dominated gravity currents, and the ice shelves as extensional gravity curre...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.694.8066 2023-05-15T16:41:58+02:00 Dynamics of viscous grounding lines Rosalyn A. V. Robison Herbert E. Huppert M. Grae Worster The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.694.8066 http://www.itg.cam.ac.uk/people/heh/Paper220.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.694.8066 http://www.itg.cam.ac.uk/people/heh/Paper220.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.itg.cam.ac.uk/people/heh/Paper220.pdf text 2009 ftciteseerx 2016-01-08T18:35:06Z We have used viscous fluids in simple laboratory experiments to explore the dynamics of grounding lines between marine ice sheets and the freely floating ice shelves into which they develop. We model the ice sheets as shear-dominated gravity currents, and the ice shelves as extensional gravity currents having zero shear to leading order. We consider the flow of viscous fluid down an inclined plane into a dense inviscid ‘ocean’. A fixed flux of fluid is supplied at the top of the plane, which is at ‘sea level’. The fluid forms a gravity current flowing down and attached to the plane for some distance before detaching to form a freely floating extensional current. We have derived a mathematical model of the flow that incorporates a new dynamic boundary condition for the position of the grounding line, where the gravity current loses contact with the solid base. The grounding line initially advances and eventually reaches a steady position. Good agreement between our theoretical predictions and experimental measurements and observations gives confidence in the fundamental assumptions of our model. 1. Text Ice Shelves Unknown |
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English |
description |
We have used viscous fluids in simple laboratory experiments to explore the dynamics of grounding lines between marine ice sheets and the freely floating ice shelves into which they develop. We model the ice sheets as shear-dominated gravity currents, and the ice shelves as extensional gravity currents having zero shear to leading order. We consider the flow of viscous fluid down an inclined plane into a dense inviscid ‘ocean’. A fixed flux of fluid is supplied at the top of the plane, which is at ‘sea level’. The fluid forms a gravity current flowing down and attached to the plane for some distance before detaching to form a freely floating extensional current. We have derived a mathematical model of the flow that incorporates a new dynamic boundary condition for the position of the grounding line, where the gravity current loses contact with the solid base. The grounding line initially advances and eventually reaches a steady position. Good agreement between our theoretical predictions and experimental measurements and observations gives confidence in the fundamental assumptions of our model. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Rosalyn A. V. Robison Herbert E. Huppert M. Grae Worster |
spellingShingle |
Rosalyn A. V. Robison Herbert E. Huppert M. Grae Worster Dynamics of viscous grounding lines |
author_facet |
Rosalyn A. V. Robison Herbert E. Huppert M. Grae Worster |
author_sort |
Rosalyn A. V. Robison |
title |
Dynamics of viscous grounding lines |
title_short |
Dynamics of viscous grounding lines |
title_full |
Dynamics of viscous grounding lines |
title_fullStr |
Dynamics of viscous grounding lines |
title_full_unstemmed |
Dynamics of viscous grounding lines |
title_sort |
dynamics of viscous grounding lines |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.694.8066 http://www.itg.cam.ac.uk/people/heh/Paper220.pdf |
genre |
Ice Shelves |
genre_facet |
Ice Shelves |
op_source |
http://www.itg.cam.ac.uk/people/heh/Paper220.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.694.8066 http://www.itg.cam.ac.uk/people/heh/Paper220.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766032436144111616 |