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| Titel |
The effect of sea-level rise on the stress regime of the Brunt and Riiser-Larsen ice shelves |
| VerfasserIn |
Thomas Kleiner, Angelika Humbert, Manfred A. Lange |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250053083
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| Zusammenfassung |
| Ice rises and rumples act as pinning points along the ice front of ice shelves. The smaller
these grounded areas are, the more likely they are getting afloat in case of sea level rise. The
Brunt Ice Shelf is an unbounded ice shelf situated along Caird Coast (East Antarctica) that is
confined by a small ice rise, the McDonald Ice Rumples. Along the ice front and in the
interior of the adjacent Riiser-Larsen Ice Shelf a number of small ice rises and a mixed
ice-rise/ice-rumple feature exists.
In this study we assume that these grounded zones are highly affected by future sea-level
rise. In order to investigate the response of the ice shelves to decreased and vanishing pinning
we apply various geometric settings in which a prescribed sea level rise is used to reduce the
grounded area of the Brunt and Riiser-Larsen ice shelves to the full-Stokes finite difference
model TIM - FD3. TIM - FD3 is a numerical thermo-coupled ice flow model,
that solves the full-Stokes equations, the heat transfer equation and ice thickness
evolution equation in three-dimensions on a 1km horizontal grid scale. We compare the
simulated stress fields, principal deformation rates and axes to the present day situation.
Furthermore, we analyse the temporal evolution of the stress field and estimate the
response time of the ice shelf system to the ungrounding of the pinning points. |
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