Analogue modelling of the influence of ice shelf collapse on the flow of ice sheets grounded below sea-level

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Published: 2018-07-27
DOI: https://doi.org/10.4401/ag-7356
Keywords:
Analogue modelling, ice shelf breakup, ice sheet instability, Antarctica

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Giacomo Corti
Consiglio Nazionale delle Ricerche (National Research Council of Italy) Istituto di Geoscienze e Georisorse (Institute of Geosciences and Earth Resources) UO Firenze Via G. La Pira, 4 50121 Firenze Italia
Antonio Zeoli
Museo Nazionale Antartide, Università degli Studi di Siena, via del Laterino, 8, 53100 Siena, Italy

Abstract

In this work we use analogue modelling to analyse the effect of sudden ice shelf breakup on the flow of ice draining an ice sheet grounded below sea level. Experimental results confirm that the removal of the buttressing effect exerted by the ice shelf results in significant acceleration of inland glaciers: the models show indeed a pronounced increase in ice velocity close to the grounding line. However, this effect does not significantly propagate upstream towards the internal portions of the ice sheet and rapidly decays with time. Therefore, the ice sheet is almost unaffected by flow perturbations induced by the disintegration of the ice shelf.

Article Details

Issue

Vol. 61 No. 3 (2018)

Section

Paleoclimatology

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Author Biography

Giacomo Corti, Consiglio Nazionale delle Ricerche (National Research Council of Italy) Istituto di Geoscienze e Georisorse (Institute of Geosciences and Earth Resources) UO Firenze Via G. La Pira, 4 50121 Firenze Italia

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How to Cite

(1)
Corti, G.; Zeoli, A. Analogue Modelling of the Influence of Ice Shelf Collapse on the Flow of Ice Sheets Grounded below Sea-Level. Ann. Geophys. 2018, 61 (3), OC332. https://doi.org/10.4401/ag-7356.
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