Treatment of ice-shelf evolution combining flow and flexure

MacAyeal, Douglas R.; Sergienko, Olga V.; Banwell, Alison F.; Macdonald, Grant J.; Willis, Ian C.; Stevens, Laura A.

doi:10.1017/jog.2021.39

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i

Treatment of ice-shelf evolution combining flow and flexure

2021
By MacAyeal, Douglas R. ; Sergienko, Olga V. ; Banwell, Alison F. ; ...
Source: Journal of Glaciology, 67(265), 885-902

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Journal Title:

Journal of Glaciology
Personal Author:

MacAyeal, Douglas R. ; Sergienko, Olga V. ; Banwell, Alison F. ; Macdonald, Grant J. ; Willis, Ian C. ; ... More +

MacAyeal, Douglas R. ; Sergienko, Olga V. ; Banwell, Alison F. ; Macdonald, Grant J. ; Willis, Ian C. ; Stevens, Laura A. Less -
NOAA Program & Office:

CIMES (Cooperative Institute for Modeling the Earth System) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; OAR (Oceanic and Atmospheric Research)

CIMES (Cooperative Institute for Modeling the Earth System) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; OAR (Oceanic and Atmospheric Research) Less -
Description:

We develop a two-dimensional, plan-view formulation of ice-shelf flow and viscoelastic ice-shelf flexure. This formulation combines, for the first time, the shallow-shelf approximation for horizontal ice-shelf flow (and shallow-stream approximation for flow on lubricated beds such as where ice rises and rumples form), with the treatment of a thin-plate flexure. We demonstrate the treatment by performing two finite-element simulations: one of the relict pedestalled lake features that exist on some debris-covered ice shelves due to strong heterogeneity in surface ablation, and the other of ice rumpling in the grounding zone of an ice rise. The proposed treatment opens new venues to investigate physical processes that require coupling between the longitudinal deformation and vertical flexure, for instance, the effects of surface melting and supraglacial lakes on ice shelves, interactions with the sea swell, and many others.
Keywords:

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Glaciology Sea Ice
Source:

Journal of Glaciology, 67(265), 885-902
DOI:

https://doi.org/10.1017/jog.2021.39
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4320123
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CC BY-NC-ND
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Submitted
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urn:sha256:0ee8c3554fdc8a649908228a73b067c7f84e13282d496492b6f82e740a03efdf
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https://repository.library.noaa.gov/view/noaa/43148/noaa_43148_DS1.pdf
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Treatment of ice-shelf evolution combining flow and flexure

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