Show simple item record

dc.contributor.authorFreed-Brown, Julian
dc.contributor.authorAmundson, Jason M.
dc.contributor.authorMacAyeal, Douglas R.
dc.contributor.authorZhang, Wendy W.
dc.date.accessioned2020-04-23T04:03:20Z
dc.date.available2020-04-23T04:03:20Z
dc.date.issued2012
dc.identifier.citationFreed-Brown, J., Amundson, J.M., MacAyeal, D.R. and Zhang, W.W., 2012. Blocking a wave: frequency band gaps in ice shelves with periodic crevasses. Annals of glaciology, 53(60), pp.85-89.en_US
dc.identifier.urihttp://hdl.handle.net/11122/11016
dc.descriptionWe assess how the propagation of high-frequency elastic-flexural waves through an ice shelf is modified by the presence of spatially periodic crevasses. Analysis of the normal modes supported by the ice shelf with and without crevasses reveals that a periodic crevasse distribution qualitatively changes the mechanical response.en_US
dc.description.abstractWe assess how the propagation of high-frequency elastic-flexural waves through an ice shelf is modified by the presence of spatially periodic crevasses. Analysis of the normal modes supported by the ice shelf with and without crevasses reveals that a periodic crevasse distribution qualitatively changes the mechanical response. The normal modes of an ice shelf free of crevasses are evenly distributed as a function of frequency. In contrast, the normal modes of a crevasse-ridden ice shelf are distributed unevenly. There are ‘band gaps’, frequency ranges over which no eigenmodes exist. A model ice shelf that is 50 km in lateral extent and 300 m thick with crevasses spaced 500 m apart has a band gap from 0.2 to 0.38 Hz. This is a frequency range relevant for ocean-wave/ice-shelf interactions. When the outermost edge of the crevassed ice shelf is oscillated at a frequency within the band gap, the ice shelf responds very differently from a crevasse-free ice shelf. The flexural motion of the crevassed ice shelf is confined to a small region near the outermost edge of the ice shelf and effectively ‘blocked’ from reaching the interior.en_US
dc.description.sponsorshipWe thank Dorian S. Abbot, Justin C. Burton, L. Mac Cathles IV, Nicholas Guttenberg and Sidney R. Nagel for encouragement and insightful feedback. This work is supported by the US National Science Foundation under grants ANT-0944193, OPP-0838811 and CMG-0934534. J.F-B. was supported by the Materials Research Science and Engineering Center at the University of Chicago (DMR- 0820054).en_US
dc.language.isoen_USen_US
dc.publisherInternational Glaciological Societyen_US
dc.subjectglaciersen_US
dc.subjectice shelvesen_US
dc.subjectcrevassesen_US
dc.subjectelastic-flexural wavesen_US
dc.subjectband gapsen_US
dc.subjectocean wave/ice shelf interactionsen_US
dc.subjectice shelfen_US
dc.titleBlocking a wave: frequency band gaps in ice shelves with periodic crevassesen_US
dc.typeArticleen_US
dc.description.peerreviewYesen_US
refterms.dateFOA2020-04-23T04:03:20Z
atmire.accessrights
dc.identifier.journalAnnals of Glaciologyen_US


Files in this item

Thumbnail
Name:
Freed-Brown et al 2012 AnnGlac ...
Size:
132.6Kb
Format:
PDF
Description:
Main Article

This item appears in the following Collection(s)

Show simple item record