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Calving and rifting on the McMurdo Ice Shelf, Antarctica

  • Alison F. Banwell (a1), Ian C. Willis (a1), Grant J. Macdonald (a2), Becky Goodsell (a3), David P. Mayer (a2) (a4), Anthony Powell (a3) and Douglas R. Macayeal (a2)...
Abstract
ABSTRACT

On 2 March 2016, several small en échelon tabular icebergs calved from the seaward front of the McMurdo Ice Shelf, and a previously inactive rift widened and propagated by ~3 km, ~25% of its previous length, setting the stage for the future calving of a ~14 km2 iceberg. Within 24 h of these events, all remaining land-fast sea ice that had been stabilizing the ice shelf broke-up. The events were witnessed by time-lapse cameras at nearby Scott Base, and put into context using nearby seismic and automatic weather station data, satellite imagery and subsequent ground observation. Although the exact trigger of calving and rifting cannot be identified definitively, seismic records reveal superimposed sets of both long-period (>10 s) sea swell propagating into McMurdo Sound from storm sources beyond Antarctica, and high-energy, locally-sourced, short-period (<10 s) sea swell, in the 4 days before the fast ice break-up and associated ice-shelf calving and rifting. This suggests that sea swell should be studied further as a proximal cause of ice-shelf calving and rifting; if proven, it suggests that ice-shelf stability is tele-connected with far-field storm conditions at lower latitudes, adding a global dimension to the physics of ice-shelf break-up.

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Copyright
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
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AF Banwell and DR MacAyeal (2015) Ice-shelf fracture due to viscoelastic flexure stress induced by fill/drain cycles of supraglacial lakes. Antarct. Sci., 27, 587597 (doi: 10.1017/S0954102015000292)

AF Banwell , DR MacAyeal and OV Sergienko (2013) Breakup of the Larsen B Ice Shelf triggered by chain reaction drainage of supraglacial lakes. Geophys. Res. Lett., 40, L02502 (doi: 10.1002/2013GL057694)

JN Bassis , HA Fricker , R Coleman and J-B Minster (2008) An investigation into the forces that drive ice-shelf rift propagation on the Amery Ice Shelf, East Antarctica. J. Glaciol., 54(184), 1727 (doi: 10.3189/002214308784409116)

PD Bromirski and RA Stephen (2012) Response of the Ross Ice Shelf, Antarcitca, to ocean gravity-wave forcing. Ann. Glaciol., 53(60), 163172 (doi: 10.3189/2012AoG60A058)

PD Bromirski , OV Sergienko and DR MacAyeal (2010) Transoceanic infragravity waves impacting Antarctic ice shelves. Geophys. Res. Lett., 37, L02502 (doi: 10.1029/2009GL041488)

LM Cathles IV, EA Okal and DR MacAyeal (2009) Seismic observations of sea swell on the floating Ross Ice Shelf, Antarctica. J. Geophys. Res., 114, F02015 (doi: 10.1029/2007JF000934)

NF Glasser and TA Scambos (2008) A structural glaciological analysis of the 2002 Larsen Ice Shelf collapse. J. Glaciol., 54(184), 316 (doi: 10.3189/002214308784409017)

NF Glasser , B Goodsell , L Copland and W Lawson (2006) Debris characteristics and ice-shelf dynamics in the ablation region of the McM Ice Shelf, Antarctica. J. Glaciol., 52(177), 223234 (doi: 10.3189/172756506781828692)

J Freed-Brown , JM Amundson , DR MacAyeal and WW Zhang (2012) Blocking a wave: frequency band gaps in ice shelves with periodic crevasses. Ann. Glaciol., 53(60), 8589 (doi: 10.3189/2012AoG60A120)

HA Fricker , JN Bassis , B Minster and DR. MacAyeal (2005) ICESat's new perspective on ice shelf rifts: The vertical dimension, Geophys. Res. Lett., 32, L23S08 (doi: 10.1029/2005GL025070)

T Hatherton and FF Evison (1962) A special mechanism for some Antarctic earthquakes. New Zealand J. Geol. Geophys., 5(5), 864873 (doi: 10.1080/00288306.1962.10417642)

S Jeong , IM Howat and JN Bassis (2016) Accelerated ice shelf rifting and retreat at Pine Island Glacier, West Antarctica. Geophys. Res. Lett., 43 (doi: 10.1002/2016GL071360)

I Joughin and DR MacAyeal (2005) Calving of large tabular icebergs from ice shelf rift systems. Geophys. Res. Lett., 32, L02501 (doi: 10.1029/2004GL020978)

A Khazendar , CP Borstad , B Scheuchl , E Rignot and H Seroussia and others (2015) The evolving instability of the remnant Larsen B Ice Shelf and its tributary glaciers. Earth Planet. Sci. Lett., 419, 199-210 (http://dx.doi.org/10.1016/j.epsl.2015.03.014)

AL Kohout , MJM Williams , SM Dean and MH Meylan (2014) Storm-induced sea-ice breakup and the implications for ice extent. Nature, 509(7502), 604607 (doi: 10.1038/nature13262)

MS Longuett-Higgins (1950) A theory of the origin of microseism. Philos. Trans. R. Soc. London, Ser. A, 243, 135

DR MacAyeal and G Holdsworth (1986) An investigation of low-stress ice rheology on the Ward-Hunt Ice Shelf. Geophys. Res. Lett., 91(B6), 63476358 (doi: 10.1029/JB091iB06p06347)

DR MacAyeal and 13 others (2006) Transoceanic wave propagation links iceberg calving margins of Antarctica with storms in tropics and Northern Hemisphere. Geophys. Res. Lett., 33, L17502 (doi: 10.1029/2006GL027235)

JA MacGregor , GA Catania , MS Markowski and AG Andrews (2012) Widespread rifting and retreat of ice-shelf margins in the eastern Amundsen Sea Embayment between 1972 and 2011. J. Glaciol., 58(209), 458466 (doi: 10.3189/2012JoG11J262)

WH Munk , GR Miller , FE Snodgrass and NF Barber (1963) Directional recording of swell from distant storms. Philos. Trans. R. Soc. London, Ser. A, 255, 505584

EA Okal and DR MacAyeal (2006) Seismic recording on drifting icebergs: catching seismic waves, tsunamis and storms from Sumatra and elsewhere. Seismol. Res. Letts., 77, 659671

W Rack , C Haas and PJ Langhorne (2013) Airborne thickness and freeboard measurements over the McM Ice Shelf, Antarctica, and implications for ice density. J. Geophys. Res. Oceans, 118, 58995907 (doi: 10.1002/2013JC009084)

AA Robel (2017) Thinning sea ice weakens buttressing force of iceberg mélange and promotes calving. Nature Com., 8, 14596 (doi: 10.1038/ncomms14596)

OV Sergienko (2010) Elastic response of floating glacier ice to impact of long-period ocean waves. J. Geophys. Res., 115, F04028 (doi: 10.1029/2010JF001721)

VA Squire (1995) The breakup of shore fast sea ice. Cold Reg. Sci. Technol., 21(3), 211218

VA Squire , JP Dugan , P Wadhams , PJ Rottier and AK Liu (1995) Of ocean waves and sea ice. Ann. Rev. Fl. Mech., 27(1), 115168

CC Walker , JN Bassis , HA Fricker and RJ Czerwinski (2013) Structural and environmental controls on Antarctic ice shelf rift propagation inferred from satellite monitoring. J. Geophys. Res.-Earth Surf. 118 (doi: 10.1002/2013JF002742)

CC Walker , JN Bassis , HA Fricker and RJ Czerwinski (2015) Observations of interannual and spatial variability in rift propagation in the Amery Ice Shelf, Antarctica, 2002–2014. J. Glaciol., 61(226), 243252 (doi: 10.3189/2015JoG14J151)

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Annals of Glaciology
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