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Ice flow variations at Polar Record Glacier, East Antarctica

  • QI LIANG (a1) (a2) (a3), CHUNXIA ZHOU (a1) (a2), IAN M. HOWAT (a3) (a4), SEONGSU JEONG (a4), RUIXI LIU (a1) (a2) and YIMING CHEN (a1) (a2)...

Abstract

Relatively little is known about the physical mechanisms that drive the dynamics of the East Antarctic outlet glaciers. Here we conduct a remote-sensing investigation of the Polar Record Glacier (PRG), East Antarctica to analyze its ice flow acceleration, ice front variations and ice surface melting. Ice flow speeds at PRG increased by up to 15% from 2005 to 2015, with substantial interannual fluctuations. The ice velocities also showed seasonal variations, accelerating by up to 9% between September and January. Multiple mechanisms contribute to the observed seasonal variations: the initial acceleration may result from the lost back-stress provided by the sea ice in the austral spring and the later speedup relate to the surface meltwater that leads to weakened ice shelf and shear margins. The sensitivity of the PRG to oceanic forcing is confirmed by comparing the secular ice velocity increases with ocean temperatures. These measurements suggest that the dynamics of East Antarctic ice shelves are sensitive to melt at both the surface and base, at a range of timescales.

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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.

Corresponding author

Correspondence: Chunxia Zhou <zhoucx@whu.edu.cn>

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Present address: University of California Irvine, Irvine, CA, USA.

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References

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Ahn, Y and Howat, IM (2011) Efficient automated glacier surface velocity measurement from repeat images using multi-image/multichip and null exclusion feature tracking. IEEE Trans. Geosci. Remote Sens., 49(8), 28382846
Bindschadler, R and 17 others (2011) Getting around Antarctica: new high-resolution mappings of the grounded and freely-floating boundaries of the Antarctic ice sheet created for the International Polar Year. Cryosphere, 5, 569588
Cassotto, R, Fahnestock, M, Amundson, JM, Truffer, M and Joughin, I (2015) Seasonal and interannual variations in ice melange and its impact on terminus stability, Jakobshavn Isbræ, Greenland. J. Glaciol., 61(225), 7688
Cruwys, L and Rees, G (2001) The Polar Record Glacier. Polar Rec., 37(201), 154156
Dupont, TK and Alley, RB (2005) Assessment of the importance of ice-shelf buttressing to ice-sheet flow. Geophys. Res. Lett., 32, L04503
Dutrieux, P and 9 others (2014) Strong sensitivity of Pine Island Ice-Shelf Melting to climatic variability. Science, 343(6167), 174178
Fraser, AD, Massom, RA, Michael, KJ, Galton-Fenzi, BK and Lieser, JL (2011) East Antarctic Landfast Sea Ice distribution and variability, 2000–08. J. Clim., 25(4), 11371156
Fretwell, P and 59 others (2013) Bedmap2: improved ice bed, surface and thickness datasets for Antarctica. Cryosphere, 7, 375393
Gardner, AS and 6 others (2018) Increased West Antarctic and unchanged East Antarctic ice discharge over the last 7 years. Cryosphere, 12(2), 521547
Greene, CA, Young, DA, Gwyther, DE, Galton-Fenzi, BK and Blankenship, DD (2018) Seasonal dynamics of Totten Ice Shelf controlled by sea ice buttressing. Cryosphere, 12(9), 28692882
Herraiz-Borreguero, L and 5 others (2015) Circulation of modified Circumpolar Deep Water and basal melt beneath the Amery Ice Shelf, East Antarctica. J. Geophys. Res.-Oceans, 120, 30983112
Herraiz-Borreguero, L and 6 others (2016) Basal melt, seasonal water mass transformation, ocean current variability, and deep convection processes along the Amery Ice Shelf calving front, East Antarctica. J. Geophys. Res.-Oceans, 121, 49464965
Howat, IM and Eddy, A (2011) Multi-decadal retreat of Greenland's marine-terminating glaciers. J. Glaciol., 57(203), 389396
Howat, IM, Box, JE, Ahn, Y, Herrington, A and McFadden, EM (2010) Seasonal variability in the dynamics of marine-terminating outlet glaciers in Greenland. J. Glaciol., 56(198), 601613
Jeong, S, Howat, IM and Ahn, Y (2017) Improved multiple matching method for observing glacier motion with repeat image feature tracking. IEEE Trans. Geosci. Remote Sens., 55(4), 24312441
Khazendar, A and 5 others (2013) Observed thinning of Totten Glacier is linked to coastal polynya variability. Nat. Commun., 4, 2857
Krug, J, Durand, G, Gagliardini, O and Weiss, J (2015) Modelling the impact of submarine frontal melting and ice mélange on glacier dynamics. Cryosphere, 9(3), 9891003
Langley, ES, Leeson, AA, Stokes, CR and Jamieson, SSR (2016) Seasonal evolution of supraglacial lakes on an East Antarctic outlet glacier. Geophys. Res. Lett., 43, 85638571
Lea, JM, Mair, DWF and Rea, BR (2014) Evaluation of existing and new methods of tracking glacier terminus change. J. Glaciol., 60(220), 323332
Lenaerts, JTM and 12 others (2017) Meltwater produced by wind-albedo interaction stored in an East Antarctic ice shelf. Nat. Clim. Chang, 7, 5862
Liu, Y and 7 others (2015) Ocean-driven thinning enhances iceberg calving and retreat of Antarctic ice shelves. Proc. Natl. Acad. Sci. USA, 112(11), 32633268
Liu, T, Niu, M and Yang, Y (2017a) Ice velocity variations of the polar record glacier (East Antarctica) using a rotation-invariant feature-tracking approach. Remote. Sens. (Basel), 10(1), 42
Liu, C and 5 others (2017b) Modeling modified Circumpolar Deep Water intrusions onto the Prydz Bay continental shelf, East Antarctica. J. Geophys. Res.-Oceans, 122, 51985217
Menemenlis, D and 7 others (2008) ECCO2: high resolution global ocean and sea ice data synthesis. Mercator Ocean Quarterly Newsletter, 31, 1321
Miles, BWJ, Stokes, CR, Vieli, A and Cox, NJ (2013) Rapid, climate-driven changes in outlet glaciers on the Pacific coast of East Antarctica. Nature, 500, 563566
Miles, BWJ, Stokes, CR and Jamieson, SSR (2016) Pan–ice-sheet glacier terminus change in East Antarctica reveals sensitivity of Wilkes Land to sea-ice changes. Sci. Adv., 2(5)
Moon, T and Joughin, I (2008) Changes in ice front position on Greenland's outlet glaciers from 1992 to 2007. J. Geophys. Res., 113, F02022
Moon, T, Joughin, I and Smith, B (2015) Seasonal to multiyear variability of glacier surface velocity, terminus position, and sea ice/ice mélange in northwest Greenland. J. Geophys. Res. Earth Surf., 120(5), 818833
Mouginot, J, Scheuchl, B and Rignot, E (2012) Mapping of ice motion in Antarctica using synthetic-aperture radar data. Remote. Sens. (Basel), 4, 27532767
Mouginot, J, Rignot, E, Scheuchl, B and Millan, R (2017) Comprehensive annual ice sheet velocity mapping using Landsat-8, Sentinel-1, and RADARSAT-2 data. Remote. Sens. (Basel), 9(4), 364
Paolo, FS, Fricker, HA and Padman, L (2015) Volume loss from Antarctic ice shelves is accelerating. Science, 348(6232), 327331
Paolo, FS, Fricker, HA and Padman, L (2016) Constructing improved decadal records of Antarctic ice shelf height change from multiple satellite radar altimeters. Remote Sens. Environ., 177, 192205
Pritchard, HD and 5 others (2012) Antarctic ice-sheet loss driven by basal melting of ice shelves. Nature, 484(7395): 502505
Rignot, E, Mouginot, J and Scheuchl, B (2011) Ice flow of the Antarctic Ice sheet. Science, 333(6048), 14271430
Rignot, E, Jacobs, S, Mouginot, J and Scheuchl, B (2013) Ice-Shelf melting around Antarctica. Science, 341, 266270
Rignot, E and 5 others (2019) Four decades of Antarctic Ice Sheet mass balance from 1979–2017. Proceedings of the National Academy of Sciences, 201812883
Rintoul, SR and 6 others (2016) Ocean heat drives rapid basal melt of the Totten Ice Shelf. Sci. Adv., 2(12), e1601610
Robel, AA (2017) Thinning sea ice weakens buttressing force of iceberg mélange and promotes calving. Nat. Commun., 8, 14596
Scambos, TA, Bohlander, JA, Shuman, CA and Skvarca, P (2004) Glacier acceleration and thinning after ice shelf collapse in the Larsen B embayment, Antarctica. Geophys. Res. Lett., 31(18), L18402
Schoof, C (2007) Ice sheet grounding line dynamics: steady states, stability, and hysteresis. J. Geophys. Res. Earth Surf., 112, F03S28
Shepherd, A and 46 others (2012) A reconciled estimate of ice-sheet mass balance. Science, 338, 11831189
Spreen, G, Kaleschke, L and Heygster, G (2008) Sea ice remote sensing using AMSR-E 89-GHz channels. J. Geophys. Res.: Oceans, 113, C02S03
Strozzi, T, Luckman, A, Murray, T, Wegmuller, U and Werner, CL (2002) Glacier motion estimation using SAR offset-tracking procedures. IEEE Trans. Geosci. Remote Sens., 40(11), 23842391
The IMBIE team (2018) Mass balance of the Antarctic Ice Sheet from 1992 to 2017. Nature, 558(7709), 219222
Walter, JI and 6 others (2012) Oceanic mechanical forcing of a marine-terminating Greenland glacier. Ann. Glaciol., 53(60), 181192
Weertman, J (1974) Stability of the junction of an ice sheet and an ice shelf. J. Glaciol., 13(67), 311
Williams, GD and 11 others (2016) The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay. Nat. Commun., 7, 12577
Zhou, C and 5 others (2014) Seasonal and interannual ice velocity changes of Polar Record Glacier, East Antarctica. Ann. Glaciol., 55(66), 4551
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