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Inland advance of supraglacial lakes in north-west Greenland under recent climatic warming

  • Laura A. Gledhill (a1) and Andrew G. Williamson (a1)
Abstract
ABSTRACT

The inland advance of supraglacial lakes (SGLs) towards the interior regions of the Greenland ice sheet (GrIS) may have implications for the water volumes reaching the subglacial drainage system, and could consequently affect long-term ice-sheet dynamics. Here, we investigate changes to the areas, volumes and elevation distributions of over 8000 manually delineated SGLs using 44 Landsat images of a 6200 km2 sector of north-west Greenland over three decades (1985–2016). Our results show that SGLs have advanced to higher maximum (+418 m) and mean (+299 m) elevations, and that there has been a near-doubling of total regional SGL areas and volumes over the study period, accelerating after 2000. These changes were primarily caused by an increased SGL area and volume at high (≥1200 m a.s.l.) elevations, where SGL coverage increased by over 2750% during the study period. Many of the observed changes, particularly the post-2000 accelerations, were driven by changes to regional surface-temperature anomalies. This study demonstrates the past and accelerating response of the GrIS's hydrological system due to climatic warming, indicating an urgent need to understand whether the increasingly inland SGLs will be capable of hydrofracture in the future, thus determining their potential implications for ice-sheet dynamics.

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References
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Abdalati W and Steffen K (2001) Greenland ice sheet melt extent: 1979–1999. J. Geophys. Res.: Atmos., 106(D24), 3398333988 (doi: 10.1029/2001JD900181)
Andrews LC and 7 others (2014) Direct observations of evolving subglacial drainage beneath the Greenland ice sheet. Nature, 514(7520), 8083 (doi: 10.1038/nature13796)
Arnold NS, Banwell AF and Willis IC (2014) High-resolution modelling of the seasonal evolution of surface water storage on the Greenland ice sheet. Cryosphere, 8(4), 11491160 (doi: 10.5194/tc-8-1149-2014)
Banwell AF, Willis IC and Arnold NS (2013) Modeling subglacial water routing at Paakitsoq, W Greenland. J. Geophys. Res.: Earth Surf., 118(3), 12821295 (doi: 10.1002/jgrf.20093)
Banwell AF and 5 others (2014) Supraglacial lakes on the Larsen B ice shelf, Antarctica, and at Paakitsoq, West Greenland: a comparative study. Ann. Glaciol., 55(66), 18 (doi: 10.3189/2014AoG66A049)
Banwell A, Hewitt I, Willis I and Arnold N (2016) Moulin density controls drainage development beneath the Greenland ice sheet. J. Geophys. Res.: Earth Surf., 121(12), 22482269 (doi: 10.1002/2015jf003801)
Bartholomew I and 5 others (2010) Seasonal evolution of subglacial drainage and acceleration in a Greenland outlet glacier. Nat. Geosci., 3(6), 408411 (doi: 10.1038/ngeo863)
Bartholomew ID and 6 others (2011) Seasonal variations in Greenland ice sheet motion: inland extent and behaviour at higher elevations. Earth Planet. Sci. Lett., 307(3), 271278 (doi: 10.1016/j.epsl.2011.04.014)
Box JE and Ski K (2007) Remote sounding of Greenland supraglacial melt lakes: implications for subglacial hydraulics. J. Glaciol., 53(181), 257265 (doi: 10.3189/172756507782202883)
Box JE, Yang L, Bromwich DH and Bai LS (2009) Greenland ice sheet surface air temperature variability: 1840–2007. J. Climate, 22(14), 40294049 (doi: 10.1175/2009JCLI2816.1)
Cappelen J, Vinther BM, Kern-Hansen C, Laursen EV and Jørgensen PV (2015) Technical report 15-04: Greenland – DMI historical climate data collection 1784–2014 . Danish Meteorological Institute, Copenhagen
Catania GA, Neumann TA and Price SF (2008) Characterizing englacial drainage in the ablation zone of the Greenland ice sheet. J. Glaciol., 54(187), 567578 (doi: 10.3189/002214308786570854)
Chandler DM and 10 others (2013) Evolution of the subglacial drainage system beneath the Greenland ice sheet revealed by tracers. Nat. Geosci., 6(3), 195198 (doi: 10.1038/ngeo1737)
Church JA and 13 others (2013) Sea level change. In Stocker TF and 9 others eds. Climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, UK and New York, NY, USA, 11371216 (doi: 10.1017/CBO9781107415324)
Colgan W and 7 others (2011) An increase in crevasse extent, West Greenland: hydrologic implications. Geophys. Res. Lett., 38, L18503 (doi: 10.1029/2011GL048491)
Collins M and 13 others (2013) Long-term climate change: projections, commitments and irreversibility. In Stocker TF and 9 others eds. Climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, UK and New York, NY, USA, 10291136 (doi: 10.1017/CBO9781107415324)
Cowton T and 7 others (2013) Evolution of drainage system morphology at a land-terminating Greenlandic outlet glacier. J. Geophys. Res.: Earth Surf., 118(1), 2941 (doi: 10.1029/2012jf002540)
Das SB and 6 others (2008) Fracture propagation to the base of the Greenland ice sheet during supraglacial lake drainage. Science, 320(5877), 778781 (doi: 10.1126/science.1153360)
Dow CF, Kulessa B, Rutt IC, Doyle SH and Hubbard A (2014) Upper bounds on subglacial channel development for interior regions of the Greenland ice sheet. J. Glaciol., 60(224), 10441052 (doi: 10.3189/2014JoG14J093)
Dow CF and 10 others (2015) Modeling of subglacial hydrological development following rapid supraglacial lake drainage. J. Geophys. Res.: Earth Surf., 120(6), 11271147 (doi: 10.1002/2014jf003333)
Doyle SH and 9 others (2013) Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland ice sheet. Cryosphere, 7(1), 129140 (doi: 10.5194/tc-7-129-2013)
Doyle SH and 6 others (2014) Persistent flow acceleration within the interior of the Greenland ice sheet. Geophys. Res. Lett., 41(3), 899905 (doi: 10.1002/2013GL058933)
Echelmeyer K, Clarke TS and Harrison WD (1991) Surficial glaciology of Jakobshavns Isbræ, West Greenland: part I. Surface morphology. J. Glaciol., 37(127), 368382 (doi: 10.1017/S0022143000005803)
Enderlin EM and 5 others (2014) An improved mass budget for the Greenland ice sheet. Geophys. Res. Lett., 41(3), 866872 (doi: 10.1002/2013GL059010)
Everett A and 10 others (2016) Annual down-glacier drainage of lakes and water-filled crevasses at Helheim glacier, southeast Greenland. J. Geophys. Res.: Earth Surf., 121(10), 18191833 (doi: 10.1002/2016JF003831)
Fettweis X, Tedesco M, van den Broeke M and Ettema J (2011) Melting trends over the Greenland ice sheet (1958–2009) from spaceborne microwave data and regional climate models. Cryosphere, 5(2), 359375 (doi: 10.5194/tc-5-359-2011)
Fettweis X and 5 others (2013) Brief communication: “Important role of the mid-tropospheric atmospheric circulation in the recent surface melt increase over the Greenland ice sheet”. Cryosphere, 7(1), 241248 (doi: 10.5194/tc-7-241-245013)
Fitzpatrick AAW and 9 others (2014) A decade (2002–2012) of supraglacial lake volume estimates across Russell glacier, west Greenland. Cryosphere, 8(1), 107121 (doi: 10.5194/tc-8-107-2014)
Georgiou S, Shepherd A, McMillan M and Nienow P (2009) Seasonal evolution of supraglacial lake volume from ASTER imagery. Ann. Glaciol., 50(52), 95100 (doi: 10.3189/172756409789624328)
Gudmundsson GH (2003) Transmission of basal variability to a glacier surface. J. Geophys. Res.: Solid Earth, 108(B5), 2253 (doi: 10.1029/2002JB002107)
Hall DK, Williams RS, Luthcke SB and Digirolamo NE (2008) Greenland ice sheet surface temperature, melt and mass loss: 2000–06. J. Glaciol., 54(184), 8193 (doi: 10.3189/002214308784409170)
Hanna E and 8 others (2008) Increased runoff from melt from the Greenland ice sheet: a response to global warming. J. Climate, 21(2), 331341 (doi: 10.1175/2007JCLI1964.1)
Hanna E, Mernild SH, Cappelen J and Steffen K (2012) Recent warming in Greenland in a long-term instrumental (1881–2012) climatic context: I. Evaluation of surface air temperature records. Environ. Res. Lett., 7(4), 045404 (doi: 10.1088/1748-9326/7/4/045404)
Helm V, Humbert A and Miller H (2014) Elevation and elevation change of Greenland and Antarctica derived from CryoSat-2. Cryosphere, 8(4), 15391559 (doi: 10.5194/tc-8-1539-2014)
Hoffman MJ, Catania GA, Neumann TA, Andrews LC and Rumrill JA (2011) Links between acceleration, melting, and supraglacial lake drainage of the western Greenland ice sheet. J. Geophys. Res.: Earth Surf., 116(F4) (doi: 10.1029/2010JF001934)
Howat IM, de la Peña S, van Angelen JH, Lenaerts TM and van den Broeke MR (2013) Brief communication: “Expansion of meltwater lakes on the Greenland ice sheet”. Cryosphere, 7(1), 201204 (doi: 10.5194/tc-7-201-2013)
Howat IM, Negrete A and Smith BE (2014) The Greenland ice mapping project (GIMP) land classification and surface elevation data sets. Cryosphere, 8(4), 15091518 (doi: 10.5194/tc-8-1509-2014)
Ignéczi A and 7 others (2016) Northeast sector of the Greenland ice sheet to undergo the greatest inland expansion of supraglacial lakes during the 21st century. Geophys. Res. Lett., 43(18), 97299738 (doi: 10.1002/2016GL070338)
Johansson AM and Brown IA (2013) Adaptive classification of supra-glacial lakes on the west Greenland ice sheet. IEEE J. Sel. Topics. Appl. Earth Observ. in Remote Sens., 6(4), 19982007 (doi: 10.1109/JSTARS.2012.2233722)
Johansson AM, Jansson P and Brown IA (2013) Spatial and temporal variations in lakes on the Greenland ice sheet. J. Hydrol., 476, 314320 (doi: 10.1016/j.jhydrol.2012.10.045)
Joughin I and 5 others (2008) Seasonal speedup along the western flank of the Greenland ice sheet. Science, 320(5877), 781783 (doi: 10.1126/science.1153288)
Kobashi T and 7 others (2011) High variability of Greenland surface temperature over the past 4000 years estimated from trapped air in an ice core. Geophys. Res. Lett., 38(21) (doi: 10.1029/2011GL049444)
Koziol C, Arnold N, Pope A and Colgan W (2017) Quantifying supraglacial meltwater pathways in the Paakitsoq region, West Greenland. J. Glaciol., 63(239), 464476 (doi: 10.1017/jog.2017.5)
Krabill W and 12 others (2004) Greenland ice sheet: increased coastal thinning. Geophys. Res. Lett., 31(24) (doi: 10.1029/2004GL021533)
Krawczynski MJ, Behn MD, Das SB and Joughin I (2009) Constraints on the lake volume required for hydro-fracture through ice sheets. Geophys. Res. Lett., 36(10) (doi: 10.1029/2008GL036765)
Lampkin DJ (2011) Supraglacial lake spatial structure in western Greenland during the 2007 ablation season. J. Geophys. Res.: Earth Surf., 116(F4) (doi: 10.1029/2010JF001725)
Lampkin DJ and VanderBerg J (2011) A preliminary investigation of the influence of basal and surface topography on supraglacial lake distribution near Jakobshavn Isbrae, western Greenland. Hydrol. Process., 25(21), 33473355 (doi: 10.1002/hyp.8170)
Langley ES, Leeson AA, Stokes CR and Jamieson SS (2016) Seasonal evolution of supraglacial lakes on an East Antarctic outlet glacier. Geophys. Res. Lett., 43(16), 85638571 (doi: 10.1002/2016GL069511)
Leeson AA and 7 others (2013) A comparison of supraglacial lake observations derived from MODIS imagery at the western margin of the Greenland ice sheet. J. Glaciol., 59(218), 11791188 (doi: 10.3189/2013JoG13J064)
Leeson AA and 6 others (2015) Supraglacial lakes on the Greenland ice sheet advance inland under warming climate. Nat. Clim. Change, 5(1), 5155 (doi: 10.1038/nclimate2463)
Liang Y and 7 others (2012) A decadal investigation of supraglacial lakes in West Greenland using a fully automatic detection and tracking algorithm. Remote Sens. Environ., 123, 127138 (doi: 10.1016/j.rse.2012.03.020)
Lüthje M, Pedersen LT, Reeh N and Greuell W (2006) Modelling the evolution of supraglacial lakes on the West Greenland ice-sheet margin. J. Glaciol., 52(179), 608618 (doi: 10.3189/172756506781828386)
Mayaud JR, Banwell AF, Arnold NS and Willis IC (2014) Modeling the response of subglacial drainage at Paakitsoq, west Greenland, to 21st century climate change. J. Geophys. Res.: Earth Surf., 119, 26192634 (doi: 10.1002/2014JF003271)
McMillan M, Nienow P, Shepherd A, Benham T and Sole A (2007) Seasonal evolution of supra-glacial lakes on the Greenland ice sheet. Earth Planet. Sci. Lett., 262(3), 484492 (doi: 10.1016/j.epsl.2007.08.002)
McMillan M and 14 others (2016) A high-resolution record of Greenland mass balance. Geophys. Res. Lett., 43(13), 70027010 (doi: 10.1002/2016GL069666)
Meierbachtol T, Harper J and Humphrey N (2013) Basal drainage system response to increasing surface melt on the Greenland ice sheet. Science, 341(6147), 777779 (doi: 10.1126/science.1235905)
Miles KE, Willis IC, Benedek CL, Williamson AG and Tedesco M (2017) Toward monitoring surface and subsurface lakes on the Greenland ice sheet using sentinel-1 SAR and landsat-8 OLI imagery. Front. Earth Sci., 5(58), 117 (doi: 10.3389/feart.2017.00058)
Moon T and 6 others (2014) Distinct patterns of seasonal Greenland glacier velocity. Geophys. Res. Lett., 41(20), 72097216 (doi: 10.1002/2014GL061836)
Morriss BF and 7 others (2013) A ten-year record of supraglacial lake evolution and rapid drainage in West Greenland using an automated processing algorithm for multispectral imagery. Cryosphere, 7(6), 18691877 (doi: 10.5194/tc-7-1869-2013)
Moussavi MS and 6 others (2016) Derivation and validation of supraglacial lake volumes on the Greenland ice sheet from high-resolution satellite imagery. Remote Sens. Environ., 183, 294303 (doi: 10.1016/j.rse.2016.05.024)
Noël B and 6 others (2016) A daily, 1-km resolution data set of downscaled Greenland ice sheet mass balance (1958–2015). Cryosphere, 10, 23612377 (doi: 10.5194/tc-10-2361-2016)
Ohmura A and Reeh N (1991) New precipitation and accumulation maps for Greenland. J. Glaciol., 37(125), 140148 (doi: 10.1017/S0022143000042891)
Palmer S, Shepherd A, Nienow P and Joughin I (2011) Seasonal speedup of the Greenland ice sheet linked to routing of surface water. Earth Planet. Sci. Lett., 302, 423428 (doi: 10.1016/j.epsl.2010.12.037)
Phillips T, Rajaram H and Steffen K (2010) Cryo-hydrologic warming: a potential mechanism for rapid thermal response of ice sheets. Geophys. Res. Lett., 37(20) (doi: 10.1029/2010GL044397)
Phillips T, Rajaram H, Colgan W, Steffen K and Abdalati W (2013) Evaluation of cryo-hydrologic warming as an explanation for increased ice velocities in the wet snow zone, Sermeq Avannarleq, West Greenland. J. Geophys. Res.: Earth Surf., 118(3), 12411256 (doi: 10.1002/jgrf.20079)
Poinar K and 5 others (2015) Limits to future expansion of surface-melt-enhanced ice flow into the interior of western Greenland. Geophys. Res. Lett., 42(6), 18001807 (doi: 10.1002/2015GL063192)
Pope A (2016) Reproducibly estimating and evaluating supraglacial lake depth with Landsat 8 and other multispectral sensors. Earth Space Sci., 3, 176188 (doi: 10.1002/2015EA000125)
Pope A and 6 others (2016) Estimating supraglacial lake depth in West Greenland using Landsat 8 and comparison with other multispectral methods. Cryosphere, 10, 1527 (doi: 10.5194/tc-10-15-2016)
Pritchard HD, Arthern RJ, Vaughan DG and Edwards LA (2009) Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets. Nature, 461(7266), 971975 (doi: 10.1038/nature08471)
Raymond CF and Nolan M (2000) Drainage of a glacial lake through an ice spillway. IAHS Publ., 264, 199210
Rignot E and Kanagaratnam P (2006) Changes in the velocity structure of the Greenland ice sheet. Science, 311(5763), 986990 (doi: 10.1126/science.1121381)
Schoof C (2010) Ice-sheet acceleration driven by melt supply variability. Nature, 468(7325), 803806 (doi: 10.1038/nature09618)
Selmes N, Murray T and James TD (2011) Fast draining lakes on the Greenland ice sheet. Geophys. Res. Lett., 38(15) (doi: 10.1029/2011GL047872)
Selmes N, Murray T and James TD (2013) Characterizing supraglacial lake drainage and freezing on the Greenland ice sheet. Cryos. Discuss., 7(1), 475505 (doi: 10.5194/tcd-7-475-2013)
Shepherd A and 5 others (2009) Greenland ice sheet motion coupled with daily melting in late summer. Geophys. Res. Lett., 36(1) (doi: 10.1029/2008GL035758)
Sneed WA and Hamilton GS (2007) Evolution of melt pond volume on the surface of the Greenland ice sheet. Geophys. Res. Lett., 34(3) (doi: 10.1029/2006GL028697)
Sole A and 6 others (2013) Winter motion mediates dynamic response of the Greenland ice sheet to warmer summers. Geophys. Res. Lett., 40(15), 39403944 (doi: 10.1002/grl.50764)
Stevens LA and 7 others (2015) Greenland supraglacial lake drainages triggered by hydrologically induced basal slip. Nature, 522(7554), 7376 (doi: 10.1038/nature14608)
Sundal AV and 5 others (2009) Evolution of supra-glacial lakes across the Greenland ice sheet. Remote Sens. Environ., 113(10), 21642171 (doi: 10.1016/j.rse.2009.05.018)
Sundal AV and 5 others (2011) Melt-induced speed-up of Greenland ice sheet offset by efficient subglacial drainage. Nature, 469(7331), 521524 (doi: 10.1038/nature09740)
Tedesco M and 7 others (2012) Measurement and modeling of ablation of the bottom of supraglacial lakes in western Greenland. Geophys. Res. Lett., 39(2), L02052 (doi: 10.1029/2011GL049882)
Tedesco M and 5 others (2013) Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet. Environ. Res. Lett., 8(3), 034007 (doi: 10.1088/1748-9326/8/3/034007)
Tedstone AJ, Nienow PW, Gourmelen N and Sole AJ (2014) Greenland ice sheet annual motion insensitive to spatial variations in subglacial hydraulic structure. Geophys. Res. Lett., 41(24), 89108917 (doi: 10.1002/2014GL062386)
Tedstone AJ and 5 others (2015) Decadal slowdown of a land-terminating sector of the Greenland ice sheet despite warming. Nature, 526(7575), 692695 (doi: 10.1038/nature15722)
Thomsen HH, Thorning L and Braithwaite RJ (1988) Glacier-hydrological conditions on the Inland Ice north-east of Jakobshavn/Ilulissat, West Greenland: 1:75 000 scale map with explanation on reverse side. Rapport Grønlands Geologiske Undersøgelse, 138
van de Wal RS and 6 others (2008) Large and rapid melt-induced velocity changes in the ablation zone of the Greenland ice sheet. Science, 321(5885), 111113 (doi: 10.1126/science.1158540)
van de Wal RS and 10 others (2015) Self-regulation of ice flow varies across the ablation area in south-west Greenland. Cryosphere, 9(2), 603611 (doi: 10.5194/tc-9-603-2015)
Vaughan DG and 13 others (2013) Observations: cryosphere. In Stocker TF and 9 others eds. Climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, UK and New York, NY, USA, 317382 (doi: 10.1017/CBO9781107415324)
Weisberg S (2005) Applied linear regression, 3rd edn. John Wiley and Sons, Hoboken (doi: 10.1002/0471704091)
Williamson AG, Arnold NS, Banwell AF and Willis IC (2017) A fully automated supraglacial lake area and volume tracking (“FAST”) algorithm: development and application using MODIS imagery of West Greenland. Remote Sens. Environ., 196, 113133 (doi: 10.1016/j.rse.2017.04.032)
Yang K and Smith LC (2013) Supraglacial streams on the Greenland ice sheet delineated from combined spectral–shape information in high-resolution satellite imagery. IEEE Geosci. Remote Sens. Lett., 10(4), 801805 (doi: 10.1109/LGRS.2012.2224316)
Yang K, Smith LC, Chu VW, Gleason CJ and Li M (2015) A caution on the use of surface digital elevation models to simulate supraglacial hydrology of the Greenland ice sheet. IEEE J. Sel. Topics. Appl. Earth Observ. in Remote Sens., 8(11), 52125224 (doi: 10.1109/JSTARS.2015.2483483)
Zwally HJ and 7 others (2005) Mass changes of the Greenland and Antarctic ice sheets and shelves and contributions to sea-level rise: 1992–2002. J. Glaciol., 51(175), 509527 (doi: 10.3189/172756505781829007)
Zwally HJ and 11 others (2011) Greenland ice sheet mass balance: distribution of increased mass loss with climate warming; 2003–07 versus 1992–2002. J. Glaciol., 57(201), 88102 (doi: 10.3189/002214311795306682)
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