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Using radar-sounding data to identify the distribution and sources of subglacial water: application to Dome C, East Antarctica

  • Sasha Peter Carter (a1) (a2), Donald D. Blankenship (a2), Duncan A. Young (a2) and John W. Holt (a2)


Basal radar reflectivity is the most important measurement for the detection of subglacial water. However, dielectric loss in the overlying ice column complicates the determination of basal reflectivity. Dielectric attenuation is a function of ice temperature and impurity concentration. Temperature distribution is a function of climate history, basal heat flow and vertical strain rate, all of which can be partially inferred from the structure of dated internal layers. Using 11 dated layers, isotope records from Dome C, East Antarctica, and a model of the spatial variation of geothermal flux, we calculate the vertical strain rate and accumulation-rate history, allowing identification of areas where the basal melt rate exceeds 1.5 mm a−1. The accumulation-rate history and vertical strain rates are then used as inputs for a transient temperature model. The model outputs for the present-day temperature distribution are then combined with depth-dependent ionic concentrations to model dielectric loss and infer basal reflectivity. The resulting reflection coefficients are consistent (∼−5 dB) across a variety of subglacial water bodies. We also identify a high reflectivity >−15 dB in Concordia Trench and along suspected subglacial water-flow routes in Vincennes Basin. Highland areas tend to have highly variable reflection coefficients near −30 dB, consistent with an ice–bedrock interface. This combined model also identifies three areas of enhanced basal melting along Concordia Ridge, Concordia Subglacial Lake and Vincennes Basin. Melt at Concordia Subglacial Lake exceeds 5 mm a−1. The inferred basal melt at these locations is not possible without enhanced geothermal flux. We demonstrate how radar-sounding data can provide both input and verification for a self-consistent model of vertical strain, vertical temperature distribution and meltwater distribution.

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Arthern, R.J., Winebrenner, D.P. and Vaughan, D.G.. 2006. Antarctic snow accumulation mapped using polarization of 4.3cm wavelength microwave emission. J. Geophys. Res., 111(D6), D06107. (10.1029/2004JD005667.)
Bamber, J.L., Vaughan, D.G. and Joughin, I.. 2000. Widespread complex flow in the interior of the Antarctic ice sheet. Science, 287(5456), 12481250.
Bell, R.E. 2008. The role of subglacial water in ice-sheet mass balance. Nature Geosci, 1(5), 297304.
Bell, R.E., Studinger, M., Tikku, A.A., Clarke, G.K.C., Gutner, M.M. and Meertens, C.. 2002. Origin and fate of Lake Vostok water frozen to the base of the East Antarctic ice sheet. Nature, 416(6878), 307310.
Bianchi, C., Forieri, A. and Tabacco, I.E.. 2004. Electromagnetic reflecting properties of sub-ice surfaces. Ann. Glaciol., 39, 912.
Blankenship, D.D., Bell, R.E., Hodge, S.M., Brozena, J.M., Behrendt, J.C. and Finn, C.A.. 1993. Active volcanism beneath the West Antarctic ice sheet and implications for ice-sheet stability. Nature, 361(6412), 526529.
Blankenship, D.D. and 9 others. 2001. Geologic controls on the initiation of rapid basal motion for West Antarctic ice streams: a geophysical perspective including new airborne radar sounding and laser altimetry results. In Alley, R.B. and Bindschadler, R.A., eds. The West Antarctic ice sheet: behavior and environment. Washington, DC, American Geophysical Union, 105121. (Antarctic Research Series 77.)
Buchardt, S. and Dahl-Jensen, D.. 2007. Estimating the basal melt rate at NorthGRIP using a Monte Carlo technique. Ann. Glaciol., 45, 137142.
Carter, S.P. 2008. Evolving subglacial water systems in East Antarctica from airborne radar sounding. (PhD thesis, University of Texas at Austin.)
Carter, S.P., Blankenship, D.D., Peters, M.F., Young, D.A., Holt, J.W. and Morse, D. L.. 2007. Radar-based subglacial lake classification in Antarctica. Geochem. Geophys. Geosyst., 8(3), Q03016. (10.1029/2006GC001408.)
Carter, S.P., Blankenship, D.D., Young, D.A., Peters, M.E., Holt, J.W. and Siegert, M.J.. 2009. Dynamic distributed drainage implied by the flow evolution of the 1996–1998 Adventure Trench sub-glacial outburst flood. Earth Planet. Sci. Lett., 283(1–4), 2437.
Corr, H., Moore, J.C. and Nicholls, K.W.. 1993. Radar absorption due to impurities in Antarctic ice. Geophys. Res. Lett., 20(11), 10711074.
Dahl-Jensen, D., Gundestrup, N., Gogineni, S.P. and Miller, H.. 2003. Basal melt at NorthGRIP modeled from borehole, ice-core and radio-echo sounder observations. Ann. Glaciol., 37, 207212.
Dalziel, I.W.D. 1992. Anatarctica; a tale of two supercontinents? Annu. Rev. Earth Planet. Sci., 20, 501546.
Danque, H.-W.A. 2008. Subglacial West Antarctic volcanoes defined by aerogeophysical data and the potential for associated hydrothermal systems. (MS thesis, University of Texas at Austin.)
Dansgaard, W. and Johnsen, S.J.. 1969. A flow model and a time scale for the ice core from Camp Century, Greenland. J. Glaciol., 8(53), 215223.
Doebbler, J.A., Blankenship, D.D., Morse, D.L. and Peters, M.E.. 2001. A model for the dielectric absorption of the central West Antarctic ice sheet at radar sounding frequencies. In Clifford, S.M., George, J. and Stoker, C.R., eds. Conference on Geophysical Detection of Subsurface Water on Mars, 6–10 August 2001, Houston, Texas. Abstract volume LPI Contribution Report. Houston, TX, Lunar and Planetary Institute, 1095, 38.
Dowdeswell, J.A. and Siegert, M.J.. 1999. The dimensions and topographic setting of Antarctic subglacial lakes and implications for large-scale water storage beneath continental ice sheets. Geol. Soc. Am. Bull., 111(2), 254263.
EPICA Community Members. 2004. Eight glacial cycles from an Antarctic ice core. Nature, 429(6992), 623628.
Evatt, G.W., Fowler, A.C., Clark, C.D. and Hulton, N.R.J.. 2006. Subglacial floods beneath ice sheets. Philos. Trans. R. Soc. London, Ser. A, 364(1844), 17691794.
Fahnestock, M., Abdalati, W., Joughin, I., Brozena, J. and Gogineni, P.. 2001. High geothermal heat flow, basal melt, and the origin of rapid ice flow in central Greenland. Science, 294(5550), 23382342.
Forieri, A., Zuccoli, L., Bini, A., Zirizzotti, A., Rémy, F. and Tabacco, I.E.. 2004. New bedrock map of Dome C and morphostructural interpretation of the area. Ann. Glaciol., 39, 321325.
Fox Maule, C., Purucker, M.E., Olsen, N. and Mosegaard, K.. 2005. Heat flux anomalies in Antarctica revealed by satellite magnetic data. Science, 309(5733), 464467.
Frezzotti, M., Gandolfi, S., La Marca, F. and Urbini, S.. 2002. Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data. Ann. Glaciol., 34, 8188.
Fujita, S. and Mae, S.. 1994. Strain in the ice sheet deduced from the crystal-orientation fabrics from bare icefields adjacent to the Sør-Rondane Mountains, Dronning Maud Land, East Antarctica. J. Glaciol., 40(134), 135139.
Gudmandsen, P.E. 1971. Electromagnetic probing of ice. In Wait, J.R., ed. Electromagnetic probing in geophysics. Boulder, CO, Golem Press, 321348.
Hindmarsh, R.C.A., Leysinger Vieli, G.J.M., Raymond, M.J. and Gudmundsson, G.H.. 2006. Draping or overriding: the effect of horizontal stress gradients on internal layer architecture in ice sheets. J. Geophys. Res., 111(F2), F02018. (10.1029/2005JF000309.)
Huybrechts, P. 2002. Sea-level changes at the LGM from ice-dynamic reconstructions of the Greenland and Antarctic ice sheets during the glacial cycles. Quat. Sci. Rev., 21(1–3), 203231.
Jacobel, R.W. and Anderson, S.K.. 1987. Interpretation of radio-echo returns from internal water bodies in Variegated Glacier, Alaska, U.S.A. J. Glaciol., 33(115), 319323.
Johnson, J.V. 2002. A basal water model for ice sheets. (PhD thesis, University of Maine.)
Le Brocq, A.M., Payne, A.J. and Siegert, M.J.. 2006. West Antarctic balance calculations: impact of flux-routing algorithm, smoothing algorithm and topography. Comput. Geosci., 32(10), 17801795.
Legrésy, B., Rignot, E. and Tabacco, I.E.. 2000. Constraining ice dynamics at Dome C, Antarctica, using remotely sensed measurements. Geophys. Res. Lett., 27(21), 34933496.
Leonard, K., Bell, R.E., Studinger, M. and Tremblay, B.. 2004. Anomalous accumulation rates in the Vostok ice-core resulting from ice flow over Lake Vostok. Geophys. Res. Lett., 31(2) L24401. (10.1029/2004GL021102.)
Leysinger Vieli, G.J.M., Siegert, M.J. and Payne, A.J.. 2004. Reconstructing ice sheet accumulation rates at ridge B, East Antarctica. Ann. Glaciol., 39, 326330.
Lythe, M.B., Vaughan, D.G. and BEDMAP consortium. 2001. BEDMAP: a new ice thickness and subglacial topographic model of Antarctica. J. Geophys. Res., 106(B6), 11,33511,351.
MacGregor, J.A., Winebrenner, D.P., Conway, H., Matsuoka, K., Mayewski, P.A. and Clow, G.D.. 2007. Modeling englacial radar attenuation at Siple Dome, West Antarctica, using ice chemistry and temperature data. J. Geophys. Res., 112(F3), F03008. (10.1029/2006JF000717.)
MacGregor, J.A., Matsuoka, K., Koutnik, M.R., Waddington, E.D., Studinger, M. and Winebrenner, D.P.. 2009. Millennially averaged accumulation rates for the Vostok Subglacial Lake region inferred from deep internal layers. Ann. Glaciol., 50(51), 2534.
Magand, O., Frezzotti, M., Pourchet, M., Stenni, B., Genoni, L. and Fily, M.. 2004. Climate variability along latitudinal and longitudinal transects in East Antarctica. Ann. Glaciol., 39, 351358.
Masson-Delmotte, V. and 12 others. 2006. Past temperature reconstructions from deep ice cores: relevance for future climate change. Climate Past, 2(2), 145165.
Matsuoka, K., Thorsteinsson, T., Björnsson, H. and Waddington, E.D.. 2007. Anisotropic radio-wave scattering from englacial water regimes, Mÿrdalsjökull, Iceland. J. Glaciol., 53(182), 473478.
McLaren, S., Sandiford, M. and Powell, R.. 2005. Contrasting styles of Proterozoic crustal evolution: a hotplate tectonic model for Australian terranes. Geology, 33(8), 673676.
Morse, D.L., Blankenship, D.D., Waddington, E.D. and Neumann, T.A.. 2002. A site for deep ice coring in West Antarctica: results from aerogeophysical surveys and thermokinematic modeling. Ann. Glaciol., 35, 3644.
Morse, D.L., Waddington, E.D. and Rasmussen, L.A.. 2007. Ice deformation in the vicinity of the ice-core site at Taylor Dome, Antarctica, and a derived accumulation rate history. J. Glaciol., 53(182), 449460.
Nye, J.F. 1963. Correction factor for accumulation measured by the thickness of the annual layers in an ice sheet. J. Glaciol., 4(36), 785788.
Oswald, G.K.A. and Robin, Q.. 1973. Lakes beneath the Antarctic ice sheet. Nature, 245(5423), 251254.
Parrenin, F. and 15 others. 2007. 1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica. Climate Past, 3(2), 243259.
Paterson, W.S.B. 1994. The physics of glaciers. Third edition. Oxford, etc., Elsevier.
Peters, M.E., Blankenship, D.D. and Morse, D.L.. 2005. Analysis techniques for coherent airborne radar sounding: application to West Antarctic ice streams. J. Geophys. Res., 110(B6), B06303. (10.1029/2004JB003222.)
Peters, M.E., Blankenship, D.D., Carter, S.P., Kempf, S.D., Young, D.A. and Holt, J.W.. 2007. Along-track focusing of airborne radar sounding data from West Antarctica for improving basal reflection analysis and layer detection. IEEE Trans. Geosci. Remote Sens., 45(9), 27252736.
Rémy, F., Testut, L., Legrésy, B., Forieri, A., Bianchi, C. and Tabacco, I.E.. 2003. Lakes and subglacial hydrological networks around Dome C, East Antarctica. Ann. Glaciol., 37, 252256.
Ridley, J.K., Cudlip, W. and Laxon, S.W.. 1993. Identification of subglacial lakes using ERS-1 radar altimeter. J. Glaciol., 39(133), 625634.
Rippin, D.M., Siegert, M.J. and Bamber, J.L.. 2003. The englacial stratigraphy of Wilkes Land, East Antarctica, as revealed by internal radio-echo sounding layering, and its relationship with balance velocities. Ann. Glaciol., 36, 189196.
Robin, Q. and Millar, D.H.M.. 1982. Flow of ice sheets in the vicinity of subglacial peaks. Ann. Glaciol., 3, 290294.
Röthlisberger, R. and 8 others. 2003. Limited dechlorination of sea salt aerosols during the last glacial period: evidence from the EPICA Dome C ice core. J. Geophys. Res., 108(D16), 4256. (10.1029/2003JD003604.)
Shapiro, N.M. and Ritzwoller, M.H.. 2004. Inferring surface heat flux distribution guided by a global seismic model: particular application to Antarctica. Earth Planet. Sci. Lett., 233(1–2), 213224.
Siegert, M.J. 1999. On the origin, nature and uses of Antarctic ice-sheet radio-echo layering. Progr. Phys. Geogr., 23(2), 159179.
Siegert, M.J. 2000. Antarctic subglacial lakes. Earth-Sci. Rev., 50(1–2), 2950.
Siegert, M.J., Dowdeswell, J.A., Gorman, M.R. and McIntyre, N.F.. 1996. An inventory of Antarctic sub-glacial lakes. Antarct. Sci., 8(3), 281286.
Siegert, M.J., Eyers, R.D. and Tabacco, I.E.. 2001. Three-dimensional ice sheet structure at Dome C, central East Antarctica: implications for the interpretation of the EPICA ice core. Antarct. Sci., 13(2), 182187.
Siegert, M.J., Hindmarsh, R. and Hamilton, G.. 2003. Evidence for a large surface ablation zone in central East Antarctica during the last Ice Age. Quat. Res., 59(1), 114121.
Siegert, M.J., Carter, S., Tabacco, I., Popov, S. and Blankenship, D.D.. 2005. A revised inventory of Antarctic subglacial lakes. Antarct. Sci., 17(3), 453460.
Studinger, M., Bell, R.E., Buck, W.R., Karner, G.D. and Blankenship, D.D.. 2004. Sub-ice geology inland of the Transantarctic Mountains in light of aerogeophysical data. Earth Planet. Sci. Lett., 220(3–4), 391408.
Tabacco, I.E., Passerini, A., Corbelli, F. and Gorman, M.R.. 1998. Determination of the surface and bed topography at Dome C, East Antarctica. J. Glaciol., 44(146), 185191.
Tabacco, I.E., Cianfarra, P., Forieri, A., Salvini, F. and Zirizzotti, A.. 2006. Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica subglacial highlands (Antarctica). Geophys. J. Int., 165(3), 10291040.
Thoma, M., Mayer, C. and Grosfeld, K.. 2008. Sensitivity of subglacial Lake Vostok’s flow regime on environmental parameters. Earth Planet. Sci. Lett., 269(1–2), 242247.
Tikku, A.A., Bell, R.E., Studinger, M., Clarke, G.K.C., Tabacco, I. and Ferraccioli, F.. 2005. Influx of meltwater to subglacial Lake Concordia, East Antarctica. J. Glaciol., 51(172), 96104.
Van der Veen, C.J., Leftwich, T., von Frese, R., Csatho, B.M. and Li, J.. 2007. Subglacial topography and geothermal heat flux: potential interactions with drainage of the Greenland ice sheet. Geophys. Res. Lett., 34(12), L12501. (10.1029/2007GL030046.)
Vittuari, L. and 6 others. 2004. Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse. Ann. Glaciol., 39, 402408.
Waddington, E.D., Neumann, T.A., Koutnik, M.R., Marshall, H.-P. and Morse, D.L.. 2007. Inference of accumulation-rate patterns from deep layers in glaciers and ice sheets. J. Glaciol., 53(183), 694712.
Wingham, D.J., Siegert, M.J., Shepherd, A. and Muir, A.S.. 2006. Rapid doscharge connects Antarctic subglacial lakes. Nature, 440(7087), 10331036.
Wolff, E.W., Jones, A.E., Bauguitte, S.J.B. and Salmon, R.A.. 2008. The interpretation of spikes and trends in concentration of nitrate in polar ice cores, based on evidence from snow and atmospheric measurements. Atmos. Chem. Phys., 8(18), 56275634.
Wright, A.P., Siegert, M.J., Le Brocq, A.M. and Gore, D.B.. 2008. High sensitivity of subglacial hydrological pathways in Antarctica to small ice-sheet changes. Geophys. Res. Lett., 35(17), L17504. (10.1029/2008GL034937.)

Using radar-sounding data to identify the distribution and sources of subglacial water: application to Dome C, East Antarctica

  • Sasha Peter Carter (a1) (a2), Donald D. Blankenship (a2), Duncan A. Young (a2) and John W. Holt (a2)


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